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Danish S, Hussain GS, Hussain MB, Elgorban AM, Datta R. Unveiling the potential of A. fabrum and γ-aminobutyric acid for mitigation of nickel toxicity in fenugreek. Sci Rep 2024; 14:11042. [PMID: 38745058 PMCID: PMC11094130 DOI: 10.1038/s41598-024-61894-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 05/10/2024] [Indexed: 05/16/2024] Open
Abstract
Nickel (Ni) is a heavy metal that adversely affects the growth of different crops by inducing oxidative stress and nutrient imbalance. The role of rhizobacteria (RB) is vital to resolve this issue. They can promote root growth and facilitate the uptake of water and nutrients, resulting in better crop growth. On the other hand, γ-aminobutyric acid (GABA) can maintain the osmotic balance and scavenge the reactive oxygen species under stress conditions. However, the combined effect of GABA and RB has not been thoroughly explored to alleviate Ni toxicity, especially in fenugreek plants. Therefore, in the current pot study, four treatments, i.e., control, A. fabrum (RB), 0.40 mM GABA, and 0.40 mM GABA + RB, were applied under 0Ni and 80 mg Ni/kg soil (80Ni) stress. Results showed that RB + 0.40 mM GABA caused significant improvements in shoot length (~ 13%), shoot fresh weight (~ 47%), shoot dry weight (~ 47%), root length (~ 13%), root fresh weight (~ 60%), and root dry weight (~ 15%) over control under 80 Ni toxicity. A significant enhancement in total chlorophyll (~ 14%), photosynthetic rate (~ 17%), stomatal CO2 concentration (~ 19%), leaves and roots N (~ 10 and ~ 37%), P (~ 18 and ~ 7%) and K (~ 11 and ~ 30%) concentrations, while a decrease in Ni (~ 83 and ~ 49%) concentration also confirmed the effectiveness of RB + 0.40 mM GABA than control under 80Ni. In conclusion, fabrum + 0.40 mM GABA can potentially alleviate the Ni toxicity in fenugreek plants. The implications of these findings extend to agricultural practices, environmental remediation efforts, nutritional security, and ecological impact. Further research is recommended to elucidate the underlying mechanisms, assess long-term effects, and determine the practical feasibility of using A. fabrum + 0.40GABA to improve growth in different crops under Ni toxicity.
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Affiliation(s)
- Subhan Danish
- Department of Soil Science, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
| | - Ghulam Sabir Hussain
- Department of Agronomy, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, 66000, Pakistan
| | - Muhammad Baqir Hussain
- Department of Soil and Environmental Sciences, Muhammad Nawaz Sharif University of Agriculture Multan, Multan, Punjab, Pakistan.
| | - Abdallah M Elgorban
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, 11451, Riyadh, Saudi Arabia
| | - Rahul Datta
- Department of Geology and Pedology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemedelska 1, 61300, Brno, Czech Republic.
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Zarbakhsh S, Shahsavar AR, Afaghi A, Hasanuzzaman M. Predicting and optimizing reactive oxygen species metabolism in Punica granatum L. through machine learning: role of exogenous GABA on antioxidant enzyme activity under drought and salinity stress. BMC PLANT BIOLOGY 2024; 24:65. [PMID: 38263036 DOI: 10.1186/s12870-024-04740-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 01/10/2024] [Indexed: 01/25/2024]
Abstract
BACKGROUND Drought and salinity stress have been proposed as the main environmental factors threatening food security, as they adversely affect crops' agricultural productivity. As a potential solution, the application of plant growth regulators to enhance drought and salinity tolerance has gained considerable attention. γ-aminobutyric acid (GABA) is a four-carbon non-protein amino acid that accumulates in plants as a response to stressful conditions. This study focused on a comparative assessment of several machine learning (ML) regression models, including radial basis function, generalized regression neural network (GRNN), random forest (RF), and support vector regression (SVR) to develop predictive models for assessing the effect of different concentrations of GABA (0, 10, 20, and 40 mM) on various physio-biochemical traits during periods of drought, salinity, and combined stress conditions. The physio-biochemical traits included antioxidant enzyme activities (superoxide dismutase, SOD; peroxidase, POD; catalase, CAT; and ascorbate peroxidase, APX), protein content, malondialdehyde (MDA) levels, and hydrogen peroxide (H2O2) levels. The non‑dominated sorting genetic algorithm‑II (NSGA‑II) was employed for optimizing the superior prediction model. RESULTS The GRNN model outperformed the other ML algorithms and was therefore selected for optimization by NSGA-II. The GRNN-NSGA-II model revealed that treatment with GABA at concentrations of 20.90 mM and 20.54 mM, under combined drought and salinity stress conditions at 20.86 and 20.72 days post-treatment, respectively, could result in the maximum values for protein content (by 0.80 and 0.69), APX activity (by 50.63 and 51.51), SOD activity (by 0.54 and 0.53), POD activity (by 1.53 and 1.72), CAT activity (by 4.42 and 5.66), as well as lower MDA levels (by 0.12 and 0.15) and H2O2 levels (by 0.44 and 0.55), respectively, in the 'Atabaki' and 'Rabab' cultivars. CONCLUSIONS This study demonstrates that the GRNN-NSGA-II model, as an advanced ML algorithm with a strong predictive ability for outcomes in combined stressful environmental conditions, provides valuable insights into the significant factors influencing such multifactorial processes.
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Affiliation(s)
- Saeedeh Zarbakhsh
- Department of Horticultural Science, Faculty of Agriculture, Shiraz University, Shiraz, Iran.
