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Mondal K, Kar RK, Chakraborty A, Dey N. Concurrent effect of drought and heat stress in rice ( Oryza sativa L.): physio-biochemical and molecular approach. 3 Biotech 2024; 14:132. [PMID: 38645792 PMCID: PMC11031549 DOI: 10.1007/s13205-024-03980-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 03/25/2024] [Indexed: 04/23/2024] Open
Abstract
The present study was carried out to investigate the physio-biochemical and molecular responses of two rice genotypes (Noichi and N22) under drought, heat and combined drought/heat stress conditions. The antagonistic stomatal activity was found under the combined stress conditions; stomata were open under control and heat stress, conversely, stomata remained closed under drought and combined stress levels. Photosynthetic activity and chlorophyll content are decreased by the overproduction of reactive oxygen species and increased lipid peroxidation in both rice genotypes. To prevent oxidative damage, many antioxidant enzymes like catalase (CAT), ascorbate peroxidase (APX) and superoxide dismutase (SOD) are produced in both genotypes under these conditions. Under the single stress conditions, CAT activity were increased in N22, whereas combined stress levels, SOD and APX activity were higher for both genotypes. Proline accumulation was also increased under single as well as combined stress conditions for both genotypes to combat stress injuries. Pollen viability was lost under all stress levels but severe loss was found under combined stress levels, which causes spikelet sterility leading to yield losses for both genotypes. As evident from transcript levels, HSP71.18 and HSP71.10 expressions were higher under single and combined conditions, butHSP72.57 gene expression increased only by individual stress levels. WRKY11, WRKY 55, DREB 2A, LEA3 and DHN1 were positively expressed under all stress levels. Conversely, expression of DREB2B genes was higher only under single stress levels. In summary, these results suggest that the effect of combined stress is different from the single stress and it is more severe than the individual stress. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-024-03980-1.
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Affiliation(s)
- Kongkong Mondal
- Department of Biotechnology, Rice Biotechnology Laboratory, Visva-Bharati, Santiniketan, West Bengal 731 235 India
| | - Rup Kumar Kar
- Plant Physiology and Biochemistry Laboratory, Department of Botany, Visva-Bharati University, Santiniketan, West Bengal 731 235 India
| | - Abhra Chakraborty
- Department of Fisheries, Meen Bhaban, Karnojora, Uttar Dinajpur, Raiganj, West Bengal 733103 India
| | - Narottam Dey
- Department of Biotechnology, Rice Biotechnology Laboratory, Visva-Bharati, Santiniketan, West Bengal 731 235 India
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Kumari N, Kaur S, Sharma V. Dissecting the role of salicylic acid in mediating stress response in mungbean cultivars concurrently exposed to Macrophomina phaseolina infection and drought stress. Plant Physiol Biochem 2024; 210:108660. [PMID: 38678945 DOI: 10.1016/j.plaphy.2024.108660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 04/07/2024] [Accepted: 04/23/2024] [Indexed: 05/01/2024]
Abstract
The combined stress studies provide fundamental knowledge that could assist in producing multiple stress resilient crops. The fungal phytopathogen, Macrophomina phaseolina is a major limiting factor in the productivity of the crop, Vigna radiata (mungbean). This fungal species tends to flourish under hot and dry conditions. Therefore, in this study the salicylic acid (SA) mediated stress responses in contrasting mungbean cultivars (Shikha and RMG-975) exposed to combined M. phaseolina infection (F) and drought stress (D) have been elucidated. The combined stress was applied to ten days seedlings in three orders i.e. drought followed by fungal infection (DF), drought followed by fungal infection with extended water deficit (DFD) and fungal infection followed by drought stress (FD). The severity of infection was analyzed using ImageJ analysis. Besides, the concentration of SA has been correlated with the phenylpropanoid pathway products, expression of pathogenesis-related proteins (β-1,3-glucanase and chitinase) and the specific activity of certain related enzymes (phenylalanine ammonia lyase, lipoxygenase and glutathione-S-transferase). The data revealed that the cultivar RMG-975 was relatively more tolerant than Shikha under individual stresses. However, the former became more susceptible to the infection under DFD treatment while the latter showed tolerance. Otherwise, the crown rot severity was reduced in both the cultivars under other combined treatments. The stress response analysis suggested that enhanced chitinase expression is vital for tolerance against both, the pathogen and drought stress. Also, it was noted that plants treat each stress combination differently and the role of SA was more prominently visible under individual stress conditions.
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Affiliation(s)
- Nilima Kumari
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Rajasthan, 304022, India.
| | - Sahib Kaur
- Department of Bioscience and Biotechnology, Banasthali Vidyapith, Rajasthan, 304022, India
| | - Vinay Sharma
- Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur 303002, India
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Iguchi A, Hayashi M, Yorifuji M, Nishijima M, Gibu K, Kunishima T, Bell T, Suzuki A, Ono T. Whole transcriptome analysis of demersal fish eggs reveals complex responses to ocean deoxygenation and acidification. Sci Total Environ 2024; 917:169484. [PMID: 38302347 DOI: 10.1016/j.scitotenv.2023.169484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 11/20/2023] [Accepted: 12/16/2023] [Indexed: 02/03/2024]
Abstract
Ocean acidification and deoxygenation co-occur in marine environments, causing deterioration of marine ecosystems. However, effects of compound stresses on marine organisms and their physiological coping mechanisms are largely unknown. Here, we show how high pCO2 and low dissolved oxygen (DO) cause transcriptomic changes in eggs of a demersal fish (Sillago japonica), which are fully exposed to such stresses in natural environment. Overall gene expression was affected more strongly by low DO than by high pCO2. Enrichment analysis detected significant stress responses such as glycolytic processes in response to low DO. Increased expression of a group of glycolytic genes under low DO conditions is presumably because oxygen depletion disables the electron transfer pathway, complementing ATP production in the glycolytic pathway. Contrary to expectations, apparent mitigation of gene expression changes was dominant under combined stress conditions, and may represent an innate fish adaptive trait for severe environments.
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Affiliation(s)
- Akira Iguchi
- Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan; Research Laboratory on Environmentally-conscious Developments and Technologies [E-code], National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8567, Japan.
| | - Masahiro Hayashi
- Demonstration Laboratory, Marine Ecology Research Institute, 4-7-17 Arahama, Kashiwazaki, Niigata 945-0017, Japan
| | - Makiko Yorifuji
- Demonstration Laboratory, Marine Ecology Research Institute, 4-7-17 Arahama, Kashiwazaki, Niigata 945-0017, Japan
| | - Miyuki Nishijima
- Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan
| | - Kodai Gibu
- Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan
| | - Taiga Kunishima
- Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan; Laboratory of Marine Biology, Division of Applied Biological Science, Faculty of Agriculture, Setsunan University, Hirakata, Japan
| | - Tomoko Bell
- Division of Science and Mathmatics, Newman University, Wichita 67213, KS, USA
| | - Atsushi Suzuki
- Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan; Research Laboratory on Environmentally-conscious Developments and Technologies [E-code], National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8567, Japan
| | - Tsuneo Ono
- National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-8648, Japan
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Yang Y, Zhang Q, Lin Q, Sun F, Shen C, Lin H, Su X. Unveiling the PCB biodegradation potential and stress survival strategies of resuscitated strain Pseudomonas sp. HR1. Environ Pollut 2024; 344:123320. [PMID: 38185359 DOI: 10.1016/j.envpol.2024.123320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 01/09/2024]
Abstract
The exploration of resuscitated strains, facilitated by the resuscitation promoting factor (Rpf), has substantially expanded the pool of cultivated degraders, enhancing the screening of bio-inoculants for bioremediation applications. However, it remains unknown whether these resuscitated strains can re-enter the viable but non-culturable (VBNC) state and the specific stress conditions that trigger such a transition. In this work, the whole genome, and polychlorinated biphenyl (PCB)-degrading capabilities of a resuscitated strain HR1, were investigated. Notably, the focus of this exploration was on elucidating whether HR1 would undergo a transition into the VBNC state when exposed to low temperature and PCBs, with and without the presence of heavy metals (HMs). The results suggested that the resuscitated strain Pseudomonas sp. HR1 harbored various functional genes related to xenobiotic biodegradation, demonstrating remarkable efficiency in Aroclor 1242 degradation and strong resistance against stress induced by low temperature and PCBs. Nevertheless, when exposed to the combined stress of low temperature, PCBs, and HMs, HR1 underwent a transition into the VBNC state. This transition was characterized by significant decreases in enzyme activities and notable changes in both morphological and physiological traits when compared to normal cells. Gene expression analysis revealed molecular shifts underlying the VBNC state, with down-regulated genes showed differential expression across multiple pathways and functions, including oxidative phosphorylation, glycolysis, tricarboxylic acid cycle, amino acid metabolism, translation and cytoplasm, while up-regulated genes predominantly associated with transcription regulation, membrane function, quorum sensing, and transporter activity. These findings highlighted the great potential of resuscitated strains as bio-inoculants in bioaugmentation and shed light on the survival mechanisms of functional strains under stressful conditions, which should be carefully considered during bioremediation processes.
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Affiliation(s)
- Yingying Yang
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, China
| | - Qian Zhang
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, China
| | - Qihua Lin
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, China
| | - Faqian Sun
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, China
| | - Chaofeng Shen
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Hongjun Lin
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, China
| | - Xiaomei Su
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, China.
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Aliakbari M, Tahmasebi S, Sisakht JN. Jasmonic acid improves barley photosynthetic efficiency through a possible regulatory module, MYC2-RcaA, under combined drought and salinity stress. Photosynth Res 2024; 159:69-78. [PMID: 38329704 DOI: 10.1007/s11120-023-01074-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 12/28/2023] [Indexed: 02/09/2024]
Abstract
The combined stress of drought and salinity is prevalent in various regions of the world, affects several physiological and biochemical processes in crops, and causes their yield to decrease. Photosynthesis is one of the main processes that are disturbed by combined stress. Therefore, improving the photosynthetic efficiency of crops is one of the most promising strategies to overcome environmental stresses, making studying the molecular basis of regulation of photosynthesis a necessity. In this study, we sought a potential mechanism that regulated a major component of the combined stress response in the important crop barley (Hordeum vulgare L.), namely the Rubisco activase A (RcaA) gene. Promoter analysis of the RcaA gene led to identifying Jasmonic acid (JA)-responsive elements with a high occurrence. Specifically, a Myelocytomatosis oncogenes 2 (MYC2) transcription factor binding site was highlighted as a plausible functional promoter motif. We conducted a controlled greenhouse experiment with an abiotic stress-susceptible barley genotype and evaluated expression profiling of the RcaA and MYC2 genes, photosynthetic parameters, plant water status, and cell membrane damages under JA, combined drought and salinity stress (CS) and JA + CS treatments. Our results showed that applying JA enhances barley's photosynthetic efficiency and water relations and considerably compensates for the adverse effects of combined stress. Significant association was observed among gene expression profiles and evaluated physiochemical characteristics. The results showed a plausible regulatory route through the JA-dependent MYC2-RcaA module involved in photosynthesis regulation and combined stress tolerance. These findings provide valuable knowledge for further functional studies of the regulation of photosynthesis under abiotic stresses toward the development of multiple-stress-tolerant crops.
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Affiliation(s)
- Massume Aliakbari
- Department of Crop Production and Plant Breeding, Shiraz University, Shiraz, Iran.
| | - Sirous Tahmasebi
- Department of Seed and Plant Improvement Research, Fars Agriculture and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Shiraz, Iran.
| | - Javad Nouripour Sisakht
- Department of Plant Production and Genetics, College of Agricultural Engineering, Isfahan University of Technology, Isfahan, Iran
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Ngoupaye GT, Mokgokong M, Madlala T, Mabandla MV. Alteration of the α5 GABA receptor and 5HTT lead to cognitive deficits associated with major depressive-like behaviors in a 14-day combined stress rat model. Int J Neurosci 2023; 133:959-976. [PMID: 34937496 DOI: 10.1080/00207454.2021.2019033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 07/13/2021] [Accepted: 12/08/2021] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Current models used to study the pathophysiology of major depressive disorder (MDD) are laborious and time consuming. This study examined the effect of a 14-day combined stress model (CS; corticosterone injection and restraint stress) in male Sprague-Dawley rats and also compare the effect of CS versus 28-day corticosterone treatment on depressive-like behaviour and cognitive deficits. MATERIEL AND METHODS Depressive-like behaviours and cognitive deficits were assessed in the forced swim test (FST), sucrose preference (SPT), Morris water maze (MWM) and novel object recognition (NORT) tests. Real-time PCR and ELISA were respectively used to detect expression of the serotonin transporter (5-HTT), serotonin 1 A receptor (5-HT1A), α5 GABAA receptor, and the concentrations of corticosterone (plasma), GABA and acetylcholinesterase (AChE) in the hippocampus and Prefrontal cortex (PFC).Results CS group showed increased immobility time in the FST, time to reach the MWM platform, higher corticosterone level, and increased expressions of hippocampal and PFC 5-HT1A and α5 GABAA receptors, and AChE compared to their control groups. In contrast, reductions in SPT ratio, discrimination index in NORT, time in target quadrant, and hippocampal 5-HTT expression was noted relative to their control group. Compared to the 28-day corticosterone only group, PFC 5-HT1A, Hippocampal 5-HTT were reduced, while PFC 5-HTT, Hippocampal α5 GABAA receptors, and AChE concentrations were higher in the CS group. CONCLUSION Our CS model induced depressive-like behaviour with early cognitive deficits in rats affecting both hippocampus and PFC. The CS model may be useful in investigating new and comprehensive treatment strategies for MDD.
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Affiliation(s)
- Gwladys Temkou Ngoupaye
- Discipline of Human Physiology, School of Laboratory Medicine & Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
- Department of Animal Biology, Faculty of Science, University of Dschang, Dschang, Cameroon
| | - Makwena Mokgokong
- Discipline of Human Physiology, School of Laboratory Medicine & Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Thobeka Madlala
- Discipline of Human Physiology, School of Laboratory Medicine & Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Musa Vuyisile Mabandla
- Discipline of Human Physiology, School of Laboratory Medicine & Medical Sciences, College of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
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Gao Y, Huang W, Jiang N, Fang JKH, Hu M, Shang Y, Wang Y. Combined effects of microfibers and polychlorinated biphenyls on the immune function of hemocytes in the mussel Mytilus coruscus. Mar Environ Res 2023; 192:106214. [PMID: 37865594 DOI: 10.1016/j.marenvres.2023.106214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/20/2023] [Accepted: 09/26/2023] [Indexed: 10/23/2023]
Abstract
Numerous studies have shown that microplastics can interact with other pollutants in the environment to produce synergistic effects, leading to more serious impacts. To date, there is little consensus on the combined effects of microfibers (MFs) and polychlorinated biphenyls (PCBs, Aroclor 1254), two legacy and alarming environmental pollutants. There is an urgent need to assess the impact of combined exposures on bivalve immune defences. In this study, we assessed the immune response of the mussels (Mytilus coruscus) hemocyte to MFs and PCBs alone and in combination by using flow cytometry. M. coruscus were exposed to MFs (1000 pieces/L) and PCBs (PCBs) (100 ng/L and 1000 ng/L) alone or in combination for 14 consecutive days and recovered for 7 days. The hemocyte of M. coruscus was collected on day 7, 14 and 21. MF exposure alone had no effect on the hemocyte. The total hemocyte count (THC), esterase (EA), lysosomal contents (LC), mitochondrial number (MN) and mitochondrial membrane potential (MMP) of mussels showed a decreasing trend with increasing PCB concentrations, both individually and in combination; The decreases in EA, MN and MMP were associated with the induction of reactive oxygen species (ROS). Hemocyte mortality (HM) was associated with a decrease in THC. Combined exposure to MFs and PCBs would exacerbate the effects on hemocyte immunity. These new findings improve our understanding of the toxic effects of MFs and organic chemical pollutants, and demonstrate the potential mechanism of PCBs to bivalves through changes in hemolymph immunity-related indicators.
