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Niu L, Wang Y, Zhou Y, Fei J, Sun C, Li ZH, Cheng H. The inputs of autochthonous organic carbon driven by mangroves reduce metal mobility and bioavailability in intertidal regions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172964. [PMID: 38705289 DOI: 10.1016/j.scitotenv.2024.172964] [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: 01/23/2024] [Revised: 04/30/2024] [Accepted: 05/01/2024] [Indexed: 05/07/2024]
Abstract
The significance of mangroves in carbon storage is widely acknowledged. However, the potential role of carbon enhancement driven by mangroves in mitigating the risk of metal exposure remains unclear. In this study, a natural mangrove reserve located in Futian was selected to investigate the potential role of autochthonous organic carbon on metal bioavailability. The presence of mangroves seemed to have little effect on the accumulations of Cu(II), Zn(II), Cr(VI/III), Pb(II), and Ni(II) in surface sediments. Metal mobility and bioavailability, however, were found to be directly influenced by the presence of mangroves. Compared with mudflat, mangrove sediments exhibited an obvious in the bioavailability of Cu(II), Zn(II), Cr(VI/III), Pb(II), and Ni(II) by 19-79 %, with the highest reduction occurring in the interior of mangroves dominated by K. obovata. Mangroves also significantly enhanced the accumulation of organic carbon in sediments, regardless of carbon components. Moreover, the results from random forest analysis further showed that autochthonous organic carbon was the most important carbon component that negatively related to metal bioavailability. In summary, this is the first study to provide a linkage between mangrove cover and increased autochthonous organic carbon input, which decreases metal bioavailability. The present data also suggest that mangroves are an efficient natural barrier to alleviate the risk of metal exposure in intertidal regions.
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Affiliation(s)
- Linjing Niu
- Marine College, Shandong University, Weihai 264209, China; State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Youshao Wang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Yanwu Zhou
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Jiao Fei
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Cuici Sun
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Zhi-Hua Li
- Marine College, Shandong University, Weihai 264209, China.
| | - Hao Cheng
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
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Pan C, Zhang M, Chen J, Lu H, Zhao X, Chen X, Wang L, Guo P, Liu S. miR397 regulates cadmium stress response by coordinating lignin polymerization in the root exodermis in Kandelia obovata. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134313. [PMID: 38669927 DOI: 10.1016/j.jhazmat.2024.134313] [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: 02/29/2024] [Revised: 04/08/2024] [Accepted: 04/14/2024] [Indexed: 04/28/2024]
Abstract
Secondary lignification of the root exodermis of Kandelia obovata is crucial for its response to adversity such as high salinity and anaerobic environment, and this lignification is also effective in blocking cadmium transport to the roots. However, how the differences in lignification of root exodermis at different developmental stages respond to Cd stress and its regulatory mechanisms have not been revealed. In this study, after analyzing the root structure and cell wall thickness using a Phenom scanning electron microscope as well as measuring cadmium content in the root cell wall, we found that the exodermis of young and mature roots of K. obovata responded to Cd stress through the polymerization of different lignin monomers, forming two different mechanisms: chelation and blocking. Through small RNA sequencing, RLM-5'-RACE and dual luciferase transient expression system, we found that miR397 targets and regulates KoLAC4/17/7 expression. The expression of KoLAC4/17 promoted the accumulation of guaiacyl lignin during lignification and enhanced the binding of cadmium to the cell wall. Meanwhile, KoLAC7 expression promotes the accumulation of syringyl lignin during lignification, which enhances the obstruction of cadmium and improves the tolerance to cadmium. These findings enhance our understanding of the molecular mechanisms underlying the differential lignification of the root exodermis of K. obovata in response to cadmium stress, and provide scientific guidance for the conservation of mangrove forests under heavy metal pollution.
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Affiliation(s)
- Chenglang Pan
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; Technology Innovation Center for Monitoringand Restoration Engineering of Ecological Fragile Zonein Southeast China, Ministry of Natural Resources, Fuzhou 350001, China.