| | - Ali Reza Shahsavar
- Department of Horticultural Science, Faculty of Agriculture, Shiraz University, Shiraz, Iran
| | - Ali Afaghi
- Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran
| | - Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Bangla Agricultural University, Sher-ESher-E-Bangla Nagar, Dhaka, 1207, Bangladesh
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Zarbakhsh S, Shahsavar AR. Exogenous γ-aminobutyric acid improves the photosynthesis efficiency, soluble sugar contents, and mineral nutrients in pomegranate plants exposed to drought, salinity, and drought-salinity stresses. BMC PLANT BIOLOGY 2023; 23:543. [PMID: 37926819 PMCID: PMC10626824 DOI: 10.1186/s12870-023-04568-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 10/27/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND γ-aminobutyric acid (GABA), as a regulator of many aspects of plant growth, has a pivotal role in improving plant stress resistance. However, few studies have focused on the use of GABA in increasing plants' resistance to interactional stresses, such as drought-salinity. Therefore, the focus of this study was to examine the effect of foliar application of GABA (0, 10, 20, and 40 mM) on growth indices and physio-biochemical parameters in plants of two pomegranate cultivars, 'Rabab' and 'Atabaki' exposed to drought, salinity, and drought-salinity. RESULTS Under stress conditions, the photosynthetic capacity of two pomegranate cultivars, including transpiration rate, net photosynthetic rate, intercellular carbon dioxide concentration, stomatal conductance of water vapour, and mesophyll conductance, was significantly reduced. This resulted in a decrease in root morphological traits such as fresh and dry weight, diameter, and volume, as well as the fresh and dry weight of the aerial part of the plants. However, the application of GABA reversed the negative effects caused by stress treatments on growth parameters and maintained the photosynthetic capacity. GABA application has induced the accumulation of compatible osmolytes, including total soluble carbohydrate, starch, glucose, fructose, and sucrose, in charge of providing energy for cellular defense response against abiotic stresses. Analysis of mineral nutrients has shown that GABA application increases the absorption of potassium, potassium/sodium, magnesium, phosphorus, manganese, zinc, and iron. As concentration increased up to 40 mM, GABA prevented the uptake of toxic ions, sodium and chloride. CONCLUSIONS These findings highlight the potential of GABA as a biostimulant strategy to enhance plant stress tolerance.
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Affiliation(s)
- Saeedeh Zarbakhsh
- Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, Iran
| | - Ali Reza Shahsavar
- Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, Iran.
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Yang X, Huo X, Tang Y, Zhao M, Tao Y, Huang J, Ke C. Integrating Enzyme Evolution and Metabolic Engineering to Improve the Productivity of Γ-Aminobutyric Acid by Whole-Cell Biosynthesis in Escherichia Coli. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:4656-4664. [PMID: 36881553 DOI: 10.1021/acs.jafc.2c07613] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
γ-Aminobutyric acid (GABA) is used widely in various fields, such as agriculture, food, pharmaceuticals, and biobased chemicals. Based on glutamate decarboxylase (GadBM4) derived from our previous work, three mutants, GadM4-2, GadM4-8, and GadM4-31, were obtained by integrating enzyme evolution and high-throughput screening methods. The GABA productivity obtained through whole-cell bioconversion using recombinant Escherichia coli cells harboring mutant GadBM4-2 was enhanced by 20.27% compared to that of the original GadBM4. Further introduction of the central regulator GadE of the acid resistance system and the enzymes from the deoxyxylulose-5-phosphate-independent pyridoxal 5'-phosphate biosynthesis pathway resulted in a 24.92% improvement in GABA productivity, reaching 76.70 g/L/h without any cofactor addition with a greater than 99% conversion ratio. Finally, when one-step bioconversion was applied for the whole-cell catalysis in a 5 L bioreactor, the titer of GABA reached 307.5 ± 5.94 g/L with a productivity of 61.49 g/L/h by using crude l-glutamic acid (l-Glu) as the substrate. Thus, the biocatalyst constructed above combined with the whole-cell bioconversion method represents an effective approach for industrial GABA production.
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Affiliation(s)
- Xinwei Yang
- National and Local United Engineering Research Center of Industrial Microbiology and Fermentation Technology; College of Life Sciences, Fujian Normal University, Fuzhou 350117, Fujian, People's Republic of China
| | - Xiaojing Huo
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, No. 1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Yaqian Tang
- National and Local United Engineering Research Center of Industrial Microbiology and Fermentation Technology; College of Life Sciences, Fujian Normal University, Fuzhou 350117, Fujian, People's Republic of China
| | - Mingyue Zhao
- National and Local United Engineering Research Center of Industrial Microbiology and Fermentation Technology; College of Life Sciences, Fujian Normal University, Fuzhou 350117, Fujian, People's Republic of China
| | - Yong Tao
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, No. 1 West Beichen Road, Chaoyang District, Beijing 100101, China
| | - Jianzhong Huang
- National and Local United Engineering Research Center of Industrial Microbiology and Fermentation Technology; College of Life Sciences, Fujian Normal University, Fuzhou 350117, Fujian, People's Republic of China
| | - Chongrong Ke
- National and Local United Engineering Research Center of Industrial Microbiology and Fermentation Technology; College of Life Sciences, Fujian Normal University, Fuzhou 350117, Fujian, People's Republic of China
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Wang L, Li X, Gao F, Liu Y, Lang S, Wang C, Zhang D. Effect of ultrasound combined with exogenous GABA treatment on polyphenolic metabolites and antioxidant activity of mung bean during germination. ULTRASONICS SONOCHEMISTRY 2023; 94:106311. [PMID: 36738696 PMCID: PMC9926298 DOI: 10.1016/j.ultsonch.2023.106311] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/08/2023] [Accepted: 01/21/2023] [Indexed: 05/27/2023]
Abstract
Mung bean seeds were treated by a combination of ultrasound and γ-aminobutyric acid (GABA). Effect of these treatments on the free polyphenols content, antioxidant activity, and digestibility of mung bean sprouts was evaluated. Additionally, phenolic compounds were analyzed and identified using a metabolomics approach. The combined ultrasound and GABA treatments significantly enhanced the free polyphenols and flavonoids content (P < 0.05) of mung bean sprouts depending on sprouting duration. Besides, a positive correlation (P < 0.05) was found between the polyphenols content and in vitro antioxidant activity of mung bean sprouts. Moreover, a total number of 608 metabolites were detected, and 55 polyphenol compounds were identified, including flavonoids, isoflavones, phenols, and coumarins. Also, the KEGG metabolic pathway analysis revealed 10 metabolic pathways of phenols, including flavonoid, isoflavone, and phenylpropanoid biosynthesis. Powder of 48 h sprouted mung bean released polyphenols during simulated gastric digestion and possessed antioxidant activity.