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Affiliation(s)
- Yiming Gao
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Wei Huang
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China; Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China
| | - Ningjin Jiang
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - James K H Fang
- Department of Food Science and Nutrition, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, China
| | - Menghong Hu
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Yueyong Shang
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China.
| | - Youji Wang
- International Research Center for Marine Biosciences at Shanghai Ocean University, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China.
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Ju C, Wang L, You Y, Ma F. NaCl-mediated strategies for the trade-off between Cd bioconcentration and translocation in Solanum nigrum L. J Hazard Mater 2023; 459:132075. [PMID: 37478593 DOI: 10.1016/j.jhazmat.2023.132075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/18/2023] [Accepted: 07/14/2023] [Indexed: 07/23/2023]
Abstract
Salt interference significantly affects the behavior of heavy metals in the environment. This study compared and analyzed the response process, migration, and transformation of cadmium (Cd) in the hyperaccumulator Solanum nigrum (S. nigrum) under different NaCl levels to reveal the interference mechanisms of salt in plant remediation of Cd-contaminated soil. The results showed that Cd and salt stress significantly inhibited the growth of plants. The stress effect had more potent growth inhibition at the root than aboveground, thus inducing changes in the spatial configuration of the plants (decreased root-to-aboveground biomass ratio). Salt could activate Cd in plants, enhancing the inhibitory effect on plant growth. Salt increased Cd bioavailability due to the rhizosphere acidification effect, increasing plants' Cd accumulation. The Cd bioconcentration factor in plant roots peaked during the high Cd-high salt treatment (117.10), but the Cd accumulation of plants peaked during the high Cd-low salt treatment (233.04 μg plant-1). Salt additions and increased Cd concentrations enhanced root compartmentalization, inhibiting Cd transport to the aboveground. Changes in Fourier-transform infrared spectroscopy (FTIR) measurements confirmed that the functional groups in plants provided binding sites for Cd. These findings can help guide the phytoremediation of Cd contamination under saline soil conditions.
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Affiliation(s)
- Chang Ju
- State Key Lab of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73, Huanghe Road, Nangang District, Harbin 150090, People's Republic of China
| | - Li Wang
- State Key Lab of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73, Huanghe Road, Nangang District, Harbin 150090, People's Republic of China.
| | - Yongqiang You
- State Key Lab of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73, Huanghe Road, Nangang District, Harbin 150090, People's Republic of China
| | - Fang Ma
- State Key Lab of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, No. 73, Huanghe Road, Nangang District, Harbin 150090, People's Republic of China
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Charfeddine M, Chiab N, Charfeddine S, Ferjani A, Gargouri-Bouzid R. Heat, drought, and combined stress effect on transgenic potato plants overexpressing the StERF94 transcription factor. J Plant Res 2023; 136:549-562. [PMID: 36988761 DOI: 10.1007/s10265-023-01454-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 03/17/2023] [Indexed: 06/09/2023]
Abstract
Despite their economic importance worldwide, potato plants are sensitive to various abiotic constraints, such as drought and high temperatures, which cause significant losses in yields and tuber quality. Moreover, because of the climate change phenomenon, plants are frequently subjected to combined stresses, mainly high temperatures and drought. In this context, breeding for tolerant varieties should consider not only plant response to drought or high temperature but also to combined stresses. In the current study, we studied transgenic potato plants overexpressing an ethylene response transcription factor (TF; StERF94) involved in abiotic stress response signaling pathways. Our previous results showed that these transgenic plants display tolerance to salt stress more than wildtype (WT). In this work, we aimed to investigate the effects of drought, heat, and combined stresses on transgenic potato plants overexpressing StERF94 TF under in vitro culture conditions. The obtained results revealed that StERF94 overexpression improved the tolerance of the transgenic plants to drought, heat, and combined stresses through better control of the leaf water and chlorophyll contents, activation of antioxidant enzymes, and an accumulation of proline, especially in the leaves. Indeed, the expression level of antioxidant enzyme-encoding genes (CuZnSOD, FeSOD, CAT1, and CAT2) was significantly induced by the different stress conditions in the transgenic potato plants compared with the WT plants. This study further confirms that StERF94 TF may be implicated in regulating the expression of target genes encoding antioxidant enzymes.
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Affiliation(s)
- Mariam Charfeddine
- Plant Amelioration and Valorization of Agri-resource Laboratory, National School of Engineers of Sfax (ENIS), Sfax, Tunisia
| | - Nour Chiab
- Plant Amelioration and Valorization of Agri-resource Laboratory, National School of Engineers of Sfax (ENIS), Sfax, Tunisia.
| | - Safa Charfeddine
- Plant Amelioration and Valorization of Agri-resource Laboratory, National School of Engineers of Sfax (ENIS), Sfax, Tunisia
| | - Aziza Ferjani
- Plant Amelioration and Valorization of Agri-resource Laboratory, National School of Engineers of Sfax (ENIS), Sfax, Tunisia
| | - Radhia Gargouri-Bouzid
- Plant Amelioration and Valorization of Agri-resource Laboratory, National School of Engineers of Sfax (ENIS), Sfax, Tunisia
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Vitale L, Francesca S, Arena C, D'Agostino N, Principio L, Vitale E, Cirillo V, de Pinto MC, Barone A, Rigano MM. Multitraits evaluation of a Solanum pennellii introgression tomato line challenged by combined abiotic stress. Plant Biol (Stuttg) 2023; 25:518-528. [PMID: 36942418 DOI: 10.1111/plb.13518] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 03/14/2023] [Indexed: 05/17/2023]
Abstract
Rising daily temperatures and water shortage are two of the major concerns in agriculture. In this work, we analysed the tolerance traits in a tomato line carrying a small region of the Solanum pennellii wild genome (IL12-4-SL) when grown under prolonged conditions of single and combined high temperature and water stress. When exposed to stress, IL12-4-SL showed higher heat tolerance than the cultivated line M82 at morphological, physiological, and biochemical levels. Moreover, under stress IL12-4-SL produced more flowers than M82, also characterized by higher pollen viability. In both lines, water stress negatively affected photosynthesis more than heat alone, whereas the combined stress did not further exacerbate the negative impacts of drought on this trait. Despite an observed decrease in carbon fixation, the quantum yield of PSII linear electron transport in IL12-4-SL was not affected by stress, thereby indicating that photochemical processes other than CO2 fixation acted to maintain the electron chain in oxidized state and prevent photodamage. The ability of IL12-4-SL to tolerate abiotic stress was also related to the intrinsic ability of this line to accumulate ascorbic acid. The data collected in this study clearly indicate improved tolerance to single and combined abiotic stress for IL12-4-SL, making this line a promising one for cultivation in a climate scenario characterized by frequent and long-lasting heatwaves and low rainfall.
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Affiliation(s)
- L Vitale
- National Research Council (CNR), Department of Biology, Agriculture and Food Sciences (DiSBA), Institute for Agricultural and Forestry Systems in the Mediterranean (ISAFoM), Portici, Naples, Italy
| | - S Francesca
- Department of Agricultural Sciences, University of Naples "Federico II", Portici, Naples, Italy
| | - C Arena
- Department of Biology, University of Naples "Federico II", Naples, Italy
- NBFC - National Biodiversity Future Center, Palermo, Italy
| | - N D'Agostino
- Department of Agricultural Sciences, University of Naples "Federico II", Portici, Naples, Italy
| | - L Principio
- Department of Agricultural Sciences, University of Naples "Federico II", Portici, Naples, Italy
| | - E Vitale
- Department of Biology, University of Naples "Federico II", Naples, Italy
| | - V Cirillo
- Department of Agricultural Sciences, University of Naples "Federico II", Portici, Naples, Italy
| | - M C de Pinto
- Department of Biology, University of Bari "Aldo Moro", Bari, Italy
| | - A Barone
- Department of Agricultural Sciences, University of Naples "Federico II", Portici, Naples, Italy
| | - M M Rigano
- Department of Agricultural Sciences, University of Naples "Federico II", Portici, Naples, Italy
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11
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Kosová K, Prášil IT, Klíma M, Nesvadba Z, Vítámvás P, Ovesná J. Proteomics of wheat and barley cereals in response to environmental stresses: Current state and future challenges. J Proteomics 2023; 282:104923. [PMID: 37160224 DOI: 10.1016/j.jprot.2023.104923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 04/27/2023] [Accepted: 05/01/2023] [Indexed: 05/11/2023]
Abstract
Wheat and barley genera represent a wide range of genotypes from Triticeae group grown around the globe. The broad plasticity of Triticeae phenotypes mirrors the robustness of their genomes revealing a high level of gene homeology. Publication and annotation of the reference genome sequences for spring barley Morex and Chinese Spring wheat represents an important milestone enabling the researchers to precisely identify and annotate nearly all proteins. Due to the broad range of environments used for wheat and barley cultivation and their economical importance, proteomic studies focused on their responses to environmental stresses including combined stress treatments. Most of the Triticeae stress proteomics studies are comparative ones aimed at determination of differentially abundant proteins (DAPs) between two or more genotypes with contrasting stress tolerance. Studies focused on subcellular fractions and protein posttranslational modifications (PTMs) are still relatively rare although PTMs play a crucial role in modulation of protein biological function. Functional and interactomics studies are needed although gene homeology and the resulting protein functional redundancy practically excludes the utilization of knock-out mutants. The alternatives could represent either gene overexpression in a heterologous system such as A. thaliana or transient posttranscriptional gene silencing using RNAi. Publication of complete reference genome sequences together with novel technological approaches such as pQTL mapping boost the Triticeae proteomics studies not only to provide data but also to contribute to designing novel genotypes with improved adaptations to ever changing environments.
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Affiliation(s)
- Klára Kosová
- Division of Crop Genetics, Breeding and Crop Quality, Crop Research Institute, Drnovská 507/73, 16100 Prague 6 - Ruzyně, Czechia.
| | - Ilja Tom Prášil
- Division of Crop Genetics, Breeding and Crop Quality, Crop Research Institute, Drnovská 507/73, 16100 Prague 6 - Ruzyně, Czechia
| | - Miroslav Klíma
- Division of Crop Genetics, Breeding and Crop Quality, Crop Research Institute, Drnovská 507/73, 16100 Prague 6 - Ruzyně, Czechia
| | - Zdeněk Nesvadba
- Division of Crop Genetics, Breeding and Crop Quality, Crop Research Institute, Drnovská 507/73, 16100 Prague 6 - Ruzyně, Czechia
| | - Pavel Vítámvás
- Division of Crop Genetics, Breeding and Crop Quality, Crop Research Institute, Drnovská 507/73, 16100 Prague 6 - Ruzyně, Czechia
| | - Jaroslava Ovesná
- Division of Crop Genetics, Breeding and Crop Quality, Crop Research Institute, Drnovská 507/73, 16100 Prague 6 - Ruzyně, Czechia
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12
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De Palma N, Yendo ACA, Vilasboa J, Chacon DS, Fett-Neto AG. Biochemical responses in leaf tissues of alkaloid producing Psychotria brachyceras under multiple stresses. J Plant Res 2023; 136:397-412. [PMID: 36809401 DOI: 10.1007/s10265-023-01441-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Under natural conditions plants are generally subjected to complex scenarios of combined or sequential environmental stresses. Among the various components of plant biochemistry modulated by abiotic variables, a pivotal role is played by antioxidant systems, including specialized metabolites and their interaction with central pathways. To help address this knowledge gap, a comparative analysis of metabolic changes in leaf tissues of the alkaloid accumulating plant Psychotria brachyceras Müll Arg. under individual, sequential, and combined stress conditions was carried out. Osmotic and heat stresses were evaluated. Protective systems (accumulation of the major antioxidant alkaloid brachycerine, proline, carotenoids, total soluble protein, and activity of the enzymes ascorbate peroxidase and superoxide dismutase) were measured in conjunction with stress indicators (total chlorophyll, ChA/ChB ratio, lipid peroxidation, H2O2 content and electrolyte leakage). Metabolic responses had a complex profile in sequential and combined stresses compared to single ones, being also modified over time. Different stress application schemes affected alkaloid accumulation in distinct ways, exhibiting similar profile to proline and carotenoids, constituting a complementary triad of antioxidants. These complementary non-enzymatic antioxidant systems appeared to be essential for mitigating stress damage and re-establishing cellular homeostasis. The data herein provides clues that may aid the development of a key component framework of stress responses and their appropriate balance to modulate tolerance and yield of target specialized metabolites.
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Affiliation(s)
- Nicolás De Palma
- Plant Physiology Laboratory, Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil
| | - Anna Carolina Alves Yendo
- Plant Physiology Laboratory, Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil
- Plant Physiology Laboratory, Center for Biotechnology, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil
| | - Johnatan Vilasboa
- Plant Physiology Laboratory, Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil
| | - Daisy Sotero Chacon
- Pharmacognosy Laboratory, Department of Pharmacy, Federal University of Rio Grande do Norte, CP 59000, Natal, RN, 59012-570, Brazil
| | - Arthur Germano Fett-Neto
- Plant Physiology Laboratory, Department of Botany, Biosciences Institute, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil.
- Plant Physiology Laboratory, Center for Biotechnology, Federal University of Rio Grande do Sul, CP 15005, Porto Alegre, RS, 91501-970, Brazil.
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13
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Chaudhari RS, Jangale BL, Krishna B, Sane PV. Improved abiotic stress tolerance in Arabidopsis by constitutive active form of a banana DREB2 type transcription factor, MaDREB20.CA, than its native form, MaDREB20. Protoplasma 2023; 260:671-690. [PMID: 35996008 DOI: 10.1007/s00709-022-01805-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
Banana is grown as one of the important fruit crops in tropical and subtropical regions of the world. In this study, we report induced expression of a dehydration responsive element binding 2 (DREB2) gene (MaDREB20) under individual heat, drought, and combined drought and heat stress in root of two banana genotypes Grand Nain (GN) and Hill Banana (HB). Motif analysis of MaDREB20 protein demonstrated the presence of a negative regulatory domain (NRD) or PEST motif between 150 and 184 amino acids. Transgenic Arabidopsis overexpressing MaDREB20 gene showed more survival rate, above-ground biomass, seed yield, leaf relative water content, and proline content but less ion leakage and malonaldehyde content, revealing improved tolerance against heat and drought as well as their combination than the wild-type. Overexpression of MaDREB20.CA (constitutive active form of MaDREB20 after removal of PEST region) showed better abiotic stress tolerance in Arabidopsis than its native form (MaDREB20). Transgenic Arabidopsis overexpressing MaDREB20 and MaDREB20.CA genes appeared to be associated with reduced stomatal densities under normal condition, better regulation of stomatal aperture under drought than in wild-type plants, and differential regulation of downstream target (AtTCH4 and AtIAA1) genes under heat, drought, and combined stress. Taken together, our findings revealed important functions of MaDREB20 in abiotic stress responses in transgenic Arabidopsis and could form a basis for CRISPR/Cas9-mediated removal of its NRD to enhance stress tolerance in banana.