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Affiliation(s)
- Lidong Wang
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China; Daqing Center of Inspection and Testing for Agricultural Products and Processed Products Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, Daqing 163319, China; Department of National Coarse Cereals Engineering Research Center, Heilongjiang Bayi Agricultural University, Daqing 163319, China.
| | - Xiaoqiang Li
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China
| | - Fei Gao
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China
| | - Ying Liu
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China
| | - Shuangjing Lang
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China
| | - Changyuan Wang
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China
| | - Dongjie Zhang
- Daqing Center of Inspection and Testing for Agricultural Products and Processed Products Ministry of Agriculture and Rural Affairs, Heilongjiang Bayi Agricultural University, Daqing 163319, China
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Liu P, Wu X, Gong B, Lü G, Li J, Gao H. Review of the Mechanisms by Which Transcription Factors and Exogenous Substances Regulate ROS Metabolism under Abiotic Stress. Antioxidants (Basel) 2022; 11:2106. [PMID: 36358478 PMCID: PMC9686556 DOI: 10.3390/antiox11112106] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/19/2022] [Accepted: 10/20/2022] [Indexed: 10/03/2023] Open
Abstract
Reactive oxygen species (ROS) are signaling molecules that regulate many biological processes in plants. However, excess ROS induced by biotic and abiotic stresses can destroy biological macromolecules and cause oxidative damage to plants. As the global environment continues to deteriorate, plants inevitably experience abiotic stress. Therefore, in-depth exploration of ROS metabolism and an improved understanding of its regulatory mechanisms are of great importance for regulating cultivated plant growth and developing cultivars that are resilient to abiotic stresses. This review presents current research on the generation and scavenging of ROS in plants and summarizes recent progress in elucidating transcription factor-mediated regulation of ROS metabolism. Most importantly, the effects of applying exogenous substances on ROS metabolism and the potential regulatory mechanisms at play under abiotic stress are summarized. Given the important role of ROS in plants and other organisms, our findings provide insights for optimizing cultivation patterns and for improving plant stress tolerance and growth regulation.
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Affiliation(s)
- Peng Liu
- Key Laboratory of North China Water-Saving Irrigation Engineering, Hebei Key Laboratory of Vegetable Germplasm Innovation and Utilization, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding 071000, China
- Institute of Vegetables Research, Shandong Academy of Agricultural Sciences, Jinan 250100, China
| | - Xiaolei Wu
- Key Laboratory of North China Water-Saving Irrigation Engineering, Hebei Key Laboratory of Vegetable Germplasm Innovation and Utilization, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding 071000, China
| | - Binbin Gong
- Key Laboratory of North China Water-Saving Irrigation Engineering, Hebei Key Laboratory of Vegetable Germplasm Innovation and Utilization, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding 071000, China
| | - Guiyun Lü
- Key Laboratory of North China Water-Saving Irrigation Engineering, Hebei Key Laboratory of Vegetable Germplasm Innovation and Utilization, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding 071000, China
| | - Jingrui Li
- Key Laboratory of North China Water-Saving Irrigation Engineering, Hebei Key Laboratory of Vegetable Germplasm Innovation and Utilization, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding 071000, China
| | - Hongbo Gao
- Key Laboratory of North China Water-Saving Irrigation Engineering, Hebei Key Laboratory of Vegetable Germplasm Innovation and Utilization, Collaborative Innovation Center of Vegetable Industry in Hebei, College of Horticulture, Hebei Agricultural University, Baoding 071000, China
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Ashraf U, Mahmood S, Anjum SA, Abbas RN, Rasul F, Iqbal J, Mo Z, Tang X. Exogenous Gamma-Aminobutyric Acid Application Induced Modulations in the Performance of Aromatic Rice Under Lead Toxicity. FRONTIERS IN PLANT SCIENCE 2022; 13:933694. [PMID: 35958207 PMCID: PMC9361023 DOI: 10.3389/fpls.2022.933694] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 06/22/2022] [Indexed: 06/15/2023]
Abstract
Gamma-aminobutyric acid (GABA) is a non-protein amino acid and has a multi-functional role in abiotic stress tolerance. A pot experiment was conducted to assess the role of exogenous gamma-aminobutyric acid (GABA) application to modulate the growth, yield, and related physio-biochemical mechanisms in two aromatic rice cultivars, that is, Guixiangzhan (GXZ) and Nongxiang 18 (NX-18), under Pb toxic and normal conditions. The experimental treatments were comprised of Ck: without Pb and GABA (control), GABA: 1 mM GABA is applied under normal conditions (without Pb), Pb + GABA: 1 mM GABA is applied under Pb toxicity (800 mg kg-1 of soil), and Pb= only Pb (800 mg kg-1 of soil) is applied (no GABA). The required concentrations of GABA were applied as a foliar spray. Results revealed that Pb stress induced oxidative damage in terms of enhanced malondialdehyde (MDA), electrolyte leakage (EL), and H2O2 contents, while exogenous GABA application improved leaf chlorophyll, proline, protein and GABA contents, photosynthesis and gas exchange, and antioxidant defense under Pb toxicity in both rice cultivars. Moreover, glutamine synthetase (GS) and nitrate reductase (NR) activities were variably affected due to GABA application under Pb stress. The yield and related traits, that is, productive tillers/pot, grains/panicle, filled grain %, 1,000-grain weight, and grain yield were 13.64 and 10.29, 0.37% and 2.26%, 3.89 and 19.06%, 7.35 and 12.84%, and 17.92 and 40.56 lower under Pb treatment than Pb + GABA for GXZ and NX-18, respectively. Furthermore, exogenous GABA application in rice reduced Pb contents in shoot, leaves, panicle, and grains compared with Pb-exposed plants without GABA. Overall, GXZ performed better than NX-18 under Pb toxic conditions.
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Affiliation(s)
- Umair Ashraf
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan
- Department of Crop Science and Technology, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Sammina Mahmood
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan
| | | | - Rana Nadeem Abbas
- Department of Agronomy, University of Agriculture, Faisalabad, Pakistan
| | - Fahd Rasul
- Department of Agronomy, University of Agriculture, Faisalabad, Pakistan
| | - Javed Iqbal
- Department of Agricultural Engineering, Khawaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Zhaowen Mo
- Department of Crop Science and Technology, College of Agriculture, South China Agricultural University, Guangzhou, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Xiangru Tang
- Department of Crop Science and Technology, College of Agriculture, South China Agricultural University, Guangzhou, China
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou, China
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The regulatory role of γ-aminobutyric acid in chickpea plants depends on drought tolerance and water scarcity level. Sci Rep 2022; 12:7034. [PMID: 35487936 PMCID: PMC9054827 DOI: 10.1038/s41598-022-10571-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 03/31/2022] [Indexed: 11/10/2022] Open
Abstract
γ-Aminobutyric acid (GABA) is a non-protein amino acid with multifunctional roles in dynamic plant responses. To determine the effects of exogenous GABA application (0, 25 and 50 µM) on drought response, two chickpea cultivars with contrasting tolerance to water deficit were examined. Plants were exposed to four irrigation levels (irrigation to 100, 60, 40 and 20% field capacity). Water deficit decreased growth, chlorophyll content, and photosynthetic efficiency. It increased electrolyte leakage and lipid peroxidation owing to both higher ROS accumulation and lower antioxidant enzyme activity. These negative effects of water deficit and the alleviating role of GABA application were more prominent in the sensitive, as compared to the tolerant cultivar. Water deficit also increased proline and GABA contents more in the tolerant cultivar, whereas their content was more enhanced by GABA application in the sensitive one. This may confer an additional level of regulation that results in better alleviation of drought damage in tolerant chickpea cultivars. In conclusion, the stimulatory effect of GABA on growth and physiological modulation depends on both the water stress severity and the cultivar sensitivity to it, implying a probable unknown GABA-related mechanism established by tolerant chickpea cultivars; a lost or not gained mechanism in susceptible ones.
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Synergistic Effects of Melatonin and Gamma-Aminobutyric Acid on Protection of Photosynthesis System in Response to Multiple Abiotic Stressors. Cells 2021; 10:cells10071631. [PMID: 34209882 PMCID: PMC8306587 DOI: 10.3390/cells10071631] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/22/2021] [Accepted: 06/24/2021] [Indexed: 12/27/2022] Open
Abstract
GABA (gamma-aminobutyric acid) and melatonin are endogenous compounds that enhance plant responses to abiotic stresses. The response of Vicia faba to different stressors (salinity (NaCl), poly ethylene glycol (PEG), and sulfur dioxide (SO2)) was studied after priming with sole application of GABA and melatonin or their co-application (GABA + melatonin). Both melatonin and GABA and their co-application increased leaf area, number of flowers, shoot dry and fresh weight, and total biomass. Plants treated with GABA, melatonin, and GABA + melatonin developed larger stomata with wider aperture compared to the stomata of control plants. The functionality of the photosynthetic system was improved in primed plants. To investigate the photosynthetic functionality in details, the leaf samples of primed plants were exposed to different stressors, including SO2, PEG, and NaCl. The maximum quantum yield of photosystem II (PS II) was higher in the leaf samples of primed plants, while the non-photochemical quenching (NPQ) of primed plants was decreased when leaf samples were exposed to the stressors. Correlation analysis showed the association of initial PIabs with post-stress FV/FM and NPQ. Stressors attenuated the association of initial PIabs with both FV/FM and NPQ, while priming plants with GABA, melatonin, or GABA + melatonin minimized the effect of stressors by attenuating these correlations. In conclusion, priming plants with both GABA and melatonin improved growth and photosynthetic performance of Vicia faba and mitigated the effects of abiotic stressors on the photosynthetic performance.
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Physiological and Biochemical Characterization of the GABA Shunt Pathway in Pea (Pisum sativum L.) Seedlings under Drought Stress. HORTICULTURAE 2021. [DOI: 10.3390/horticulturae7060125] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The physiological and biochemical role of the γ-aminobutyric acid (GABA) shunt pathway in green pea seedlings (Pisum sativum L.) was studied in response to soil water holding capacity levels: 80%, 60%, 40%, 20%, and 10% grown under continuous light at 25 °C for 7 days and 14 days, separately. Characterization of seeds germination pattern, seedlings growth (plant height, fresh and dry weight, and chlorophyll contents), GABA shunt metabolite (GABA, glutamate, and alanine) levels, total protein and carbohydrate levels, and oxidative damage (MDA level) were examined. Data showed a significant effect of drought stress on seed germination, plant growth, GABA shunt metabolites level, total protein and carbohydrate contents, and MDA level. A significant decline in seed germination percentage was recorded at a 20% drought level, which indicated that 20% of soil water holding capacity is the threshold value of water availability for normal germination after 14 days. Seedling fresh weight, dry weight, and plant height were significantly reduced with a positive correlation as water availability was decreased. There was a significant decrease with a positive correlation in Chl a and Chl b contents in response to 7 days and 14 days of drought. GABA shunt metabolites were significantly increased with a negative correlation as water availability decreased. Pea seedlings showed a significant increase in protein content as drought stress was increased. Total carbohydrate levels increased significantly when the amount of water availability decreased. MDA content increased slightly but significantly after 7 days and sharply after 14 days under all water stress levels. The maximum increase in MDA content was observed at 20% and 10% water levels. Overall, the significant increases in GABA, protein and carbohydrate contents were to cope with the physiological impact of drought stress on Pisum sativum L. seedlings by maintaining cellular osmotic adjustment, protecting plants from oxidative stress, balancing carbon and nitrogen (C:N) metabolism, and maintaining cell metabolic homeostasis and cell turgor. The results presented in this study indicated that severe (less than 40% water content of the holding capacity) and long-term drought stress should be avoided during the germination stage to ensure proper seedling growth and metabolism in Pisum sativum L.
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Abd El-Gawad HG, Mukherjee S, Farag R, Abd Elbar OH, Hikal M, Abou El-Yazied A, Abd Elhady SA, Helal N, ElKelish A, El Nahhas N, Azab E, Ismail IA, Mbarki S, Ibrahim MFM. Exogenous γ-aminobutyric acid (GABA)-induced signaling events and field performance associated with mitigation of drought stress in Phaseolus vulgaris L. PLANT SIGNALING & BEHAVIOR 2021; 16:1853384. [PMID: 33356834 PMCID: PMC7849733 DOI: 10.1080/15592324.2020.1853384] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Not much information is available to substantiate the possible role of γ -aminobutyric acid (GABA) signaling in mitigating water-deficit stress in snap bean (Phaseolus vulgaris L.) plants under semiarid conditions. Present work aims to investigate the role of exogenous GABA (foliar application; 0.5, 1 and 2 mM) in amelioration of drought stress and improvement of field performance on snap bean plants raised under two drip irrigation regimes (100% and 70% of water requirements). Water stress led to significant reduction in plant growth, leaf relative water content (RWC), cell membrane stability index (CMSI), nutrient uptake (N, P, K, Ca, Fe and Zn), pod yield and its content from protein and total soluble solids (TSS). Meanwhile, lipid peroxidation (malondialdehyde content- MDA), osmolyte content (free amino acids- FAA, proline, soluble sugars) antioxidative defense (activity of superoxide dismutase- SOD, catalase- CAT, peroxidase- POX and ascorbate peroxidase- APX) and the pod fiber content exhibited significantly increase due to water stress. Exogenous GABA application (especially at 2 mM) revealed partial normalization of the effects of drought stress in snap bean plants. GABA-induced mitigation of drought stress was manifested by improvement in growth, water status, membrane integrity, osmotic adjustment, antioxidant defense and nutrient acquisition. Furthermore, GABA application during water stress in snap bean plants resulted in improvement of field performance being manifested by increased pod yield and its quality attributes. To sum up, exogenous GABA appears to function as an effective priming molecule to alleviate drought stress in snap bean plants under semiarid conditions.