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Affiliation(s)
- Rakesh Shashikant Chaudhari
- Jain R&D lab is a Recognized Research Centre by Kavayitri Bahinabai Chaudhari North Maharashtra University, Bambhori, Jalgaon, 425001, India
| | - Bhavesh Liladhar Jangale
- Jain R&D lab is a Recognized Research Centre by Kavayitri Bahinabai Chaudhari North Maharashtra University, Bambhori, Jalgaon, 425001, India
| | - Bal Krishna
- Jain R&D lab is a Recognized Research Centre by Kavayitri Bahinabai Chaudhari North Maharashtra University, Bambhori, Jalgaon, 425001, India.
| | - Prafullachandra Vishnu Sane
- Jain R&D lab is a Recognized Research Centre by Kavayitri Bahinabai Chaudhari North Maharashtra University, Bambhori, Jalgaon, 425001, India
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14
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Thapa R, Tabien RE, Johnson CD, Septiningsih EM. Comparative transcriptomic analysis of germinating rice seedlings to individual and combined anaerobic and cold stress. BMC Genomics 2023; 24:185. [PMID: 37024819 PMCID: PMC10080786 DOI: 10.1186/s12864-023-09262-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 03/20/2023] [Indexed: 04/08/2023] Open
Abstract
BACKGROUND Rice is one of the most important cereals consumed worldwide. Two major abiotic factors affecting rice plants in different growth stages are flooding stress and cold stress. These abiotic stresses can take place independently or simultaneously and significantly affect rice plants during germination and seedling growth. Fortunately, a wide array of phenotypic responses conferring flooding stress and chilling stress tolerance exist within the rice germplasm, indicating the presence of different molecular mechanisms underlying tolerance to these stresses. Understanding these differences may assist in developing improved rice cultivars having higher tolerance to both stresses. In this study, we conducted a comparative global gene expression analysis of two rice genotypes with contrasting phenotypes under cold stress, anaerobic stress, and combined cold and anaerobic stress during germination. RESULTS The differential gene expression analysis revealed that 5571 differentially expressed genes (DEGs), 7206 DEGs, and 13279 DEGs were identified under anaerobic stress, cold stress, and combined stress, respectively. Genes involved in the carbohydrate metabolic process, glucosyltransferase activity, regulation of nitrogen compound metabolic process, protein metabolic process, lipid metabolic process, cellular nitrogen compound biosynthetic process, lipid biosynthetic process, and a microtubule-based process were enriched across all stresses. Notably, the common Gene Ontology (GO) analysis identified three hub genes, namely Os08g0176800 (similar to mRNA-associated protein mrnp 41), Os11g0454200 (dehydrin), and OS10g0505900 (expressed protein). CONCLUSION A large number of differentially expressed genes were identified under anaerobic, cold conditions during germination and the combination of the two stress conditions in rice. These results will assist in the identification of promising candidate genes for possible manipulation toward rice crops that are more tolerant under flooding and cold during germination, both independently and concurrently.
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Affiliation(s)
- Ranjita Thapa
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, 77843, USA
- Present address: Section of Plant Breeding and Genetics, School of Integrative Plant Sciences, Cornell University, Ithaca, NY, 14853, USA
| | | | - Charles D Johnson
- Genomics and Bioinformatics Service, Texas A&M AgriLife Research, College Station, TX, 77843, USA
| | - Endang M Septiningsih
- Department of Soil and Crop Sciences, Texas A&M University, College Station, TX, 77843, USA.
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15
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Ru C, Hu X, Chen D, Wang W, Zhen J, Song T. Individual and combined effects of heat and drought and subsequent recovery on winter wheat (Triticum aestivum L.) photosynthesis, nitrogen metabolism, cell osmoregulation, and yield formation. Plant Physiol Biochem 2023; 196:222-235. [PMID: 36724706 DOI: 10.1016/j.plaphy.2023.01.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Extreme temperatures and droughts are considered as the two main factors that limit wheat growth and production. Although responses of wheat plants to heat and drought stress have been extensively investigated, little is known about the extent to which wheat plants can recover after stress relief. In this study, a winter wheat pot experiment was conducted to evaluate the growth, physiological activities, and yield formation responses of wheat to stress and recovery periods under heat stress (36 °C, daily maximum temperature), drought (45-55% of soil water holding capacity), and combined stress conditions. Heat and drought stress significantly reduced photosynthesis, leaf relative water content (LRWC), leaf water potential (LWPnoon), and nitrogen metabolism enzyme activities and increased electrolyte leakage. These parameters showed significant interactions between heat and drought stress. Beneficial osmoregulation of membrane stability was observed in stressed plants because of the accumulation of proline and soluble sugars. Within a range of stresses, the abovementioned physiological processes of individual heat- and drought-stressed plants recovered to levels comparable to those of the control. The recovery capacities of the physiological traits decreased gradually with increasing stress duration, particularly under combined stress. The recovery of LWPnoon and LRWC contributed to the improved photosynthetic performance after stress relief. The combined stress caused greater yield losses than individual heat and drought stress, which was mainly attributed to low levels of thousand grain weight (TGW), the number of grains per ear, and the grain filling rate. After stress relief, the recovery of proline content, glutamine synthetase activity, photosynthetic rate, and LRWC were closely associated with grain yield and thousand grain weight. Collectively, these findings contribute to a better understanding of the coordinated responses of winter wheat during the combined heat and drought stress and recovery periods.
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Affiliation(s)
- Chen Ru
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China.
| | - Xiaotao Hu
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China.
| | - Dianyu Chen
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China.
| | - Wene Wang
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China.
| | - Jingbo Zhen
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China.
| | - Tianyuan Song
- Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China.
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16
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Wellpott K, Jozefowicz AM, Meise P, Schum A, Seddig S, Mock HP, Winkelmann T, Bündig C. Combined nitrogen and drought stress leads to overlapping and unique proteomic responses in potato. Planta 2023; 257:58. [PMID: 36795167 PMCID: PMC9935667 DOI: 10.1007/s00425-023-04085-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
Nitrogen deficient and drought-tolerant or sensitive potatoes differ in proteomic responses under combined (NWD) and individual stresses. The sensitive genotype 'Kiebitz' exhibits a higher abundance of proteases under NWD. Abiotic stresses such as N deficiency and drought affect the yield of Solanum tuberosum L. tremendously. Therefore, it is of importance to improve potato genotypes in terms of stress tolerance. In this study, we identified differentially abundant proteins (DAPs) in four starch potato genotypes under N deficiency (ND), drought stress (WD), or combined stress (NWD) in two rain-out shelter experiments. The gel-free LC-MS analysis generated a set of 1177 identified and quantified proteins. The incidence of common DAPs in tolerant and sensitive genotypes under NWD indicates general responses to this stress combination. Most of these proteins were part of the amino acid metabolism (13.9%). Three isoforms of S-adenosyl methionine synthase (SAMS) were found to be lower abundant in all genotypes. As SAMS were found upon application of single stresses as well, these proteins appear to be part of the general stress response in potato. Interestingly, the sensitive genotype 'Kiebitz' showed a higher abundance of three proteases (subtilase, carboxypeptidase, subtilase family protein) and a lower abundance of a protease inhibitor (stigma expressed protein) under NWD stress compared to control plants. The comparably tolerant genotype 'Tomba', however, displayed lower abundances of proteases. This indicates a better coping strategy for the tolerant genotype and a quicker reaction to WD when previously stressed with ND.
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Affiliation(s)
- Katharina Wellpott
- Department of Woody Plant and Propagation Physiology, Institute of Horticultural Production Systems, Leibniz University Hannover, Herrenhäuser Straße 2, 30419, Hannover, Germany
| | - Anna M Jozefowicz
- Applied Biochemistry, Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstr. 3, 06466, Seeland, Germany
| | - Philipp Meise
- Institute for Resistance Research and Stress Tolerance, Julius-Kühn-Institute (JKI), Bundesforschungsinstitut Für Kulturpflanzen, Rudolf-Schick-Platz 3a, 18190, Sanitz, Germany
| | - Annegret Schum
- Institute for Resistance Research and Stress Tolerance, Julius-Kühn-Institute (JKI), Bundesforschungsinstitut Für Kulturpflanzen, Rudolf-Schick-Platz 3a, 18190, Sanitz, Germany
| | - Sylvia Seddig
- Institute for Resistance Research and Stress Tolerance, Julius-Kühn-Institute (JKI), Bundesforschungsinstitut Für Kulturpflanzen, Rudolf-Schick-Platz 3a, 18190, Sanitz, Germany
| | - Hans-Peter Mock
- Applied Biochemistry, Department of Physiology and Cell Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstr. 3, 06466, Seeland, Germany
- Universidad de Costa Rica, CIGRAS, 11501-2060, San Pedro, Costa Rica
| | - Traud Winkelmann
- Department of Woody Plant and Propagation Physiology, Institute of Horticultural Production Systems, Leibniz University Hannover, Herrenhäuser Straße 2, 30419, Hannover, Germany
| | - Christin Bündig
- Department of Woody Plant and Propagation Physiology, Institute of Horticultural Production Systems, Leibniz University Hannover, Herrenhäuser Straße 2, 30419, Hannover, Germany.
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17
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Kaur H, Kaur R, Singh S, Jagota N, Kaur G, Manchanda G, Bindra S, Sharma A. Morphological and antioxidant responses of Cicer arietinum L. genotypes exposed to combination stress of anthracene and sodium chloride. Chemosphere 2023; 313:137419. [PMID: 36460161 DOI: 10.1016/j.chemosphere.2022.137419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/11/2022] [Accepted: 11/26/2022] [Indexed: 06/17/2023]
Abstract
Various mutagenic, carcinogenic pollutants such as Polycyclic Aromatic Hydrocarbons (PAHs) are released into the environment posing a negative effect on plant metabolism. All the pollutants that are emitted into the atmosphere, ultimately find their way into the plant. Soil salinity stress is one of the major determinants of crop productivity. Different plants respond differently to different abiotic stress present alone or in combination. One such combination of abiotic stress is PAHs and salinity stress. The present research aims to study the effect of the application of NaCl and Anthracene alone and in various combinations on two chickpea genotypes GPF2 and PDG4. A 21 days laboratory experiment was conducted in petriplates and growth pouches. Different concentrations of NaCl and Anthracene were given to two chickpea genotypes viz. GPF2 and PDG4, alone as well as in combinations to study morphological, physiological and antioxidant responses. Results obtained were further analyzed by using various statistical measures such as Principle Component Analysis and Two-way ANOVA. Results indicated that under the dual presence of NaCl and Anthracene, GPF2 exhibited higher activities of antioxidant enzymes and was shown to have a negative correlation with plant height and chlorophyll content. Based on the results of the present investigation, it was concluded that GPF2 was a better performing chickpea genotype towards the combined presence of Anthracene and NaCl as compared to PDG4.
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Affiliation(s)
- Harleen Kaur
- Department of Botany and Environment Science, DAV University, Jalandhar, India
| | - Ravneet Kaur
- Department of Botany and Environment Science, DAV University, Jalandhar, India
| | - Swapnil Singh
- Department of Botany and Environment Science, DAV University, Jalandhar, India
| | - Neetu Jagota
- Department of Botany and Environment Science, DAV University, Jalandhar, India
| | - Gurjit Kaur
- Department of Botany and Environment Science, DAV University, Jalandhar, India
| | | | - Shayla Bindra
- Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, India
| | - Ashish Sharma
- Department of Botany and Environment Science, DAV University, Jalandhar, India.
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Xia H, Chen K, Liu L, Plenkovic-Moraj A, Sun G, Lei Y. Photosynthetic regulation in fluctuating light under combined stresses of high temperature and dehydration in three contrasting mosses. Plant Sci 2022; 323:111379. [PMID: 35850284 DOI: 10.1016/j.plantsci.2022.111379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/28/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
Photosynthesis regulation is fundamental for the response to environmental dynamics, especially for bryophytes during their adaptation to terrestrial life. Alternative electron flow mediated by flavodiiron proteins (FLV) and cyclic electron flow (CEF) around photosystem I (PSI) play seminal roles in the response to abiotic stresses in mosses; nevertheless, their correlation and relative contribution to photoprotection of mosses exposed to combined stresses remain unclear. In the present study, the photosynthetic performance and recovery capacity of three moss species from different growth habitats were examined during heat and dehydration with fluctuating light. Our results showed that dehydration at 22 °C for 24 h caused little photodamage, and most of the parameters recovered to their original values after rehydration. In contrast, dehydration at 38 °C caused drastic injuries, especially to PSII, which was mainly caused by the inactivation of non-photochemical quenching (NPQ). Dehydration also induced a high accumulation of O2- and H2O2. A consistently higher CEF as well as a positive correlation between CEF and FLV was observed in resistant R. japonicum, implying CEF played a more important protective role for R. japonicum. In H. plumaeforme and P. cuspidatum, the positive relationship under mild stress switched to negative when stress became severe. Therefore, FLV pathway was sensitive to environmental fluctuations and maybe less efficient than CEF thus, readily to be lost during land colonization and evolution in angiosperms. Our work provides insights into the coordination of various pathways to fine-tune photosynthetic protection and can be used as a basis for species screening and development of breeding strategies for degraded ecosystem restoration with pioneering mosses.
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Affiliation(s)
- Hongxia Xia
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China; China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Ke Chen
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
| | - Lilan Liu
- China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Anđelka Plenkovic-Moraj
- Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, Zagreb 10000, Croatia
| | - Geng Sun
- China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Yanbao Lei
- China-Croatia "Belt and Road" Joint Laboratory on Biodiversity and Ecosystem Services, CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.
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19
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Zhou R, Yu X, Song X, Rosenqvist E, Wan H, Ottosen CO. Salinity, waterlogging, and elevated [CO2] interact to induce complex responses in cultivated and wild tomato. J Exp Bot 2022; 73:5252-5263. [PMID: 35218649 DOI: 10.1093/jxb/erac080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
The effects of individual climatic factors on crops are well documented, whereas the interaction of such factors in combination has received less attention. The frequency of salinity and waterlogging stress is increasing with climate change, accompanied by elevated CO2 concentration (e[CO2]). This study explored how these three variables interacted and affected two tomato genotypes. Cultivated and wild tomato (Solanum lycopersicum and Solanum pimpinellifolium) were grown at ambient [CO2] and e[CO2], and subjected to salinity, waterlogging, and combined stress. Leaf photosynthesis, chlorophyll fluorescence, quenching analysis, pigment, and plant growth were analyzed. The response of tomatoes depended on both genotype and stress type. In cultivated tomato, photosynthesis was inhibited by salinity and combined stress, whereas in wild tomato, both salinity and waterlogging stress, alone and in combination, decreased photosynthesis. e[CO2] increased photosynthesis and biomass of cultivated tomato under salinity and combined stress compared with ambient [CO2]. Differences between tomato genotypes in response to individual and combined stress were observed in key photosynthetic and growth parameters. Hierarchical clustering and principal component analysis revealed genetic variations of tomatoes responding to the three climatic factors. Understanding the interacting effects of salinity and waterlogging with e[CO2] in tomato will facilitate improvement of crop resilience to climate change.
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Affiliation(s)
- Rong Zhou
- Department of Food Science, Aarhus University, Aarhus, Denmark
- College of Horticulture, Nanjing Agricultural University, Jiangsu, Nanjing, China
| | - Xiaqing Yu
- College of Horticulture, Nanjing Agricultural University, Jiangsu, Nanjing, China
| | - Xiaoming Song
- College of Life Sciences, North China University of Science and Technology, Tangshan, Hebei, China
| | - Eva Rosenqvist
- Department of Plant and Environmental Sciences, University of Copenhagen, Taastrup, Denmark
| | - Hongjian Wan
- Institute of Vegetables, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
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20
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Pal G, Bakade R, Deshpande S, Sureshkumar V, Patil SS, Dawane A, Agarwal S, Niranjan V, PrasannaKumar MK, Vemanna RS. Transcriptomic responses under combined bacterial blight and drought stress in rice reveal potential genes to improve multi-stress tolerance. BMC Plant Biol 2022; 22:349. [PMID: 35850621 PMCID: PMC9290298 DOI: 10.1186/s12870-022-03725-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 06/29/2022] [Indexed: 05/26/2023]
Abstract
BACKGROUND The unprecedented drought and frequent occurrence of pathogen infection in rice is becoming more due to climate change. Simultaneous occurrence of stresses lead to more crop loss. To cope up multiple stresses, the durable resistant cultivars needs to be developed, by identifying relevant genes from combined biotic and abiotic stress exposed plants. RESULTS We studied the effect of drought stress, bacterial leaf blight disease causing Xanthomonas oryzae pv. oryzae (Xoo) pathogen infection and combined stress in contrasting BPT5204 and TN1 rice genotypes. Mild drought stress increased Xoo infection irrespective of the genotype. To identify relevant genes that could be used to develop multi-stress tolerant rice, RNA sequencing from individual drought, pathogen and combined stresses in contrasting genotypes has been developed. Many important genes are identified from resistant genotype and diverse group of genes are differentially expressed in contrasting genotypes under combined stress. Further, a meta-analysis from individual drought and Xoo pathogen stress from public domain data sets narrowed- down candidate differentially expressed genes. Many translation associated genes are differentially expressed suggesting their extra-ribosomal function in multi-stress adaptation. Overexpression of many of these genes showed their relevance in improving stress tolerance in rice by different scientific groups. In combined stress, many downregulated genes also showed their relevance in stress adaptation when they were over-expressed. CONCLUSIONS Our study identifies many important genes, which can be used as molecular markers and targets for genetic manipulation to develop durable resistant rice cultivars. Strategies should be developed to activate downregulated genes, to improve multi-stress tolerance in plants.
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Affiliation(s)
- Garima Pal
- Laboratory of Plant Functional Genomics, Regional Centre for Biotechnology, Faridabad-Gurgaon Expressway, NCR Biotech Science Cluster, 3rd Milestone, Faridabad, Haryana, 121 001, India
| | - Rahul Bakade
- Department of Plant Pathology, University of Agricultural Sciences, GKVK, Bengaluru, 560065, India
| | - Sanjay Deshpande
- Laboratory of Plant Functional Genomics, Regional Centre for Biotechnology, Faridabad-Gurgaon Expressway, NCR Biotech Science Cluster, 3rd Milestone, Faridabad, Haryana, 121 001, India
| | - V Sureshkumar
- Laboratory of Plant Functional Genomics, Regional Centre for Biotechnology, Faridabad-Gurgaon Expressway, NCR Biotech Science Cluster, 3rd Milestone, Faridabad, Haryana, 121 001, India
| | - Swathi S Patil
- Department of Plant Pathology, University of Agricultural Sciences, GKVK, Bengaluru, 560065, India
| | - Akashata Dawane
- Laboratory of Plant Functional Genomics, Regional Centre for Biotechnology, Faridabad-Gurgaon Expressway, NCR Biotech Science Cluster, 3rd Milestone, Faridabad, Haryana, 121 001, India
| | - Subham Agarwal
- Laboratory of Plant Functional Genomics, Regional Centre for Biotechnology, Faridabad-Gurgaon Expressway, NCR Biotech Science Cluster, 3rd Milestone, Faridabad, Haryana, 121 001, India
| | - Vidya Niranjan
- Department of Biotechnology, R.V. Engineering College, Bengaluru, 560059, India
| | - M K PrasannaKumar
- Department of Plant Pathology, University of Agricultural Sciences, GKVK, Bengaluru, 560065, India
| | - Ramu S Vemanna
- Laboratory of Plant Functional Genomics, Regional Centre for Biotechnology, Faridabad-Gurgaon Expressway, NCR Biotech Science Cluster, 3rd Milestone, Faridabad, Haryana, 121 001, India.
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21
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Da Costa MVJ, Ramegowda V, Ramakrishnan P, Nataraja KN, Sheshshayee MS. Comparative metabolite profiling of rice contrasts reveal combined drought and heat stress signatures in flag leaf and spikelets. Plant Sci 2022; 320:111262. [PMID: 35643604 DOI: 10.1016/j.plantsci.2022.111262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 02/04/2022] [Accepted: 03/19/2022] [Indexed: 06/15/2023]
Abstract
Under semi-irrigated ecosystem, rice is often exposed to a combination of drought and heat stress, especially at the reproductive stage, leading to substantial yield loss. Combined stress studies are very limited in rice partly due to the difficulty in creating heat stress on a larger scale. Here, 24 cultivars with specific stress adaptive traits were phenotyped for spikelet sterility under combined stress using the natural summer temperatures and open drought phenotyping facility, simulating the field conditions. LC-MS/MS based metabolite profiling was performed in flag leaves and spikelets of three cultivars contrasting for spikelet sterility and source (leaf weight) treated to drought, heat and combined stress. Constitutively regulated metabolites, metabolic signatures common to all stresses, cultivars and tissues, metabolites common to both the tissues across the stresses and cultivars and metabolites common to each cultivar across the tissues and stresses were identified. Under combined stress, metabolites differentially accumulated between cultivars contrasting for spikelet sterility but similar for source and cultivars contrasting for both spikelet sterility and source have been identified. These metabolites would serve as markers towards improving combined stress tolerance of rice.
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Affiliation(s)
| | - Venkategowda Ramegowda
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore 560065 India.
| | - Padma Ramakrishnan
- Metabolomics Facility, Centre for Cellular and Molecular Platforms, GKVK, Bangalore 560065 India
| | - Karaba N Nataraja
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore 560065 India
| | - M Sreeman Sheshshayee
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore 560065 India
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22
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Goussi R, Manfredi M, Marengo E, Derbali W, Cantamessa S, Barbato R, Manaa A. Thylakoid proteome variation of Eutrema salsugineum in response to drought and salinity combined stress. Biochim Biophys Acta Bioenerg 2021; 1862:148482. [PMID: 34418359 DOI: 10.1016/j.bbabio.2021.148482] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 07/30/2021] [Accepted: 08/16/2021] [Indexed: 11/19/2022]
Abstract
It is well known that plant responses to stress involve different events occurring at different places of the cell/leaf and at different time scales in relation with the plant development. In fact, the organelles proteomes include a wide range of proteins that could include a wide range of proteins showing a considerable change in cellular functions and metabolism process. On this basis, a comparative proteomics analysis and fluorescence induction measurements were performed to investigate the photosynthetic performance and the relative thylakoid proteome variation in Eutrema salsugineum cultivated under salt stress (200 mM NaCl), water deficit stress (PEG) and combined treatment (PEG + NaCl) as a hyperosmotic stress. The obtained results showed a significant decrease of plant growth under drought stress conditions, with the appearance of some toxicity symptoms, especially in plants subjected to combined treatment. Application of salt or water stress alone showed no apparent change in the chlorophyll a fluorescence transients, primary photochemistry (fluorescence kinetics of the O-J phase), the PQ pool state (J-I phase changes), (Fv/Fm) and (Fk/Fj) ratios. However, a considerable decrease of all these parameters was observed under severe osmotic stress (PEG + NaCl). The thylakoid proteome analysis revealed 58 proteins showing a significant variation in their abundance between treatments (up or down regulation). The combined treatment (PEG + NaCl) induced a decrease in the expression of the whole PSII core subunit (D1, D2, CP43, CP47, PsbE and PsbH), whereas the OEC subunits proteins remained constant. An increase in the amount of PsaD, PsaE, PsaF, PsaH, PsaK and PsaN was detected under drought stress (PEG5%). No significant change in the accumulation of Cyt b6 and Cyt f was observed. Some regulated proteins involved in cellular redox homeostasis were detected (glutamine synthetase, phosphoglycerate kinase, transketolase), and showed a significant decrease under the combined treatment. Some oxidative stress related proteins were significantly up-regulated under salt or drought stress and could play a crucial role in the PSI photoprotection and the control of ROS production level.
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Affiliation(s)
- Rahma Goussi
- Laboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, B.P. 901, Hammam-Lif 2050, Tunisia; Faculté des Sciences de Tunis, Université Tunis El Manar, 2092, Tunisia; Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Teresa Michel 11, 15121 Alessandria, Italy
| | - Marcello Manfredi
- Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy; Center for Translational Research on Autoimmune & Allergic Diseases - CAAD, University of Piemonte Orientale, Novara, Italy
| | - Emilio Marengo
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Teresa Michel 11, 15121 Alessandria, Italy
| | - Walid Derbali
- Laboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, B.P. 901, Hammam-Lif 2050, Tunisia; Faculté des Sciences de Tunis, Université Tunis El Manar, 2092, Tunisia
| | - Simone Cantamessa
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Teresa Michel 11, 15121 Alessandria, Italy; CREA - Research Centre for Forestry and Wood - Italy
| | - Roberto Barbato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, viale Teresa Michel 11, 15121 Alessandria, Italy
| | - Arafet Manaa
- Laboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, B.P. 901, Hammam-Lif 2050, Tunisia.
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23
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Ergo VV, Veas RE, Vega CRC, Lascano R, Carrera CS. Leaf photosynthesis and senescence in heated and droughted field-grown soybean with contrasting seed protein concentration. Plant Physiol Biochem 2021; 166:437-447. [PMID: 34157606 DOI: 10.1016/j.plaphy.2021.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 06/06/2021] [Indexed: 06/13/2023]
Abstract
Soybean plants under heat and drought generate a multiplicity of responses in photosynthesis and senescence, impairing growth, yield, and seed quality. The goal of this study was to analyze and quantify independent and combined effects of heat and drought during seed filling on photosynthesis and senescence, and its subsequent effects on the filling duration in soybean genotypes contrasting on seed protein. Two field experiments were conducted using high and low seed protein genotypes. During seed filling plants were exposed to four treatments: control (ambient temperature and soil water content near field capacity), heat stress (HS, episodes above 32 °C 6 h d-1) during 15-d, drought stress (DS, soil water content ≤ 25% of field capacity) during the entire seed filling, and HS × DS. We found non-genotypic variation in leaf photosynthesis in both experiments. Irrigated HS, did no alter photosynthesis and senescence. Drought, regardless of heat, reduced photosynthesis, carbohydrate production and affected membranes integrity, leading to premature leaf senescence and shortening the filling duration. The magnitude of responses was similar between drought alone and stresses combined, indicating a dominant role of drought over heat. The seed filling duration was not shorter in high protein compared to low protein genotype, nor was senescence pattern altered across treatments. These results indicated that the higher seed protein content exhibited by some genotypes are not necessarily associated with an earlier onset of senescence and shortening of the filling period as suggested by previous studies analyzing genotypes differing in protein concentration.
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Affiliation(s)
- Verónica V Ergo
- Unidad de Estudios Agropecuarios (UDEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto Nacional de Tecnología Agropecuaria (INTA), Córdoba, Camino 60 cuadras km 5.5, 5119, Argentina; CONICET, Argentina.
| | - Rodolfo E Veas
- Unidad de Estudios Agropecuarios (UDEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto Nacional de Tecnología Agropecuaria (INTA), Córdoba, Camino 60 cuadras km 5.5, 5119, Argentina
| | - Claudia R C Vega
- INTA Estación Experimental Manfredi, Manfredi, Córdoba, Ruta Nacional N 9 Km 636, 5988, Argentina
| | - Ramiro Lascano
- Unidad de Estudios Agropecuarios (UDEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto Nacional de Tecnología Agropecuaria (INTA), Córdoba, Camino 60 cuadras km 5.5, 5119, Argentina; CONICET, Argentina; Cátedra de Fisiología Vegetal (FCEFyN-UNC), Vélez Sarsfield 299, Córdoba, 5000, Argentina
| | - Constanza S Carrera
- Unidad de Estudios Agropecuarios (UDEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto Nacional de Tecnología Agropecuaria (INTA), Córdoba, Camino 60 cuadras km 5.5, 5119, Argentina; CONICET, Argentina.
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24
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Suszek-Łopatka B, Maliszewska-Kordybach B, Klimkowicz-Pawlas A, Smreczak B. The multifactorial assessment of the Zn impact on high and low temperature stress towards wheat seedling growth under diverse moisture conditions (optimal and wet) in three soils. J Hazard Mater 2021; 416:126087. [PMID: 34492901 DOI: 10.1016/j.jhazmat.2021.126087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/20/2021] [Accepted: 05/08/2021] [Indexed: 06/13/2023]
Abstract
Anthropogenic activities leading to chemical contamination of soil and global climate change may increase the level of stress for plants. Recent decades studies (mainly two-factors) have reported that the ecotoxicity of soil contaminants could be modified by climate factors. To date, little is known about: the combined climate-chemical stress on plants; the interaction of chemicals with high soil moisture conditions; the impact of soil properties on the combined climate-chemical stress and questions regarding the response of organisms to combined effect of all key factors influencing the ecotoxicity of chemicals under field conditions remain unanswered. Our study sought to fill the knowledge gap on the multifactorial interaction of four main factors encounter in polluted areas (soil chemical contamination: heavy metal (Zn); temperature: 10, 23, 35 °C, moisture: 55, 80%WHC; soil properties). The assessment of combined effect of multiple stressors based on the multiple ANCOVA model (n = 108; adjusted R2 = 0.68) and calculated indicators showed: 1) all studied factors significantly interacted and influenced the phytotoxic effect of Zn; 2) Zn modified the plant response to temperature stress depending on moisture conditions and soil properties. This study improves methods for assessing the hazardous effects of soil chemical contamination in the real environment.
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Affiliation(s)
- Beata Suszek-Łopatka
- Institute of Soil Science and Plant Cultivation - State Research Institute (IUNG-PIB), Czartoryskich 8, 24-100 Pulawy, Poland.
| | - Barbara Maliszewska-Kordybach
- Institute of Soil Science and Plant Cultivation - State Research Institute (IUNG-PIB), Czartoryskich 8, 24-100 Pulawy, Poland.
| | - Agnieszka Klimkowicz-Pawlas
- Institute of Soil Science and Plant Cultivation - State Research Institute (IUNG-PIB), Czartoryskich 8, 24-100 Pulawy, Poland.
| | - Bożena Smreczak
- Institute of Soil Science and Plant Cultivation - State Research Institute (IUNG-PIB), Czartoryskich 8, 24-100 Pulawy, Poland.
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25
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Öztürk Gökçe ZN, Aksoy E, Bakhsh A, Demirel U, Çalışkan S, Çalışkan ME. Combined drought and heat stresses trigger different sets of miRNAs in contrasting potato cultivars. Funct Integr Genomics 2021; 21:489-502. [PMID: 34241734 DOI: 10.1007/s10142-021-00793-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 05/31/2021] [Accepted: 06/08/2021] [Indexed: 12/17/2022]
Abstract
MicroRNAs are small, non-coding RNAs that are responsible for regulation of gene expression during plant growth and development. Although there are many studies on miRNAs in other plants, little work has been done to understand the role of miRNAs in abiotic stress tolerance in potatoes. This study investigates changes in miRNA profiles of two different potato cultivars (tolerant, Unica and susceptible, Russet Burbank) in response to heat, drought and their combination. Transcriptomic studies revealed that miRNA profiles depend on the susceptibility and tolerance of the cultivar and also the stress conditions. Large number of miRNAs were expressed in Unica, whereas Russet Burbank indicated lesser number of changes in miRNA expression. Physiological and transcriptional results clearly supported that Unica cultivar is tolerant to combined drought and heat stress compared to Russet Burbank. Moreover, psRNATarget analysis predicted that major miRNAs identified were targeting genes playing important roles in response to drought and heat stress and their important roles in genetic and post-transcriptional regulation, root development, auxin responses and embryogenesis were also observed. This study focused on eight miRNAs (Novel_8, Novel_9, Novel_105, miR156d-3p, miR160a-5p, miR162a-3p, miR172b-3p and miR398a-5p) and their putative targets where results indicate that they may play a vital role at different post-transcriptional levels against drought and heat stresses. We suggest that miRNA overexpression in plants can lead to increased tolerance against abiotic stresses; furthermore, there should be more emphasis on the studies to investigate the role of miRNAs in combined abiotic stress in plants.