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Affiliation(s)
- Hany G. Abd El-Gawad
- Department of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Soumya Mukherjee
- , Department of Botany, Jangipur College, University of Kalyani, West Bengal, India
- CONTACT Soumya Mukherjee Department of Botany, Jangipur College (University of Kalyani), Chota Kalia, Jangipur, District Murshidabad West Bengal 742213, India
| | - Reham Farag
- Department of Agricultural Botany, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Ola H. Abd Elbar
- Department of Agricultural Botany, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Mohamed Hikal
- Department of Biochemistry, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Ahmed Abou El-Yazied
- Department of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Salama A. Abd Elhady
- Department of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Nesreen Helal
- Department of Horticulture, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Amr ElKelish
- Botany Department, Faculty of Science, Suez Canal University, Ismailia, Egypt
| | - Nihal El Nahhas
- Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Ehab Azab
- Department of Biotechnology, College of Science, Taif University, Saudi Arabia
- Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, Sharkia, Egypt
| | - Ismail A. Ismail
- Department of Biology, College of Science, Taif University, Saudi Arabia
- Agricultural Genetic Engineering Research Institute, Agricultural Research Center, Giza, Egypt
| | - Sonia Mbarki
- Laboratory of Valorisation of Unconventional Waters, National Institute of Research in Rural Engineering, Water and Forests(INRGREF), Ariana, Tunisia
| | - Mohamed F. M. Ibrahim
- Department of Agricultural Botany, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
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12
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Abid G, Ouertani RN, Jebara SH, Boubakri H, Muhovski Y, Ghouili E, Abdelkarim S, Chaieb O, Hidri Y, Kadri S, El Ayed M, Elkahoui S, Barhoumi F, Jebara M. Alleviation of drought stress in faba bean ( Vicia faba L.) by exogenous application of β-aminobutyric acid (BABA). PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2020; 26:1173-1186. [PMID: 32549681 PMCID: PMC7266865 DOI: 10.1007/s12298-020-00796-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/07/2020] [Accepted: 03/04/2020] [Indexed: 05/25/2023]
Abstract
Drought stress is one of the most prevalent environmental factors limiting faba bean (Vicia faba L.) crop productivity. β-aminobutyric acid (BABA) is a non-protein amino acid that may be involved in the regulation of plant adaptation to drought stress. The effect of exogenous BABA application on physiological, biochemical and molecular responses of faba bean plants grown under 18% PEG-induced drought stress were investigated. The results showed that the application of 1 mM of BABA improved the drought tolerance of faba bean. The application of BABA increased the leaf relative water content, leaf photosynthesis rate (A), transpiration rate (E), and stomatal conductance (gs), thereby decreased the water use efficiency. Furthermore, exogenous application of BABA decreased production of hydrogen peroxide (H2O2), malondialdehyde and electrolyte leakage levels, leading to less cell membrane damage due to oxidative stress. Regarding osmoprotectants, BABA application enhanced the accumulation of proline, and soluble sugars, which could improve the osmotic adjustment ability of faba bean under drought challenge. Interestingly, mended antioxidant enzyme activities like catalase, guaiacol peroxidase, ascorbate peroxidase and superoxide dismutase and their transcript levels may lead to counteract the damaging effects of oxidative stress and reducing the accumulation of harmful substances in BABA-treated faba bean plants. In addition, exogenous BABA significantly induced the accumulation of drought tolerance-related genes like VfMYB, VfDHN, VfLEA, VfERF, VfNCED, VfWRKY, VfHSP and VfNAC in leaves and roots, suggesting that BABA might act as a signal molecule to regulate the expression of drought tolerance-related genes.
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Affiliation(s)
- Ghassen Abid
- Laboratory of Legumes, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Rim Nefissi Ouertani
- Laboratory of Plant Molecular Physiology, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Salwa Harzalli Jebara
- Laboratory of Legumes, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Hatem Boubakri
- Laboratory of Legumes, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Yordan Muhovski
- Department of Life Sciences, Walloon Agricultural Research Centre, Chaussée de Charleroi, 234, 5030 Gembloux, Belgium
| | - Emna Ghouili
- Laboratory of Legumes, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Souhir Abdelkarim
- Laboratory of Legumes, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Oumaima Chaieb
- Laboratory of Legumes, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Yassine Hidri
- Laboratory of Biotechnology and Bio-Geo Resources Valorization, Olive Tree Institute, University of Sfax, 1087, 3000 Sfax, Tunisia
| | - Safwen Kadri
- Laboratory of Bioactive Substances, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Mohamed El Ayed
- Laboratory of Bioactive Substances, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Salem Elkahoui
- Laboratory of Bioactive Substances, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
- Department of Biology, College of Science, University of Ha’il, P. O. Box 2440, Hail, 81451 Kingdom of Saudi Arabia
| | - Fethi Barhoumi
- Laboratory of Legumes, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
| | - Moez Jebara
- Laboratory of Legumes, Biotechnology Center of Borj Cedria, University of Tunis El Manar, 901, 2050 Hammam-Lif, Tunisia
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13
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Ran W, Xiang Q, Pan Y, Xie T, Zhang Y, Yao C. Enhancing Photosynthetic Starch Production by γ-Aminobutyric Acid Addition in a Marine Green Microalga Tetraselmis subcordiformis under Nitrogen Stress. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00398] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wenyi Ran
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Qi Xiang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yunyun Pan
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Tonghui Xie
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yongkui Zhang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Changhong Yao
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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14
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Seifikalhor M, Aliniaeifard S, Bernard F, Seif M, Latifi M, Hassani B, Didaran F, Bosacchi M, Rezadoost H, Li T. γ-Aminobutyric acid confers cadmium tolerance in maize plants by concerted regulation of polyamine metabolism and antioxidant defense systems. Sci Rep 2020; 10:3356. [PMID: 32098998 PMCID: PMC7042251 DOI: 10.1038/s41598-020-59592-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 01/27/2020] [Indexed: 11/24/2022] Open
Abstract
Gamma-Aminobutyric acid (GABA) accumulates in plants following exposure to heavy metals. To investigate the role of GABA in cadmium (Cd) tolerance and elucidate the underlying mechanisms, GABA (0, 25 and 50 µM) was applied to Cd-treated maize plants. Vegetative growth parameters were improved in both Cd-treated and control plants due to GABA application. Cd uptake and translocation were considerably inhibited by GABA. Antioxidant enzyme activity was enhanced in plants subjected to Cd. Concurrently GABA caused further increases in catalase and superoxide dismutase activities, which led to a significant reduction in hydrogen peroxide, superoxide anion and malondealdehyde contents under stress conditions. Polyamine biosynthesis-responsive genes, namely ornithine decarboxylase and spermidine synthase, were induced by GABA in plants grown under Cd shock. GABA suppressed polyamine oxidase, a gene related to polyamine catabolism, when plants were exposed to Cd. Consequently, different forms of polyamines were elevated in Cd-exposed plants following GABA application. The maximum quantum efficiency of photosystem II (Fv/Fm) was decreased by Cd-exposed plants, but was completely restored by GABA to the same value in the control. These results suggest a multifaceted contribution of GABA, through regulation of Cd uptake, production of reactive oxygen species and polyamine metabolism, in response to Cd stress.
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Affiliation(s)
- Maryam Seifikalhor
- Department of Plant Biology, College of Science, University of Tehran, Tehran, Iran
| | - Sasan Aliniaeifard
- Photosynthesis laboratory, Department of Horticulture, College of Aburaihan, University of Tehran, Tehran, Iran.
| | - Françoise Bernard
- Faculty of Life Sciences and Biotechnology, Department of Plant Sciences, Shahid Beheshti University G.C., Tehran, Iran
| | - Mehdi Seif
- Photosynthesis laboratory, Department of Horticulture, College of Aburaihan, University of Tehran, Tehran, Iran
| | - Mojgan Latifi
- Faculty of Life Sciences and Biotechnology, Department of Plant Sciences, Shahid Beheshti University G.C., Tehran, Iran
| | - Batool Hassani
- Faculty of Life Sciences and Biotechnology, Department of Plant Sciences, Shahid Beheshti University G.C., Tehran, Iran
| | - Fardad Didaran
- Photosynthesis laboratory, Department of Horticulture, College of Aburaihan, University of Tehran, Tehran, Iran
| | - Massimo Bosacchi
- KWS Gateway Research Center, LLC, BRDG Park at the Danforth Plant Science Center, Saint Louis, USA
| | - Hassan Rezadoost
- Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G.C., Evin, Tehran, Iran
| | - Tao Li
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, Beijing, China
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15
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Xie W, Ashraf U, Zhong D, Lin R, Xian P, Zhao T, Feng H, Wang S, Duan M, Tang X, Mo Z. Application of γ-aminobutyric acid (GABA) and nitrogen regulates aroma biochemistry in fragrant rice. Food Sci Nutr 2019; 7:3784-3796. [PMID: 31763028 PMCID: PMC6848825 DOI: 10.1002/fsn3.1240] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 07/24/2019] [Accepted: 09/14/2019] [Indexed: 12/13/2022] Open
Abstract
The 2-acetyl-1-pyrroline (2AP) is a key aroma compound in fragrant rice. The present study assessed the γ-aminobutyric acid (GABA) and nitrogen (N) application induced regulations in the biochemical basis of rice aroma formation. Four N levels, that is, 0, 0.87, 1.75, and 2.61 g/pot, and two GABA treatments, that is, 0 mg/L (GABA0) and 250 mg/L (GABA250), were applied to three fragrant rice cultivars, that is, Yuxiangyouzhan, Yungengyou 14, and Basmati-385. Results showed that GABA250 increased 2AP, Na, Mn, Zn, and Fe contents by 8.44%, 10.95%, 25.70%, 11.14%, and 43.30%, respectively, under N treatments across cultivars. The GABA250 further enhanced the activities of proline dehydrogenase (PDH), ornithine aminotransferase (OAT) (both at 15 days after heading (d AH), and diamine oxidase (DAO) (at maturity) by 20.36%, 11.24%, and 17.71%, respectively. Significant interaction between GABA and N for Mn, Zn, and Fe contents in grains, proline content in leaves, GABA content in leaves at 15 d AH and maturity stage (MS), Δ1-pyrroline-5-carboxylic acid (P5C) contents in leaves at 15 d AH, and Δ1-pyrroline-5-carboxylate synthase (P5CS), PDH, and OAT activities in leaves at MS was noted. Moreover, the 2AP contents in grains at MS showed a significant and positive correlation with the proline contents in the leaves at 15d AH. In conclusion, GABA250 enhanced the 2AP, Na, Mn, Zn, and Fe contents, as well as the enzyme activities involved in 2AP biosynthesis. Exogenous GABA and N application improved the 2AP contents and nutrient uptake in fragrant rice.
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Affiliation(s)
- Wenjun Xie
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
| | - Umair Ashraf
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
- Department of BotanyDivision of Science and TechnologyUniversity of EducationLahore, PunjabPakistan
| | - Dating Zhong
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
| | - Rongbin Lin
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
| | - Peiqi Xian
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
| | - Tong Zhao
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
| | - Huoyi Feng
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
| | - Shuli Wang
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
- Scientific Observing and Experimental Station of Crop Cultivation in South ChinaMinistry of Agriculture, P. R. ChinaGuangzhouChina
| | - Meiyang Duan
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
- Scientific Observing and Experimental Station of Crop Cultivation in South ChinaMinistry of Agriculture, P. R. ChinaGuangzhouChina
| | - Xiangru Tang
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
- Scientific Observing and Experimental Station of Crop Cultivation in South ChinaMinistry of Agriculture, P. R. ChinaGuangzhouChina
| | - Zhaowen Mo
- College of AgricultureSouth China Agricultural UniversityGuangzhouChina
- Scientific Observing and Experimental Station of Crop Cultivation in South ChinaMinistry of Agriculture, P. R. ChinaGuangzhouChina
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16
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Karuppiah V, Vallikkannu M, Li T, Chen J. Simultaneous and sequential based co-fermentations of Trichoderma asperellum GDFS1009 and Bacillus amyloliquefaciens 1841: a strategy to enhance the gene expression and metabolites to improve the bio-control and plant growth promoting activity. Microb Cell Fact 2019; 18:185. [PMID: 31665025 PMCID: PMC6819339 DOI: 10.1186/s12934-019-1233-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 10/12/2019] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND The consequence of simultaneous and sequential inoculation of T. asperellum and B. amyloliquefaciens cultures with respect to growth rate, differential expression of vital genes and metabolites were examined. RESULTS The competition was observed between T. asperellum and B. amyloliquefaciens under co-cultivation. The proliferation of Trichoderma was reduced in the simultaneous inoculation (TB1) method, possibly due to the fastest growth of Bacillus. Both T. asperellum and B. amyloliquefaciens were proliferated in sequential inoculation method (TB2). The sequential inoculation method (TB2) upregulated the expression of metabolites and vital genes (sporulation, secondary metabolites, mycoparasitism enzymes and antioxidants) in Trichoderma and downregulated in Bacillus and vice versa in co-inoculation method (TB1). The metabolic changes in the co-culture promoted the maize plant growth and defense potential under normal and biotic stress conditions. CONCLUSION The metabolites produced by the co-culture of T. asperellum and B. amyloliquefaciens improved the maize plant growth and defense potential under normal and biotic stress conditions.