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Affiliation(s)
- Zahide Neslihan Öztürk Gökçe
- Ayhan Şahenk Faculty of Agricultural Sciences and Technologies, Department of Agricultural Genetic Engineering, Niğde Ömer Halisdemir University, 51240, Niğde, Turkey.
| | - Emre Aksoy
- Ayhan Şahenk Faculty of Agricultural Sciences and Technologies, Department of Agricultural Genetic Engineering, Niğde Ömer Halisdemir University, 51240, Niğde, Turkey
| | - Allah Bakhsh
- Ayhan Şahenk Faculty of Agricultural Sciences and Technologies, Department of Agricultural Genetic Engineering, Niğde Ömer Halisdemir University, 51240, Niğde, Turkey
| | - Ufuk Demirel
- Ayhan Şahenk Faculty of Agricultural Sciences and Technologies, Department of Agricultural Genetic Engineering, Niğde Ömer Halisdemir University, 51240, Niğde, Turkey
| | - Sevgi Çalışkan
- Ayhan Şahenk Faculty of Agricultural Sciences and Technologies, Department of Agricultural Genetic Engineering, Niğde Ömer Halisdemir University, 51240, Niğde, Turkey
| | - Mehmet Emin Çalışkan
- Ayhan Şahenk Faculty of Agricultural Sciences and Technologies, Department of Agricultural Genetic Engineering, Niğde Ömer Halisdemir University, 51240, Niğde, Turkey
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26
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Olivera Viciedo D, de Mello Prado R, Martinez CA, Habermann E, de Cássia Piccolo M, Calero Hurtado A, Barreto RF, Peña Calzada K. Changes in soil water availability and air-temperature impact biomass allocation and C:N:P stoichiometry in different organs of Stylosanthes capitata Vogel. J Environ Manage 2021; 278:111540. [PMID: 33126195 DOI: 10.1016/j.jenvman.2020.111540] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 09/19/2020] [Accepted: 10/19/2020] [Indexed: 05/25/2023]
Abstract
Temperature and soil water availability play important roles in the biogeochemical cycles of essential elements for plant growth, such as carbon (C), nitrogen (N), and phosphorus (P). In this study, we investigated how drought and warming impact C:N:P stoichiometric ratios of different plant organs (leaves, inflorescences, and stems), and biomass allocation and production of a field-grown pasture of Stylosanthes capitata, a tropical forage legume. We evaluated the effects of elevated temperature (+2 °C above ambient temperature) under two conditions of soil water availability, irrigated, and non-irrigated. In general, we observed that different functional plant organs showed distinct responses to drought and warming demonstrating how important is to evaluate different functional plant organs to unravel crop nutrient dynamics. In addition, interactive effects between warming and drought were observed in many situations, highlighting the importance of multifactorial studies. Our data showed that warming produced plants with more inflorescences, decreasing leaf:inflorescence ratio. However, only warming under well-watered conditions improved biomass production (in 38%). Warmed and irrigated plants showed higher stoichiometric homeostasis compared to other treatments. In an opposite direction, drought decreased P concentration and increased N:P ratios in different organs, reducing the stoichiometric homeostasis under both conditions of temperature. We have concluded that warm and well-watered conditions without restrictions in soil nutrient availability can enhance plant production, presumably due to a higher level of stoichiometric homeostasis.
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Affiliation(s)
- Dilier Olivera Viciedo
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Jaboticabal, São Paulo, Brazil.
| | - Renato de Mello Prado
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Jaboticabal, São Paulo, Brazil
| | | | - Eduardo Habermann
- Department of Biology, University of São Paulo, Ribeirão Preto (FFCLRP), São Paulo, Brazil
| | | | - Alexander Calero Hurtado
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Jaboticabal, São Paulo, Brazil
| | - Rafael Ferreira Barreto
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Jaboticabal, São Paulo, Brazil
| | - Kolima Peña Calzada
- São Paulo State University (UNESP), School of Agricultural and Veterinarian Sciences, Jaboticabal, São Paulo, Brazil
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27
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Li ZH, Li P, Wu Y. Effects of temperature fluctuation on endocrine disturbance of grass carp Ctenopharyngodon idella under mercury chloride stress. Chemosphere 2021; 263:128137. [PMID: 33297125 DOI: 10.1016/j.chemosphere.2020.128137] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/31/2020] [Accepted: 08/23/2020] [Indexed: 06/12/2023]
Abstract
Mercury (Hg) is considered to be one of the most toxic and ubiquitously distributed metals in the aquatic system. Meanwhile, the temperature increase of water bodies due to global climatic changes, may affect ecosystems through alterations of the metal properties or by affecting the susceptibility of organisms. To study the physiological stress of mercury chloride on grass carp Ctenopharyngodon idella at different temperatures, we investigated the effects of water temperature and/or mercury chloride (HgCl2) on growth performance (SGR-the specific growth rate, HSI-hepato-somatic index, CF-condition factor) and the thyroid hormones levels (T3-triiodothyronine; T4-thyroxine), as well as the expression levels of related genes involved growth and hypothalamus-pituitary-thyroid (HPT) axis. Fish (45.37 ± 3.58 g) were acclimated to 15, 20, 25, 30 or 35 °C and co-exposed to 0.0 or 0.039 mg/L HgCl2 for 4 weeks in triplicates. Three-way ANOVA revealed that all variables were significantly affected by water temperature, HgCl2 exposure, exposure time and their interactions. It was found that fish reared in Hg-free group at 25 °C showed the optimum growth. Otherwise, T4 concentrations were decreased, while T3 levels remained constant following exposure to HgCl2, which was explained by the up-regulation of the dio2 gene. Our data provide evidences that increased temperatures can potentiate HgCl2 toxicity, but the exact mechanism of the effects of temperature coupled HgCl2 on fish is not full clear, which should be give more attention in future.
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Affiliation(s)
- Zhi-Hua Li
- Marine College, Shandong University, Weihai, Shandong, 264209, China; Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China.
| | - Ping Li
- Marine College, Shandong University, Weihai, Shandong, 264209, China.
| | - Yanhua Wu
- Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, 430223, China
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28
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Banerjee A, Roychoudhury A. Differential lead-fluoride and nickel-fluoride uptake in co-polluted soil variably affects the overall physiome in an aromatic rice cultivar. Environ Pollut 2021; 268:115504. [PMID: 33157395 DOI: 10.1016/j.envpol.2020.115504] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/24/2020] [Accepted: 08/21/2020] [Indexed: 06/11/2023]
Abstract
The present study aimed to show that nickel and fluoride exhibited synchronized co-inhibited uptake in the aromatic rice cultivar, Gobindobhog, since bioaccumulation of the two elements was lower than that during individual stress, so that overall growth under combined stress was similar to control seedlings. On the contrary, lead and fluoride stimulated their co-uptake which triggered oxidative damages, NADPH oxidase activity, methylglyoxal accumulation, photosynthetic inhibition, membrane-protein damages, necrosis and genomic template degradation. Accumulation of proline, anthocyanins, non-protein thiols and phytochelatins was stimulated for systemic protection against reactive oxygen species (ROS) and xenobiotic-mediated injuries during lead-fluoride toxicity. ROS accumulation during nickel-fluoride stress was insignificant due to which enhanced accumulation of most antioxidants was not required. Glutathione depletion during combined lead-fluoride toxicity was due to its utilization in the glyoxalase cycle and also inhibition of glutathione reductase. However, the nickel-fluoride-treated sets maintained glutathione reserves and glyoxalase activity similar to those in control. Presence of fluoride 'safeguarded' the glutathione-utilizing enzymes like glutathione reductase, glutathione peroxidase and glutathione-S-transferase during dual lead-fluoride stress. This was because these enzymes showed higher activity compared to that under lead toxicity alone. Enzymatic antioxidants like superoxide dismutase, ascorbate peroxidase and guaiacol peroxidase were activated during lead-fluoride toxicity due to altered iron and copper homeostasis. Catalase activity was strongly inhibited, resulting in the inability to scavenge H2O2 and suppression of the fluoride-adaptable phenotype. However, none of the enzymatic antioxidants were inhibited during nickel-fluoride stress, which cumulatively allowed the seedlings to maintain normal physiology. Overall our findings holistically reveal the physiological plasticity of Gobindobhog in response to two different heavy metals under the influence of fluoride.
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Affiliation(s)
- Aditya Banerjee
- Post Graduate Department of Biotechnology, St. Xavier's College (Autonomous), 30, Mother Teresa Sarani, Kolkata, 700016, West Bengal, India
| | - Aryadeep Roychoudhury
- Post Graduate Department of Biotechnology, St. Xavier's College (Autonomous), 30, Mother Teresa Sarani, Kolkata, 700016, West Bengal, India.
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29
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Kim SH, Che CA, Jeong GT, Kim SK. The effect on single and combined stresses for biomass and lipid production from Nannochloris atomus using two phase culture system. J Biotechnol 2020; 326:40-47. [PMID: 33359212 DOI: 10.1016/j.jbiotec.2020.12.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 11/11/2020] [Accepted: 12/13/2020] [Indexed: 10/22/2022]
Abstract
The optimal conditions for high biomass and lipid production from Nannochloris atomus were evaluated. The parameters used in this study were light emitting diode (LED) wavelength mixing ratio, the photoperiod, salinity tolerance, and single and combined stresses. Biomass production was monitored in the first phase using red LED (625 nm), followed by lipid production by green LED (520 nm) in the second phase. The optimal conditions were obtained using a single red LED with light:dark durations of 20:4 h and two days of exposure in combined stresses of 1.06 M NaCl and green LED. Under these conditions, 68.6 % (w/w) lipid content were obtained. Compared to the non-stress control, the lipid content was increased by 31.9 %. Linolenic acid (C18:3) the omega-3 fatty acid was produced up to 52.4 % in 1.06 M NaCl as a single stress.
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Affiliation(s)
- So Hee Kim
- School of Marine, Fisheries, and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Clovis Awah Che
- School of Marine, Fisheries, and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Gwi-Taek Jeong
- School of Marine, Fisheries, and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Sung-Koo Kim
- School of Marine, Fisheries, and Life Science, Pukyong National University, Busan 48513, Republic of Korea.
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Ngoupaye GT, Yassi FB, Bahane DAN, Pahaye DB, Ngo Bum E. Antidepressant and anti-amnesic effects of the aqueous lyophilisate of the leaves of Leptadenia arborea on an animal model of cognitive deficit associated depression. Biomed Pharmacother 2020; 130:110603. [PMID: 34321164 DOI: 10.1016/j.biopha.2020.110603] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 07/25/2020] [Accepted: 08/02/2020] [Indexed: 12/28/2022] Open
Abstract
Leptadenia arborea (Asclepiadaceae) is a plant used in traditional medicine to treat syphilis, migraine, and mental illnesses. The aim of our study was to investigate possible antidepressant and anti-amnesic effects of the aqueous lyophilisate of the leaves of Leptadenia arborea in an animal model of cognitive deficit associated depression. Swiss albino adult mice of both sexes were used for this study. A 14-day combined stress model was used to induce depression with early cognitive deficits. The forced swimming test, the open field test and plasma corticosterone level were used to assess antidepressant-like effect. The novel object recognition task (NORT), the Morris Water Maze (MWM) and neurochemical analysis of hippocampal acetylcholinesterase activity was also carried out to assess memory integrity. The aqueous lyophelisate of L. arborea increased swimming time and decreased immobility time in the forced swimming test. In the open field test they was no difference in the number of lines crossed between groups, and the lyophilisate-treated mice spent more time in the centre compared to the control. The lyophilisate decreased the plasma level of corticosterone compared to the control. The lyophilisate decreased the latency to reach the hidden platform and increased the time spent in the target quadrant in the MWM. The lyophilisate also increased the time of exploration of the novel object in the NORT and decreased the acetylcholinesterase activity in the hippocampus. L. arborea effects were decreased when it was co-administered with pCPA. Results suggest that the aqueous lyophilisate of the leaves of L. arborea possess antidepressant-like and anti-amnesic effects.
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Sruthi P, Puthur JT. High NaCl tolerance potential of Bruguiera cylindrica (L.) Blume compromised by mild CuSO 4 concentration as evidenced by unique physiochemical features. Mar Pollut Bull 2020; 156:111260. [PMID: 32510402 DOI: 10.1016/j.marpolbul.2020.111260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 04/29/2020] [Accepted: 05/08/2020] [Indexed: 06/11/2023]
Abstract
Differential response of Bruguiera cylindrica to individual (CuSO4) and combined (CuSO4 NaCl) effect was evaluated. The plantlets were treated with control, 0.15 mM CuSO4, 400 mM NaCl and 0.15 mM CuSO4 + 400 mM NaCl. Under combined stress, higher accumulation of Cu in the roots indicate that the roots are the primary site of Cu accumulation and thus the plant perform as an excluder and photosynthetic efficiency reduced drastically and significant enhancement in the superoxide and hydroxyl free radicals which increase membrane lipid peroxidation, leading to cellular damage and destruction. As evidenced from SEM-EDXMA, increase in Cu and Na+ levels in xylem and pith regions of leaf and stem and the presence of deeply stained structures, denoting the probable formation of complex containing the metal. Increased CaOx crystal forming cells (crystal idioblasts) reveals the regulation of bioaccumulated Cu and Na+ by complexing with CaOx. Thus the study suggested that, 400 mM NaCl and 0.15 mM CuSO4 treatments does not have negative impact on plant growth, the NaCl tolerance potential compromised in the presence of mild CuSO4 concentration during combined stress.
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Affiliation(s)
- Palliyath Sruthi
- Plant Physiology and Biochemistry Division, Department of Botany, University of Calicut, C.U. Campus P.O., Kerala 673635, India
| | - Jos T Puthur
- Plant Physiology and Biochemistry Division, Department of Botany, University of Calicut, C.U. Campus P.O., Kerala 673635, India.
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Hao L, Chen L, Zhu P, Zhang J, Zhang D, Xiao J, Xu Z, Zhang L, Liu Y, Li H, Yang H, Cao G. Sex-specific responses of Populus deltoides to interaction of cadmium and salinity in root systems. Ecotoxicol Environ Saf 2020; 195:110437. [PMID: 32193020 DOI: 10.1016/j.ecoenv.2020.110437] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 03/02/2020] [Accepted: 03/03/2020] [Indexed: 06/10/2023]
Abstract
More research about branch order-specific accumulation of toxic ions in root systems is needed to know root branch-related responses in growth and physiology. In this study, we used Populus deltoides females and males as a model to detect sex-specific differences in physiology, biochemistry, ultrastructure of absorbing roots and distribution of toxic ions in heterogeneous root systems under Cd, salinity and combined stress. Healthy annual male and female plants of P. deltoides were cultivated in soils including 5 mg kg-1 of Cd, 0.2% (w/w) of NaCl and their combination for a growth season. Our results are mainly as follows: (1) females suffered more growth inhibition, root biomass decline, root viability depression, and damage to distal root cells, but lower ability to scavenge reactive oxygen species (ROS) than the males under all stresses; (2) In both sexes, salinity adopted in the present study caused more significant negative effects on growth and organelles integrity than Cd stress, while interaction treatment did not induced a further depression in growth or more impairments in root cells of both sexes in comparison to salinity, indicating influence of combined stress was not equal simply to a superposition of the effects caused by single factors; (3) Cd and Na accumulation in root systems is highly heterogeneous and branch order-specific, with lower-order roots containing more Cd2+ but less Na+, and higher-order roots accumulating more Na+ but less Cd2+. Besides, it is noteworthy that females accumulated more Cd2+ in 1-2 order roots and more Na+ in 1-3 order roots than males under the interaction treatment. These results indicated that strategies in toxic ions accumulation in heterogeneous root systems of P. deltoides was highly branch order-specific, and may closely correlate with sex-specific root growth and physiological responses to the interaction of Cd and salinity.
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Affiliation(s)
- Linting Hao
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Lianghua Chen
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China.
| | - Peng Zhu
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Jian Zhang
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Danju Zhang
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Jiujin Xiao
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Zhenfeng Xu
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Li Zhang
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Yang Liu
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Han Li
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Hanbo Yang
- Institute of Ecological Forestry, Sichuan Agricultural University, Chengdu, 611130, China; Forestry Ecological Engineering in the Upper Reaches of Yangtze River Key Laboratory of Sichuan Province, Chengdu, 611130, China
| | - Guoxing Cao
- College of Forestry, Sichuan Agricultural University, Chengdu, 611130, China
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Bao G, Tang W, An Q, Liu Y, Tian J, Zhao N, Zhu S. Physiological effects of the combined stresses of freezing-thawing, acid precipitation and deicing salt on alfalfa seedlings. BMC Plant Biol 2020; 20:204. [PMID: 32393175 PMCID: PMC7216480 DOI: 10.1186/s12870-020-02413-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 04/28/2020] [Indexed: 05/05/2023]
Abstract
BACKGROUND Frequent freeze-thaw phenomena, together with widely used deicing salt and intense acid precipitation, often occur in northeastern China, causing damage to various aspects of plants, such as the permeability of biological membranes, osmotic adjustment, and photosystems. Aiming to explore the resistance of alfalfa to freezing-thawing (F), acid precipitation (A) and deicing salt (D), this study used Medicago sativa cv. Dongmu-70 as the experimental material, and the contents of malondialdehyde (MDA), soluble protein, soluble sugars, proline and chlorophyll were evaluated. RESULTS As the temperature decreased, the MDA content in the seedlings of the group under combined stress (A-D-F) increased and was significantly higher than that of group F (by 69.48 ~ 136.40%). Compared with those in the control (CK) group, osmotic substances such as soluble sugars and proline in the treatment groups were higher, while the soluble protein content was lower. The chlorophyll contents in the seedlings of the treatment groups were lower than those of the CK group; however, the chlorophyll content displayed a non-significant change during the free-thaw cycle. CONCLUSION Injury to the permeability of the biological membranes and photosystems of alfalfa results from stress. Moreover, alfalfa maintains osmotic balance by adaptively increasing the potential of osmotic substances such as soluble sugars and proline. Furthermore, the influence of stress from freezing-thawing and deicing salt is highly substantial, but the combined stresses of acid precipitation with the two factors mentioned above had little effect on the plants.
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Affiliation(s)
- Guozhang Bao
- Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of New Energy and Environment, Jilin University, Changchun, 130012, China.
| | - Wenyi Tang
- Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Qirui An
- Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Yaoxin Liu
- Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Jiaqi Tian
- Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Nan Zhao
- Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of New Energy and Environment, Jilin University, Changchun, 130012, China
| | - Saning Zhu
- Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of New Energy and Environment, Jilin University, Changchun, 130012, China
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Souguir D, Hörmann G, Hachicha M. Salinity decreases cadmium accumulation in Vicia faba. Environ Sci Pollut Res Int 2020; 27:18893-18901. [PMID: 32207023 DOI: 10.1007/s11356-020-08396-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/29/2019] [Indexed: 06/10/2023]
Abstract
The study investigates the effect of cadmium (Cd), salinity (NaCl), and combined stress on rhizosphere pH, growth parameters, membrane leakage, and genotoxicity in Vicia faba. Germinated seeds were exposed for 48 h to 0.01 mM Cd(NO3)2 (Cd), 50 mM NaCl (S50), 150 mM NaCl (S150), and Cd-NaCl (CdS50 and CdS150). An accumulation of Cd and Na was found essentially in Vicia roots under each single stress factor associated with variations in rhizosphere pH. Additional NaCl in metallic solution significantly dropped the rhizosphere pH and decreased Cd concentrations in roots by 2.3 and 3.8 times for CdS50 and CdS150, respectively. Growth parameters (root length and fresh and dry matters), mitotic activity, and micronucleus formation were not influenced by Cd and low concentration of NaCl when applied separately or together, while 150 mM of NaCl, alone or combined with Cd, affected negatively all the studied parameters, as well as chromosome and nucleus stability. V. faba seems to reduce the transport of Cd in saline conditions and therefore salinity (50 mM) may act as a protection against Cd accumulation.
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Affiliation(s)
- Dalila Souguir
- Institut National de Recherches en Génie Rural, Eaux et Forêts (INRGREF), Université de Carthage, 10 Rue Hédi Karray, Manzeh IV, 2080, Ariana, Tunisia.
| | - Georg Hörmann
- Department of Hydrology and Water Resources Management, Institute for Natural Resource Conservation, Kiel University, Olshausenstr 75, Kiel 24118, Germany
| | - Mohamed Hachicha
- Institut National de Recherches en Génie Rural, Eaux et Forêts (INRGREF), Université de Carthage, 10 Rue Hédi Karray, Manzeh IV, 2080, Ariana, Tunisia
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Loka DA, Oosterhuis DM, Baxevanos D, Noulas C, Hu W. Single and combined effects of heat and water stress and recovery on cotton (Gossypium hirsutum L.) leaf physiology and sucrose metabolism. Plant Physiol Biochem 2020; 148:166-179. [PMID: 31962205 DOI: 10.1016/j.plaphy.2020.01.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/12/2020] [Accepted: 01/12/2020] [Indexed: 05/18/2023]
Abstract
High temperatures and water-deficit stress limit cotton production around the world. Their individual effects on plant physiology and metabolism have been extensively studied, however, their combination has received considerably less attention. To that end, growth chamber experiments were conducted using cotton (Gossypium hirsutum L.) cultivar ST5288B2F and the objectives were to discern physiological and metabolic alterations after heat and water stress application (single or combined) and recovery, during cotton's vegetative stage. Under water stress conditions, leaf physiological parameters were suppressed and changes in carbohydrate levels, due to alterations in sucrose-metabolizing enzymes activities, were observed. Heat stress alone increased carbohydrate content, and activities of sucrose-degrading enzymes, while leaf physiology remained unaffected. The combined stress did exacerbate decreases in leaf water potential and soluble acid invertase activity, but the rest of the responses were similar to those of water stress. After stress alleviation, leaf physiological parameters of water-stressed plants did not manage to recover and substantial decreases were observed in leaf starch levels and activities of sucrose-cleaving enzymes, while the majority of parameters of heat-shocked plants returned to control levels. Recovery of the plants subjected to the combined stress was comparable to that of water-stressed plants, but significant differences were observed in carbohydrate levels and sucrose synthase activity. Our study demonstrated that under combined stress and post-stress conditions, water stress was the dominant factor affecting cotton leaf physiology and sucrose metabolism, highlighting however, the unique responses of some traits that could not be deduced from the additive effects of the single stresses.
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Affiliation(s)
- Dimitra A Loka
- Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72704, USA; Institute of Industrial and Forage Crops, Hellenic Agricultural Organization, Larissa, 41335, Greece
| | - Derrick M Oosterhuis
- Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72704, USA
| | - Dimitrios Baxevanos
- Institute of Industrial and Forage Crops, Hellenic Agricultural Organization, Larissa, 41335, Greece
| | - Christos Noulas
- Institute of Industrial and Forage Crops, Hellenic Agricultural Organization, Larissa, 41335, Greece
| | - Wei Hu
- College of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu Province, 210095, PR China; Department of Crop, Soil and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72704, USA.
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Zhou R, Yu X, Zhao T, Ottosen CO, Rosenqvist E, Wu Z. Physiological analysis and transcriptome sequencing reveal the effects of combined cold and drought on tomato leaf. BMC Plant Biol 2019; 19:377. [PMID: 31455231 PMCID: PMC6712725 DOI: 10.1186/s12870-019-1982-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 08/19/2019] [Indexed: 05/18/2023]
Abstract
BACKGROUND Co-occurrence of cold and drought stress can alter the response of plants at morphological, physiological and molecular levels, which finally affect crop production, more than individual stress. Understanding the responses of crop to combined stress is necessary to improve tolerance and maintain crop production especially in the field where combined stress frequently occurs. We aimed to clarify the underlying leaf physiological and molecular mechanisms of tomato by imposing combining cold and drought on one popular tomato cultivar 'Jinlingmeiyu' as an example. RESULTS The physiological and genetic responses were identified in tomatoes after 42 h exposure to control, cold, drought and combined treatments. As compared with control, water loss rate at the three stresses including cold, drought and combined stress significantly decreased until 40 min after taking samples from the plants. The content of H2O2, zeatin riboside (ZR) and melatonin in all stress treatments were significantly higher than the control. Drought stress alone and combined stress induced the accumulation of abscisic acid (ABA) and auxin (IAA) as compared with control. The individual cold and combined stress significantly decreased the maximum quantum efficiency of PSII (Fv/Fm), quantum yield of PSII (Fq'/Fm') and electron transport rate (ETR). In total, 7141, 1850 and 7841 genes were involved in the stress response to cold, drought and their combination. Functional analysis of the stress-inducible genes provided more insights concerning the complex regulatory mechanisms that were involved in combined stress. The expression level of 12 genes were validated by quantitative real-time PCR (qRT-PCR). CONCLUSIONS We found that the expression of stress-specific genes changed with physiological variation, indicating the close crosstalk between physiological and genetic response especially under combined stress. This study provides new knowledge on the complex regulatory mechanism genes in tomato ('Jinlingmeiyu') leaf to abiotic stresses.
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Affiliation(s)
- Rong Zhou
- Department of Food Science, Aarhus University, Årslev, Denmark.
- Laboratory for Genetic Improvement of High Efficiency Horticultural Crops in Jiangsu Province, Institute of Vegetable Crop, Jiangsu Province Academy of Agricultural Sciences, Nanjing, Jiangsu, China.
| | - Xiaqing Yu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Tongmin Zhao
- Laboratory for Genetic Improvement of High Efficiency Horticultural Crops in Jiangsu Province, Institute of Vegetable Crop, Jiangsu Province Academy of Agricultural Sciences, Nanjing, Jiangsu, China
| | | | - Eva Rosenqvist
- Department of Plant and Environmental Sciences, University of Copenhagen, Taastrup, Denmark
| | - Zhen Wu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
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Wolinska KW, Berens ML. Optimal Defense Theory 2.0: tissue-specific stress defense prioritization as an extra layer of complexity. Commun Integr Biol 2019; 12:91-95. [PMID: 31308873 PMCID: PMC6615527 DOI: 10.1080/19420889.2019.1625661] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 05/21/2019] [Indexed: 12/21/2022] Open
Abstract
In nature, plants need to be able to quickly adapt to changing environments during their lifetime in order to maintain fitness. Different defense responses are not only costly, but often also antagonistic to one another. Hence, when faced with multiple stresses simultaneously, plants likely have to prioritize their defense responses. This type of crosstalk between different stress response pathways is suggested to balance the high costs of triggering and maintaining stress responses with the limited amount of resources available to a plant. This assumption is in accordance with the optimal defense theory (ODT), which states that living organisms put more resources into protection of the most valuable tissues, but does not explain how plants survive combined stress conditions in nature. In this review, we describe recent evidence that expands on the framework of the ODT by suggesting that under combined stress plants spatially separate contrasting stress responses, rather than protecting the most valuable tissues to simultaneously protect themselves from contrasting stressors. We discuss the implications of these findings for understanding plant responses to combined stresses and suggest potentially fruitful avenues for further research.
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Affiliation(s)
- Katarzyna Wiktoria Wolinska
- Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research, Cologne, Germany
| | - Matthias Leonhard Berens
- Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research, Cologne, Germany
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Osthoff A, Donà Dalle Rose P, Baldauf JA, Piepho HP, Hochholdinger F. Transcriptomic reprogramming of barley seminal roots by combined water deficit and salt stress. BMC Genomics 2019; 20:325. [PMID: 31035922 PMCID: PMC6489292 DOI: 10.1186/s12864-019-5634-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 03/21/2019] [Indexed: 12/21/2022] Open
Abstract
Background Water deficit and soil salinity substantially influence plant growth and productivity. When occurring individually, plants often exhibit reduced growth resulting in yield losses. The simultaneous occurrence of these stresses enhances their negative effects. Unraveling the molecular mechanisms of combined abiotic stress responses is essential to secure crop productivity under unfavorable environmental conditions. Results This study examines the effects of water deficit, salinity and a combination of both on growth and transcriptome plasticity of barley seminal roots by RNA-Seq. Exposure to water deficit and combined stress for more than 4 days significantly reduced total seminal root length. Transcriptome sequencing demonstrated that 60 to 80% of stress type-specific gene expression responses observed 6 h after treatment were also present after 24 h of stress application. However, after 24 h of stress application, hundreds of additional genes were stress-regulated compared to the short 6 h treatment. Combined salt and water deficit stress application results in a unique transcriptomic response that cannot be predicted from individual stress responses. Enrichment analyses of gene ontology terms revealed stress type-specific adjustments of gene expression. Further, global reprogramming mediated by transcription factors and consistent over-representation of basic helix-loop-helix (bHLH) transcription factors, heat shock factors (HSF) and ethylene response factors (ERF) was observed. Conclusion This study reveals the complex transcriptomic responses regulating the perception and signaling of multiple abiotic stresses in barley. Electronic supplementary material The online version of this article (10.1186/s12864-019-5634-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Alina Osthoff
- Institute for Crop Science and Resource Conservation, Crop Functional Genomics, University of Bonn, 53113, Bonn, Germany
| | - Petra Donà Dalle Rose
- Institute for Crop Science and Resource Conservation, Crop Functional Genomics, University of Bonn, 53113, Bonn, Germany
| | - Jutta A Baldauf
- Institute for Crop Science and Resource Conservation, Crop Functional Genomics, University of Bonn, 53113, Bonn, Germany
| | - Hans-Peter Piepho
- Institute for Crop Science, Biostatistics Unit, University of Hohenheim, 70599, Stuttgart, Germany
| | - Frank Hochholdinger
- Institute for Crop Science and Resource Conservation, Crop Functional Genomics, University of Bonn, 53113, Bonn, Germany.