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Affiliation(s)
- Valliappan Karuppiah
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, People's Republic of China.,The State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Murugappan Vallikkannu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, People's Republic of China.,The State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Tingting Li
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, People's Republic of China.,The State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Jie Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, People's Republic of China. .,The State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
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17
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Gasparini K, Costa LC, Brito FAL, Pimenta TM, Cardoso FB, Araújo WL, Zsögön A, Ribeiro DM. Elevated CO 2 induces age-dependent restoration of growth and metabolism in gibberellin-deficient plants. PLANTA 2019; 250:1147-1161. [PMID: 31175419 DOI: 10.1007/s00425-019-03208-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 06/03/2019] [Indexed: 06/09/2023]
Abstract
The effect of elevated [CO2] on the growth of tomato plants with reduced gibberellin content is influenced by developmental stage. The impact of increased atmospheric carbon dioxide (CO2) on plants has aroused interest in the last decades. Signaling molecules known as plant hormones are fundamental controllers of plant growth and development. Elevated CO2 concentration ([CO2]) increases plant growth; however, whether plant hormones act as mediators of this effect is still an open question. Here, we show the response to elevated [CO2] in tomato does not require a functional gibberellin (GA) biosynthesis pathway. We compared growth and primary metabolism between wild-type (WT) and GA-deficient mutant (gib-1) plants transferred from ambient (400 ppm) to elevated (750 ppm) [CO2] at two different growth stages (either 21 or 35 days after germination, DAG). Growth, photosynthetic parameters and primary metabolism in the stunted gib-1 plants were restored when they were transferred to elevated [CO2] at 21 DAG. Elevated [CO2] also stimulated growth and photosynthetic parameters in WT plants at 21 DAG; however, only minor changes were observed in the level of primary metabolites. At 35 DAG, on the other hand, elevated [CO2] did not stimulate growth in WT plants and gib-1 mutants showed their characteristic stunted growth phenotype. Taken together, our results reveal that elevated [CO2] enhances growth only within a narrow developmental window, in which GA biosynthesis is dispensable. This finding could be relevant for breeding crops in the face of the expected increases in atmospheric CO2 over the next century.
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Affiliation(s)
- Karla Gasparini
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil
| | - Lucas C Costa
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil
| | - Fred A L Brito
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil
| | - Thaline M Pimenta
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil
| | | | - Wagner L Araújo
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil
| | - Agustín Zsögön
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil.
| | - Dimas M Ribeiro
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brasil
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18
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Masoudi Sadaghiani F, Amini Dehaghi M, Pirzad A, Fotokian MH. Variation in yield and biochemical factors of German chamomile (Matricaria recutita L.) under foliar application of osmolytes and drought stress conditions. JOURNAL OF HERBMED PHARMACOLOGY 2019. [DOI: 10.15171/jhp.2019.15] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Introduction: Chamomile is one of the oldest and most valuable medicinal plants from the Asteraceae family. In addition to pharmaceutical uses, its essential oil is extensively used in perfumery, cosmetics, food industry and aromatherapy. This experiment was conducted with the aim of investigating the effect of osmolytes foliar application on biochemical characteristics, and the yield of German chamomile under drought stress conditions. Methods: The experiment was conducted as a split plot with randomized complete block design with three replications during the 2016-2017 growing season. Three levels of irrigation, 50 (control), 100 (mild stress) and 150 mm (severe stress) evaporation from evaporation pan class A, and spraying treatments, NS (no-spraying), W (distilled water), MeJA (methyl jasmonate), SA (salicylic acid), HA (humic acid), GB (glycine betaine) and GABA (γ-aminobutyric acid) were considered as the main plots and sub-plots, respectively. Results: Analyzed data indicated that proline, total soluble sugars (TSS), and essential oil yield were enhanced with the increase of drought intensity and the maximum amount was registered under severe stress, while the severe drought caused a substantial reduction in protein concentration of leaves and dried flower yield. Proline concentration of leaves significantly increased with exogenously applied spraying treatments under severe drought. All spraying treatments except GB under severe stress, caused higher TSS concentration than those subjected to mild stress. SA, HA, and GABA treated plants had significantly higher protein concentration compared to NS treatment. Plants that treated with GABA had the highest dried flower and essential oil yield. Conclusion: The present study suggests that osmolytes foliar application can ameliorate the detrimental effects of drought on chamomile plant through alteration in yield and biochemical variables.
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Affiliation(s)
| | - Majid Amini Dehaghi
- Department of Agronomy and Plant Breeding, Faculty of Agriculture, Shahed University, Tehran, Iran
| | - Alireza Pirzad
- Department of Agronomy and Plant Breeding, Faculty of Agriculture, Urmia University, Urmia, Iran
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19
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Zhu X, Liao J, Xia X, Xiong F, Li Y, Shen J, Wen B, Ma Y, Wang Y, Fang W. Physiological and iTRAQ-based proteomic analyses reveal the function of exogenous γ-aminobutyric acid (GABA) in improving tea plant (Camellia sinensis L.) tolerance at cold temperature. BMC PLANT BIOLOGY 2019; 19:43. [PMID: 30700249 PMCID: PMC6354415 DOI: 10.1186/s12870-019-1646-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 01/11/2019] [Indexed: 05/04/2023]
Abstract
BACKGROUND Internal γ-Aminobutyric Acid (GABA) interacting with stress response substances may be involved in the regulation of differentially abundant proteins (DAPs) associated with optimum temperature and cold stress in tea plants (Camellia sinensis (L.) O. Kuntze). RESULTS Tea plants supplied with or without 5.0 mM GABA were subjected to optimum or cold temperatures in this study. The increased GABA level induced by exogenous GABA altered levels of stress response substances - such as glutamate, polyamines and anthocyanins - in association with improved cold tolerance. Isobaric tags for relative and absolute quantification (iTRAQ) - based DAPs were found for protein metabolism and nucleotide metabolism, energy, amino acid transport and metabolism other biological processes, inorganic ion transport and metabolism, lipid metabolism, carbohydrate transport and metabolism, biosynthesis of secondary metabolites, antioxidant and stress defense. CONCLUSIONS The iTRAQ analysis could explain the GABA-induced physiological effects associated with cold tolerance in tea plants. Analysis of functional protein-protein networks further showed that alteration of endogenous GABA and stress response substances induced interactions among photosynthesis, amino acid biosynthesis, and carbon and nitrogen metabolism, and the corresponding differences could contribute to improved cold tolerance of tea plants.