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El Aou-Ouad H, Bota J, Obata T, Montero R, Fernie AR, Medrano H, Pou A, Florez-Sarasa I. Combined drought and virus infection trigger aspects of respiratory metabolism related to grapevine physiological responses. J Plant Physiol 2018; 231:19-30. [PMID: 30212658 DOI: 10.1016/j.jplph.2018.08.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 08/24/2018] [Accepted: 08/27/2018] [Indexed: 06/08/2023]
Abstract
In the Mediterranean region, grapevines usually deal with drought during their summer growth season. Concurrently, grapevines are hosts to a large number of viruses from which grapevine leafroll associated virus-3 is one of the most widespread and provokes considerable economic losses in many vineyards. However, information concerning grapevine metabolic responses to the combination of drought and viral infection is scarce. Gas-chromatography coupled to mass-spectrometry based metabolite profiling was used in combination with growth analysis, viral loads and gas exchange data to perform an integrative study of the effects of individual and combined stress in two Majorcan grapevine varieties at two experimental years. Metabolic responses of both varieties to the combination of water stress and virus infection were specific and not predicted from the sum of single stress responses. Correlations between respiration, biomass and key metabolites highlight specific adjustments of respiratory and amino acid metabolism possibly underlying the maintenance of carbon balance and growth in grapevines under stress combination.
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Affiliation(s)
- Hanan El Aou-Ouad
- Grup de Recerca en Biologia de les Plantes en Condicions Mediterranies, Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa Km 7.5, 07122 Palma de Mallorca, Spain
| | - Josefina Bota
- Grup de Recerca en Biologia de les Plantes en Condicions Mediterranies, Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa Km 7.5, 07122 Palma de Mallorca, Spain
| | - Toshihiro Obata
- University of Nebraska Lincoln, 1901 Vine Street, Lincoln, 68588 NE, USA
| | - Rafael Montero
- Grup de Recerca en Biologia de les Plantes en Condicions Mediterranies, Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa Km 7.5, 07122 Palma de Mallorca, Spain
| | - Alisdair R Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Hipolito Medrano
- Grup de Recerca en Biologia de les Plantes en Condicions Mediterranies, Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa Km 7.5, 07122 Palma de Mallorca, Spain
| | - Alicia Pou
- Grup de Recerca en Biologia de les Plantes en Condicions Mediterranies, Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa Km 7.5, 07122 Palma de Mallorca, Spain
| | - Igor Florez-Sarasa
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany.
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Subirats J, Timoner X, Sànchez-Melsió A, Balcázar JL, Acuña V, Sabater S, Borrego CM. Emerging contaminants and nutrients synergistically affect the spread of class 1 integron-integrase (intI1) and sul1 genes within stable streambed bacterial communities. Water Res 2018; 138:77-85. [PMID: 29573631 DOI: 10.1016/j.watres.2018.03.025] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 03/01/2018] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
Wastewater effluents increase the nutrient load of receiving streams while introducing a myriad of anthropogenic chemical pollutants that challenge the resident aquatic (micro)biota. Disentangling the effects of both kind of stressors and their potential interaction on the dissemination of antibiotic resistance genes in bacterial communities requires highly controlled manipulative experiments. In this work, we investigated the effects of a combined regime of nutrients (at low, medium and high concentrations) and a mixture of emerging contaminants (ciprofloxacin, erythromycin, sulfamethoxazole, diclofenac, and methylparaben) on the bacterial composition, abundance and antibiotic resistance profile of biofilms grown in artificial streams. In particular, we investigated the effect of this combined stress on genes encoding resistance to ciprofloxacin (qnrS), erythromycin (ermB), sulfamethoxazole (sul1 and sul2) as well as the class 1 integron-integrase gene (intI1). Only genes conferring resistance to sulfonamides (sul1 and sul2) and intI1 gene were detected in all treatments during the study period. Besides, bacterial communities exposed to emerging contaminants showed higher copy numbers of sul1 and intI1 genes than those not exposed, whereas nutrient amendments did not affect their abundance. However, bacterial communities exposed to both emerging contaminants and a high nutrient concentration (1, 25 and 1 mg L-1 of phosphate, nitrate and ammonium, respectively) showed the highest increase on the abundance of sul1 and intI1 genes thus suggesting a factors synergistic effect of both stressors. Since none of the treatments caused a significant change on the composition of bacterial communities, the enrichment of sul1 and intI1 genes within the community was caused by their dissemination under the combined pressure exerted by nutrients and emerging contaminants. To the best of our knowledge, this is the first study demonstrating the contribution of nutrients on the maintenance and spread of antibiotic resistance genes in streambed biofilms under controlled conditions. Our results also highlight that nutrients could enhance the effect of emerging contaminants on the dissemination of antibiotic resistance.
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Affiliation(s)
- Jèssica Subirats
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain.
| | - Xisca Timoner
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain
| | - Alexandre Sànchez-Melsió
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain
| | - José Luis Balcázar
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain
| | - Vicenç Acuña
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain
| | - Sergi Sabater
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain; GRECO, Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Carles M Borrego
- Catalan Institute for Water Research (ICRA), Scientific and Technological Park of the University of Girona, Girona, Spain; Group of Molecular Microbial Ecology, Institute of Aquatic Ecology, University of Girona, Girona, Spain
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Lambert AS, Dabrin A, Foulquier A, Morin S, Rosy C, Coquery M, Pesce S. Influence of temperature in pollution-induced community tolerance approaches used to assess effects of copper on freshwater phototrophic periphyton. Sci Total Environ 2017; 607-608:1018-1025. [PMID: 28724220 DOI: 10.1016/j.scitotenv.2017.07.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 07/03/2017] [Accepted: 07/04/2017] [Indexed: 06/07/2023]
Abstract
By measuring levels of tolerance to toxicants in microbial communities using functional toxicity tests under controlled conditions, pollution-induced community tolerance (PICT) approaches offer an effect-based tool to assess the ecological risk of chemicals in aquatic systems. However, induced tolerance of exposed microbial communities cannot always be attributed solely to the presence of toxicants as various environmental factors, such as temperature, can also be involved. Several PICT studies have been conducted to assess the effects of copper (Cu) on phototrophic periphyton, but little is known about the influence of temperature on the response of these microbial communities to acute and chronic exposure to Cu. Here, we report on a microcosm approach to assess the effects of two contrasting temperatures (18°C and 28°C) on (i) the baseline level of Cu tolerance in non-Cu-exposed phototrophic periphyton (i.e. effect of temperature on tolerance baseline), (ii) Cu tolerance acquisition by phototrophic periphyton in response to a 3-week chronic exposure to Cu at a nominal concentration of 60μgL-1 (i.e. effect of temperature on PICT selection) and (iii) tolerance measured during short-term toxicity tests (i.e. effect of temperature on PICT detection). The aim was to evaluate how temperature conditions during the different phases of the PICT approaches may modify the causal relationship between chronic Cu exposure and measured Cu tolerance levels. Our results evidence the influence of temperature both on the basal capacity of phototrophic periphyton to tolerate subsequent exposure to Cu (i.e. influence on tolerance baseline) and on its capacity to acquire tolerance following chronic exposure to Cu (i.e. influence on PICT selection). Hence temperature must be considered when using PICT to establish causal links between chronic Cu exposure and effects on phototrophic periphyton.
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Affiliation(s)
- Anne Sophie Lambert
- Irstea, UR MALY, centre de Lyon-Villeurbanne, 5 rue de la Doua, BP 32108, 69616 Villeurbanne Cedex, France.
| | - Aymeric Dabrin
- Irstea, UR MALY, centre de Lyon-Villeurbanne, 5 rue de la Doua, BP 32108, 69616 Villeurbanne Cedex, France.
| | - Arnaud Foulquier
- Laboratoire d'Écologie Alpine - UMR CNRS 5553, Université Grenoble Alpes, BP 53, 38041 Grenoble Cedex 9, France.
| | - Soizic Morin
- Irstea, UR EABX, 50 avenue de Verdun, 33612 Cestas, France.
| | - Christophe Rosy
- Irstea, UR MALY, centre de Lyon-Villeurbanne, 5 rue de la Doua, BP 32108, 69616 Villeurbanne Cedex, France.
| | - Marina Coquery
- Irstea, UR MALY, centre de Lyon-Villeurbanne, 5 rue de la Doua, BP 32108, 69616 Villeurbanne Cedex, France.
| | - Stéphane Pesce
- Irstea, UR MALY, centre de Lyon-Villeurbanne, 5 rue de la Doua, BP 32108, 69616 Villeurbanne Cedex, France.
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Woods RE, Sgrò CM, Hercus MJ, Hoffmann AA. THE ASSOCIATION BETWEEN FLUCTUATING ASYMMETRY, TRAIT VARIABILITY, TRAIT HERITABILITY, AND STRESS: A MULTIPLY REPLICATED EXPERIMENT ON COMBINED STRESSES IN DROSOPHILA MELANOGASTER. Evolution 2017; 53:493-505. [PMID: 28565415 DOI: 10.1111/j.1558-5646.1999.tb03784.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/1998] [Accepted: 11/12/1998] [Indexed: 11/28/2022]
Abstract
A number of hypotheses have been proposed about the association between developmental stability phenotypic variability, heritability, and environmental stress. Stress is often considered to increase both the asymmetry and phenotypic variability of bilateral traits, although this may depend on trait heritability. Empirical studies of such associations often yield inconsistent results. This may reflect the diversity of traits and conditions used or a low repeatability of any associations. To test for repeatable associations between these variables, multiply replicated experiments were undertaken on Drosophila melanogaster using a combination stress at the egg, larval and adult stages of reduced protein, ethanol in the medium, and a cold shock. Both metric and meristic traits were measured and levels of heritable variation for each trait estimated by maximum likelihood and parent-offspring regression over three generations. Trait means were reduced by stress, whereas among-individual variation increased Fluctuating asymmetry (FA) was increased by stress in some cases, but few comparisons were significant. Only one trait orbital bristle, showed consistent increases in FA. Changes in trait means, trait phenotypic variability, and developmental stability as a result of stress were not correlated. Extreme phenotypes tended to have higher levels of FA but only the results for orbital bristles were significant. All traits had low to intermediate heritabilities except orbital bristle, which showed no heritable variation. Only traits with low heritability and high levels of phenotypic variability may show consistent increases in FA under stress. Overall, the independence of phenotypic variability, plasticity, and the developmental stability of traits extend to changes in these measures under stressful conditions.
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Affiliation(s)
- Richard E Woods
- Evolutionary Biology Unit, Department of Biochemistry and Genetics, La Trobe University, Bundoora, Victoria, 3083, Australia
| | - Carla M Sgrò
- Evolutionary Biology Unit, Department of Biochemistry and Genetics, La Trobe University, Bundoora, Victoria, 3083, Australia
| | - Miriam J Hercus
- Evolutionary Biology Unit, Department of Biochemistry and Genetics, La Trobe University, Bundoora, Victoria, 3083, Australia
| | - Ary A Hoffmann
- Evolutionary Biology Unit, Department of Biochemistry and Genetics, La Trobe University, Bundoora, Victoria, 3083, Australia
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Westman JO, Wang R, Novy V, Franzén CJ. Sustaining fermentation in high-gravity ethanol production by feeding yeast to a temperature-profiled multifeed simultaneous saccharification and co-fermentation of wheat straw. Biotechnol Biofuels 2017; 10:213. [PMID: 28919926 PMCID: PMC5596858 DOI: 10.1186/s13068-017-0893-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 08/24/2017] [Indexed: 05/17/2023]
Abstract
BACKGROUND Considerable progress is being made in ethanol production from lignocellulosic feedstocks by fermentation, but negative effects of inhibitors on fermenting microorganisms are still challenging. Feeding preadapted cells has shown positive effects by sustaining fermentation in high-gravity simultaneous saccharification and co-fermentation (SSCF). Loss of cell viability has been reported in several SSCF studies on different substrates and seems to be the main reason for the declining ethanol production toward the end of the process. Here, we investigate how the combination of yeast preadaptation and feeding, cell flocculation, and temperature reduction improves the cell viability in SSCF of steam pretreated wheat straw. RESULTS More than 50% cell viability was lost during the first 24 h of high-gravity SSCF. No beneficial effects of adding selected nutrients were observed in shake flask SSCF. Ethanol concentrations greater than 50 g L-1 led to significant loss of viability and prevented further fermentation in SSCF. The benefits of feeding preadapted yeast cells were marginal at later stages of SSCF. Yeast flocculation did not improve the viability but simplified cell harvest and improved the feasibility of the cell feeding strategy in demo scale. Cultivation at 30 °C instead of 35 °C increased cell survival significantly on solid media containing ethanol and inhibitors. Similarly, in multifeed SSCF, cells maintained the viability and fermentation capacity when the temperature was reduced from 35 to 30 °C during the process, but hydrolysis yields were compromised. By combining the yeast feeding and temperature change, an ethanol concentration of 65 g L-1, equivalent to 70% of the theoretical yield, was obtained in multifeed SSCF on pretreated wheat straw. In demo scale, the process with flocculating yeast and temperature profile resulted in 5% (w/w) ethanol, equivalent to 53% of the theoretical yield. CONCLUSIONS Multifeed SSCF was further developed by means of a flocculating yeast and a temperature-reduction profile. Ethanol toxicity is intensified in the presence of lignocellulosic inhibitors at temperatures that are beneficial to hydrolysis in high-gravity SSCF. The counteracting effects of temperature on cell viability and hydrolysis call for more tolerant microorganisms, enzyme systems with lower temperature optimum, or full optimization of the multifeed strategy with temperature profile.
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Affiliation(s)
- Johan O. Westman
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
- Present Address: Chr. Hansen A/S, Bøge Allé 10-12, 2970 Hørsholm, Denmark
| | - Ruifei Wang
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Vera Novy
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Graz, Austria
- Present Address: Forest Products Biotechnology, Faculty of Forestry, University of British Columbia, Vancouver, BC V6T1Z4 Canada
| | - Carl Johan Franzén
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
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Regier N, Beauvais-Flück R, Slaveykova VI, Cosio C. Elodea nuttallii exposure to mercury exposure under enhanced ultraviolet radiation: Effects on bioaccumulation, transcriptome, pigment content and oxidative stress. Aquat Toxicol 2016; 180:218-226. [PMID: 27744139 DOI: 10.1016/j.aquatox.2016.10.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 09/16/2016] [Accepted: 10/01/2016] [Indexed: 06/06/2023]
Abstract
The hypothesis that increased UV radiation result in co-tolerance to Hg toxicity in aquatic plants was studied at the physiological and transcriptomic level in Elodea nuttallii. At the transcriptomic level, combined exposure to UV+Hg enhanced the stress response in comparison with single treatments, affecting the expression level of transcripts involved in energy metabolism, lipid metabolism, nutrition, and redox homeostasis. Single and combined UV and Hg treatments dysregulated different genes but with similar functions, suggesting a fine regulation of the plant to stresses triggered by Hg, UV and their combination but lack of co-tolerance. At the physiological level, UV+Hg treatment reduced chlorophyll content and depleted antioxidative compounds such as anthocyanin and GSH/GSSG in E. nuttallii. Nonetheless, combined exposure to UV+Hg resulted in about 30% reduction of Hg accumulation into shoots vs exposure to Hg alone, which was congruent with the level of expression of several transporter genes, as well as the UV effect on Hg bioavailability in water. The findings of the present work underlined the importance of performing experimentation under environmentally realistic conditions and to consider the interplay between contaminants and environmental variables such as light that might have confounding effects to better understand and anticipate the effects of multiple stressors in aquatic environment.
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Affiliation(s)
- Nicole Regier
- Environmental Biogeochemistry and Ecotoxicology, Institute F.-A. Forel, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 66 boulevard Carl-Vogt, CH-1211 Geneva, Switzerland
| | - Rebecca Beauvais-Flück
- Environmental Biogeochemistry and Ecotoxicology, Institute F.-A. Forel, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 66 boulevard Carl-Vogt, CH-1211 Geneva, Switzerland
| | - Vera I Slaveykova
- Environmental Biogeochemistry and Ecotoxicology, Institute F.-A. Forel, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 66 boulevard Carl-Vogt, CH-1211 Geneva, Switzerland
| | - Claudia Cosio
- Environmental Biogeochemistry and Ecotoxicology, Institute F.-A. Forel, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 66 boulevard Carl-Vogt, CH-1211 Geneva, Switzerland.
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Lee SY, Boon NJ, Webb AAR, Tanaka RJ. Synergistic Activation of RD29A Via Integration of Salinity Stress and Abscisic Acid in Arabidopsis thaliana. Plant Cell Physiol 2016; 57:2147-2160. [PMID: 27497445 PMCID: PMC5434669 DOI: 10.1093/pcp/pcw132] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 07/19/2016] [Indexed: 05/23/2023]
Abstract
Plants perceive information from the surroundings and elicit appropriate molecular responses. How plants dynamically respond to combinations of external inputs is yet to be revealed, despite the detailed current knowledge of intracellular signaling pathways. We measured dynamics of Response-to-Dehydration 29A (RD29A) expression induced by single or combined NaCl and ABA treatments in Arabidopsis thaliana. RD29A expression in response to a combination of NaCl and ABA leads to unique dynamic behavior that cannot be explained by the sum of responses to individual NaCl and ABA. To explore the potential mechanisms responsible for the observed synergistic response, we developed a mathematical model of the DREB2 and AREB pathways based on existing knowledge, where NaCl and ABA act as the cognate inputs, respectively, and examined various system structures with cross-input modulation, where non-cognate input affects expression of the genes involved in adjacent signaling pathways. The results from the analysis of system structures, combined with the insights from microarray expression profiles and model-guided experiments, predicted that synergistic activation of RD29A originates from enhancement of DREB2 activity by ABA. Our analysis of RD29A expression profiles demonstrates that a simple mathematical model can be used to extract information from temporal dynamics induced by combinatorial stimuli and produce experimentally testable hypotheses.
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Affiliation(s)
- Sang Y Lee
- Department of Bioengineering, Imperial College London, London SW7 2AZ, UK
| | - Neville J Boon
- Department of Bioengineering, Imperial College London, London SW7 2AZ, UK
| | - Alex A R Webb
- Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, UK
| | - Reiko J Tanaka
- Department of Bioengineering, Imperial College London, London SW7 2AZ, UK
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Shilja S, Sejian V, Bagath M, Mech A, David CG, Kurien EK, Varma G, Bhatta R. Adaptive capability as indicated by behavioral and physiological responses, plasma HSP70 level, and PBMC HSP70 mRNA expression in Osmanabadi goats subjected to combined (heat and nutritional) stressors. Int J Biometeorol 2016; 60:1311-1323. [PMID: 26698161 DOI: 10.1007/s00484-015-1124-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 11/26/2015] [Accepted: 12/11/2015] [Indexed: 06/05/2023]
Abstract
A study was conducted to assess the impact of heat and nutritional stress simultaneously on the adaptive capability as indicated by behavioral and physiological responses, plasma heat shock protein 70 (HSP70) level, and peripheral blood mononuclear cells (PBMC) HSP70 gene expression in goats. Twenty-four adult Osmanabadi bucks (average body weight (BW) 16.0 kg) were used in the present study. The bucks were divided into four groups viz., C (n = 6; control), HS (n = 6; heat stress), NS (n = 6; nutritional stress), and CS (n = 6; combined stress). The study was conducted for a period of 45 days. C and HS bucks had ad libitum access to their feed while NS and CS bucks were under restricted feed (30 % intake of C bucks) to induce nutritional stress. The HS and CS bucks were exposed to solar radiation for 6 h a day between 10:00 a.m. and 4:00 p.m. to induce heat stress. The data was analyzed using repeated measures analysis of variance. The standing time differed significantly (P < 0.01) between ad libitum fed groups (C and HS) and restricted feeding groups (NS and CS). The highest (P < 0.01) lying time was recorded in the CS group while the lowest in the C and HS groups. The highest (P < 0.01) drinking frequency was also recorded in the CS group. Water intake recorded was significantly (P < 0.01) higher in both the HS and CS groups. The highest respiration rate (RR), pulse rate (PR), and rectal temperature (RT) during the afternoon were also recorded in the CS group. Further, skin temperature of the head, flank, and scrotum during the afternoon was also higher (P < 0.01) in the CS group. In addition, both plasma HSP70 concentration and PBMC HSP70 messenger RNA (mRNA) transcript expression were also significantly (P < 0.01) higher in the CS group. It can be concluded from this study that when two stressors occur simultaneously, they may have severe impact on adaptive capabilities of Osmanabadi bucks as compared to that would occur individually. Further, the study indicated that lying time, drinking frequency, RR, RT, plasma HSP70, and PBMC HSP70 gene expression may act as ideal biological markers for assessing the impact of CS on adaptive capabilities in bucks.
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Affiliation(s)
- Shaji Shilja
- ICAR-National Institute of Animal Nutrition and Physiology, Adugodi, Bangalore, India
- Academy of Climate Change Education and Research, Kerala Agricultural University, Vellanikkara, Thrissur, Kerala, India
| | - V Sejian
- ICAR-National Institute of Animal Nutrition and Physiology, Adugodi, Bangalore, India.
| | - M Bagath
- ICAR-National Institute of Animal Nutrition and Physiology, Adugodi, Bangalore, India
| | - A Mech
- ICAR-National Institute of Animal Nutrition and Physiology, Adugodi, Bangalore, India
| | - C G David
- ICAR-National Institute of Animal Nutrition and Physiology, Adugodi, Bangalore, India
| | - E K Kurien
- Academy of Climate Change Education and Research, Kerala Agricultural University, Vellanikkara, Thrissur, Kerala, India
| | - Girish Varma
- Centre for Animal Adaptation to Environment and Climate Change Studies, Kerala Veterinary and Animal Sciences University, Mannuthy, Thrissur, Kerala, India
| | - Raghavendra Bhatta
- ICAR-National Institute of Animal Nutrition and Physiology, Adugodi, Bangalore, India
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El Aou-Ouad H, Montero R, Medrano H, Bota J. Interactive effects of grapevine leafroll-associated virus 3 (GLRaV-3) and water stress on the physiology of Vitis vinifera L. cv. Malvasia de Banyalbufar and Giro-Ros. J Plant Physiol 2016; 196-197:106-115. [PMID: 27153513 DOI: 10.1016/j.jplph.2016.04.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 04/09/2016] [Accepted: 04/11/2016] [Indexed: 06/05/2023]
Abstract
Among several biotic and abiotic stress combinations, interaction between drought and pathogen is one of the most studied combinations in some crops but still not in grapevine. In the present work, we focused on the interaction effects of biotic (GLRaV-3) and abiotic (drought) stresses on grapevine photosynthetic metabolism on two cultivars (cvs. 'Malvasia de Banyalbufar and Giro-Ros'). Non-infected and GLRaV-3 infected potted plants were compared under water stress conditions (WS) and well-watered (WW) conditions. Under WW condition, the results showed that photosynthesis (AN) in both cultivars was decreased by the presence of GLRaV-3. The stomatal conductance (gs) was the main factor for decreasing AN in Malvasia, meanwhile reductions in Giro-Ros were closely related to decreases in gm. The observed differences in gm between both cultivars might result from variation in their leaf anatomical, Giro-Ros having higher values of gm and leaf porosity (in all treatments). Moderate water deficit resulted in a closure of stomata and a decrease in gm accompanied by a decrease in AN in both cultivars. The maximum velocity of carboxylation (Vcmax) and electron transport rate (Jmax) were also reduced under water stress. Moreover, the combined stress resulted in a reduction of most physiological parameters compared to healthy irrigated plants. However, no considerable differences were found between non-infected and virus infected (GLRaV-3) plants under water stress. Most of the results could be explained by the difference of virus concentration between cultivars and treatments.
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Affiliation(s)
- Hanan El Aou-Ouad
- Grup de Recerca en Biologia de les Plantes en Condicions Mediterrànies, Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa, km 7.5, 07122, Palma de Mallorca, Balears, Spain
| | - Rafael Montero
- Institut de Recerca i Formació Agrària i Pesquera (IRFAP), Conselleria d'Agricultura, Medi Ambient i Territori, Govern de les Illes Balears, C/Eusebio Estada n° 145, 07009, Palma de Mallorca, Spain
| | - Hipólito Medrano
- Grup de Recerca en Biologia de les Plantes en Condicions Mediterrànies, Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa, km 7.5, 07122, Palma de Mallorca, Balears, Spain
| | - Josefina Bota
- Grup de Recerca en Biologia de les Plantes en Condicions Mediterrànies, Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa, km 7.5, 07122, Palma de Mallorca, Balears, Spain.
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Wang YJ, Dong YX, Wang J, Cui XM. Alleviating effects of exogenous NO on tomato seedlings under combined Cu and Cd stress. Environ Sci Pollut Res Int 2016; 23:4826-36. [PMID: 26545885 DOI: 10.1007/s11356-015-5525-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 10/01/2015] [Indexed: 05/10/2023]
Abstract
To investigate the effect of NO on the different origin and regulation of oxidative stress of Cu and/or Cd, tomato seedlings were treated with Cu, Cd, or Cu + Cd in a nutrient solution culture system. The main effect of Cu(2+) was a significant reduction in root activity and nitrate reductase (NR) activity, which was similar to that under 50 μM Cd treatment, but promoted Cu accumulation. The supply of Cu under Cd treatment decreased Cd concentration, while not altered Cu concentration by contrast with Cu treatment, which is suggestive of a replacement of Cu(2+) with Cd(2+) and effective decrease in the boiotoxicity of 50 μM Cd(2+) to tomato seedlings. However, NO alleviated the restriction to NR activity significantly and made the biomass of tomato seedlings recover under Cd treatment, and also increased root activity under Cu and Cu + Cd treatment. Exogenous NO markedly reduced the absorption and transportation of Cu but did not obviously change the translocation of Cd to the aboveground parts under Cu + Cd treatment. Both metals induced lipid peroxidation via the decreasing activation of antioxidant enzymes. The antioxidant enzyme system worked differently under Cu, Cd, or Cu + Cd stress. The activities of peroxidase (POD) and catalase (CAT) were higher under single Cd stress than under the control. Meanwhile, Cu + Cd treatment decreased the activities of POD, superoxide dismutase (SOD), and ascorbic acid peroxidase (APX). Exogenous NO increased POD and SOD activities in the leaves and roots, and CAT activity in the roots under combined Cu and Cd stress. These results suggest that a different response and regulation mechanism that involves exogenous NO is present in tomato seedlings under Cu and Cd stress.
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Affiliation(s)
- Yi-Jun Wang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Tai'an, China
| | - Yu-Xiu Dong
- College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Juan Wang
- Department of Landscape Engineering, Heze University, Heze, China
| | - Xiu-Min Cui
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Tai'an, China.
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Cheloni G, Marti E, Slaveykova VI. Interactive effects of copper oxide nanoparticles and light to green alga Chlamydomonas reinhardtii. Aquat Toxicol 2016; 170:120-128. [PMID: 26655656 DOI: 10.1016/j.aquatox.2015.11.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 10/15/2015] [Accepted: 11/19/2015] [Indexed: 05/13/2023]
Abstract
The present study explores the effect of light with different spectral composition on the stability of CuO-nanoparticle (CuO-NP) dispersions and their effects to green alga Chlamydomonas reinhardtii. The results showed that simulated natural light (SNL) and light with enhanced UVB radiation (UVR*) do not affect the dissolution of CuO-NPs as compared to light irradiation conditions typically used in laboratory incubator (INC). Comparable values of ζ-potential and hydrodynamic size during 24h were found under all studied conditions. Concentrations of CuO-NPs below 1mgL(-1) do not attenuate the light penetration in the algal suspensions in comparison with NP-free system. Exposure to a combination of 8μgL(-1) or 0.8mgL(-1) CuO-NPs and INC or SNL has no significant effect on the algal growth inhibition, algal fluorescence and membrane integrity under short-term exposure. However, an enhancement of the percentage of cells experiencing oxidative stress was observed upon exposure to 0.8mgL(-1) CuO-NPs and SNL for 4 and 8h. Combination of UVR* and 0.8mgL(-1) CuO-NPs resulted in synergistic effects for all biological endpoints. Despite the photocatalytic properties of CuO-NPs no significant increase in abiotic reactive oxygen species (ROS) production under simulated solar radiation was observed suggesting that the synergistic effect observed might be correlated to other factors than CuO-NP-mediated ROS photoproduction. Tests performed with CuSO4 confirmed the important role of dissolution as toxicity driving force for lower CuO-NP concentration. However, they failed to clarify the contribution of dissolved Cu on the combined effects at 0.8mgL(-1) CuO-NPs. The results point out the necessity of taking into account the possible interactions between ENPs and changing light conditions when evaluating the potential effects of ENPs to phytoplankton in natural waters.
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Affiliation(s)
- Giulia Cheloni
- Environmental Biogeochemistry and Ecotoxicology, Institute F.-A. Forel, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 10 route de Suisse, CH-1290 Versoix, Switzerland
| | - Elodie Marti
- Environmental Biogeochemistry and Ecotoxicology, Institute F.-A. Forel, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 10 route de Suisse, CH-1290 Versoix, Switzerland
| | - Vera I Slaveykova
- Environmental Biogeochemistry and Ecotoxicology, Institute F.-A. Forel, Earth and Environmental Sciences, Faculty of Sciences, University of Geneva, 10 route de Suisse, CH-1290 Versoix, Switzerland.
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Ibrahim W, Ahmed IM, Chen X, Cao F, Zhu S, Wu F. Genotypic differences in photosynthetic performance, antioxidant capacity, ultrastructure and nutrients in response to combined stress of salinity and Cd in cotton. Biometals 2015; 28:1063-78. [PMID: 26525977 DOI: 10.1007/s10534-015-9890-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 10/23/2015] [Indexed: 10/22/2022]
Abstract
Combined stress of salinity and heavy metal is a serious problem for crop production; however, physiological mechanisms of tolerance to such condition remain elusive in cotton. Here, we used two cotton genotypes differing in salt tolerance, to understand their response to salinity (NaCl) and cadmium (Cd) either alone or in combination (Cd + Na) via hydroponics. Results showed that salinity and/or Cd drastically reduced plant growth, chlorophyll content and photosynthesis, with greater effect observed in Zhongmian 41 (sensitive) than Zhong 9806 (tolerant). Although salinity and/or Cd induced malondialdehyde (MDA) accumulation in Zhongmian 41 at 5 and 10 days after treatment, MDA content remained unchanged in Zhong 9806, implying that Zhongmian 41 but not Zhong 9806 faced oxidative stress following exposure to salinity and/or Cd. Differential responses of antioxidant enzymes such as superoxide dismutase, guaiacol peroxidase, catalase and ascorbate peroxidase to Cd, NaCl and Cd + Na indicate genotype- and time course- dependent variations. In both genotypes, Cd content was decreased while Na concentration was increased under combined stress compared with Cd alone. Importantly, NaCl addition in Cd-containing medium caused remarkable reduction in Cd concentration, with the extent of reduction being also dependent on genotypes. The salt-tolerant genotypes had lower Na concentration than sensitive ones. Furthermore, obvious changes in leaf and root ultrastructure was observed under Cd, Na and Cd + Na stress, however Zhong 9806 was less affected compared with Zhongmian 41. These results may provide novel insight into the physiological mechanisms of Cd + Na stress tolerance in various cotton genotypes.
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