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Affiliation(s)
- Xujun Zhu
- College of Horticulture, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu Province 210095 People’s Republic of China
| | - Jieren Liao
- College of Horticulture, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu Province 210095 People’s Republic of China
| | - Xingli Xia
- College of Horticulture, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu Province 210095 People’s Republic of China
| | - Fei Xiong
- College of Horticulture, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu Province 210095 People’s Republic of China
| | - Yue Li
- Wuxi NextCODE Genomics, 288 Fute Zhong Road, Shanghai, 200131 People’s Republic of China
| | - Jiazhi Shen
- College of Horticulture, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu Province 210095 People’s Republic of China
| | - Bo Wen
- College of Horticulture, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu Province 210095 People’s Republic of China
| | - Yuanchun Ma
- College of Horticulture, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu Province 210095 People’s Republic of China
| | - Yuhua Wang
- College of Horticulture, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu Province 210095 People’s Republic of China
| | - Wanping Fang
- College of Horticulture, Nanjing Agricultural University, No.1 Weigang, Nanjing, Jiangsu Province 210095 People’s Republic of China
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20
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Hijaz F, Nehela Y, Killiny N. Application of gamma-aminobutyric acid increased the level of phytohormones in Citrus sinensis. PLANTA 2018; 248:909-918. [PMID: 29961199 DOI: 10.1007/s00425-018-2947-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 06/23/2018] [Indexed: 05/05/2023]
Abstract
In the current study, we showed that exogenous GABA supplementation increases the endogenous GABA level, several amino acids, and phytohormones in citrus plants, suggesting that GABA works in harmony with phytohormones. Gamma-aminobutyric acid (GABA) plays a key role in cytosolic regulation of pH, controlling of carbon and nitrogen metabolism, and protection against biotic and abiotic stresses. Although it is well-known that GABA is implicated in plant defense and it could act as a signaling molecule, its effect on phytohormones is not completely understood. In this study, we investigated the effect of exogenous GABA on citrus phytohormones using gas chromatography-mass spectrometry. A significant increase in endogenous GABA was observed in GABA-treated plants. The highest increase in GABA was recorded in plants treated with 10 mM 7 days post-treatment. In addition, we observed a moderate increase in several amino acids including glycine, L-alanine, L-proline, L-asparagine, and L-glutamine. The levels of benzoic acid, cinnamic acid, salicylic acid, trans-jasmonic acid, indole acetic acid, indole propionic acid, and abscisic acid were significantly increased in GABA-treated plants compared to the control. The gene expression showed that GABA transaminase (GABA-T) and succinic semialdehyde dehydrogenase (SSADH) were induced in GABA-treated plants, indicating a conversion of GABA to succinate. In addition, the gene expression of the regulatory enzymes of the TCA cycle (malate dehydrogenase and succinic dehydrogenase) was upregulated in GABA-treated plants, indicating an induction of respiration. In agreement with the chemical analysis, the gene expression results showed that most of the genes implicated in the biosynthesis of phytohormones were also upregulated in GABA-treated plants. Our results indicated that GABA works in harmony with phytohormones and suggested that regulation of phytohormones by exogenous GABA could play a key role in reducing plant stress.
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Affiliation(s)
- Faraj Hijaz
- Department of Plant Pathology, Citrus Research and Education Center, IFAS, University of Florida, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA
| | - Yasser Nehela
- Department of Plant Pathology, Citrus Research and Education Center, IFAS, University of Florida, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA
| | - Nabil Killiny
- Department of Plant Pathology, Citrus Research and Education Center, IFAS, University of Florida, 700 Experiment Station Road, Lake Alfred, FL, 33850, USA.
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Waqas MA, Khan I, Akhter MJ, Noor MA, Ashraf U. Exogenous application of plant growth regulators (PGRs) induces chilling tolerance in short-duration hybrid maize. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:11459-11471. [PMID: 28316047 DOI: 10.1007/s11356-017-8768-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 03/08/2017] [Indexed: 05/15/2023]
Abstract
Chilling stress hampers the optimal performance of maize under field conditions precipitously by inducing oxidative stress. To confer the damaging effects of chilling stress, the present study aimed to investigate the effects of some natural and synthetic plant growth regulators, i.e., salicylic acid (SA), thiourea (TU), sorghum water extract (SWE), and moringa leaf extract (MLE) on chilling stress tolerance in autumn maize hybrid. Foliar application of growth regulators at low concentrations was carried out at six leaf (V6) and tasseling stages. An increase in crop growth rate (CGR), leaf area index (LAI), leaf area duration (LAD), plant height (PH), grain yield (GY), and total dry matter accumulation (TDM) was observed in exogenously applied plants as compared to control. In addition, improved physio-biochemical, phenological, and grain nutritional quality attributes were noticed in foliar-treated maize plots as compared to non-treated ones. SA-treated plants reduced 20% electrolyte leakage in cell membrane against control. MLE and SA were proved best in improving total phenolic, relative water (19-23%), and chlorophyll contents among other applications. A similar trend was found for photosynthetic and transpiration rates, whereas MLE and SWE were found better in improving CGR, LAI, LAD, TDM, PH, GY, grains per cob, 1000 grain weight, and biological yield among all treatments including control. TU and MLE have significantly reduced the duration in phenological events of crop at the reproductive stage. MLE, TU, and SA also improved the grain protein, oil, and starch contents as compared to control. Enhanced crop water productivity was also observed in MLE-treated plants. Economic analysis suggested that MLE and SA applications were more economical in inducing chilling stress tolerance under field conditions. Although eliciting behavior of all growth regulators improved morpho-physiological attributes against suboptimal temperature stress conditions, MLE and SA acted as leading agents which proved to be better stress alleviators by improving plant physio-biochemical attributes and maize growth.
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Affiliation(s)
| | - Imran Khan
- Department of Agronomy, University of Agriculture, Faisalabad, 38040, Pakistan
| | | | - Mehmood Ali Noor
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Key Laboratory of Crop Physiology and Ecology, Ministry of Agriculture, Beijing, 100081, China.
| | - Umair Ashraf
- Department of Crop science and Technology, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
- Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture, Guangzhou, 510642, China
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