| | - Mingxiong Zhang
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jianming Chen
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; Technology Innovation Center for Monitoringand Restoration Engineering of Ecological Fragile Zonein Southeast China, Ministry of Natural Resources, Fuzhou 350001, China
| | - Haoliang Lu
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen 361102, PR China
| | - Xuemei Zhao
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China
| | - Xiaofeng Chen
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China
| | - Lu Wang
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; Technology Innovation Center for Monitoringand Restoration Engineering of Ecological Fragile Zonein Southeast China, Ministry of Natural Resources, Fuzhou 350001, China
| | - Pingping Guo
- Fujian Minjiang River Estuary Wetland National Nature Reserve Administrative Office, Fuzhou 350001, China
| | - Shuyu Liu
- Fujian Key Laboratory on Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou 350108, China; College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Dong Q, Wu Y, Wang H, Li B, Huang R, Li H, Tao Q, Li Q, Tang X, Xu Q, Luo Y, Wang C. Integrated morphological, physiological and transcriptomic analyses reveal response mechanisms of rice under different cadmium exposure routes. JOURNAL OF HAZARDOUS MATERIALS 2024; 466:133688. [PMID: 38310845 DOI: 10.1016/j.jhazmat.2024.133688] [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: 11/06/2023] [Revised: 01/04/2024] [Accepted: 01/30/2024] [Indexed: 02/06/2024]
Abstract
Rice (Oryza sativa) is one of the major cereal crops and takes up cadmium (Cd) more readily than other crops. Understanding the mechanism of Cd uptake and defense in rice can help us avoid Cd in the food chain. However, studies comparing Cd uptake, toxicity, and detoxification mechanisms of leaf and root Cd exposure at the morphological, physiological, and transcriptional levels are still lacking. Therefore, experiments were conducted in this study and found that root Cd exposure resulted in more severe oxidative and photosynthetic damage, lower plant biomass, higher Cd accumulation, and transcriptional changes in rice than leaf Cd exposure. The activation of phenylpropanoids biosynthesis in both root and leaf tissues under different Cd exposure routes suggests that increased lignin is the response mechanism of rice under Cd stress. Moreover, the roots of rice are more sensitive to Cd stress and their adaptation responses are more pronounced than those of leaves. Quantitative PCR revealed that OsPOX, OsCAD, OsPAL and OsCCR play important roles in the response to Cd stress, which further emphasize the importance of lignin. Therefore, this study provides theoretical evidence for future chemical and genetic regulation of lignin biosynthesis in crop plants to reduce Cd accumulation.
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Affiliation(s)
- Qin Dong
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Yingjie Wu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China.
| | - Haidong Wang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Bing Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Rong Huang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Huanxiu Li
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
| | - Qi Tao
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Qiquan Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoyan Tang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Qiang Xu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Youlin Luo
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Changquan Wang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China.
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Gaddam SR, Sharma A, Trivedi PK. miR397b-LAC2 module regulates cadmium stress response by coordinating root lignification and copper homeostasis in Arabidopsis thaliana. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133100. [PMID: 38042003 DOI: 10.1016/j.jhazmat.2023.133100] [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: 09/04/2023] [Revised: 11/20/2023] [Accepted: 11/24/2023] [Indexed: 12/04/2023]
Abstract
Non-essential heavy metal cadmium (Cd) is toxic to plants and animals. Cadmium affects plant photosynthesis, respiration, and causes water imbalance and may lead to plant death. Cadmium induces toxicity by interfering with the essential metal copper (Cu) homeostasis, which affects plant nutrition. Though root lignin biosynthesis is positively regulated by Cd stress, the underlying mechanisms promoting lignin accumulation and controlling Cd-induced Cu limitation responses are unclear. Here, we elucidated the role of Cu-responsive microRNA (miR397b) in Arabidopsis thaliana plants for Cd stress by targeting the LACCASE2 (LAC2) gene. This study demonstrated the fundamental mechanism of miR397b-mediated Cd stress response by enhancing the lignin content in root tissues. We developed miR397b over-expressing plants, which showed considerable Cd stress tolerance. Plants with knockdown function of LAC2 also showed significant tolerance to Cd stress. miR397b overexpressing and lac2 mutant plants showed root reduction, higher biomass and chlorophyll content, and significantly lower Reactive Oxygen Species (ROS). This study demonstrated the miR397b-mediated Cd stress response in Arabidopsis by enhancing the lignin content in root tissues. We conclude that modulation in miR397b can be potentially used for improving plants for Cd tolerance and Cu homeostasis.
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Affiliation(s)
- Subhash Reddy Gaddam
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India; CSIR, Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), P.O. CIMAP, Near Kukrail Picnic Spot, Lucknow 226 015, India
| | - Ashish Sharma
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; CSIR, Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), P.O. CIMAP, Near Kukrail Picnic Spot, Lucknow 226 015, India
| | - Prabodh Kumar Trivedi
- CSIR-National Botanical Research Institute, Council of Scientific and Industrial Research (CSIR-NBRI), Rana Pratap Marg, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India; CSIR, Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), P.O. CIMAP, Near Kukrail Picnic Spot, Lucknow 226 015, India.
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5
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Kondak S, Janovszky P, Szőllősi R, Molnár Á, Oláh D, Adedokun OP, Dimitrakopoulos PG, Rónavári A, Kónya Z, Erdei L, Galbács G, Kolbert Z. Nickel oxide nanoparticles induce cell wall modifications, root anatomical changes, and nitrosative signaling in ecotypes of Ni hyperaccumulator Odontarrhena lesbiaca. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 341:122874. [PMID: 37949159 DOI: 10.1016/j.envpol.2023.122874] [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: 07/12/2023] [Revised: 09/22/2023] [Accepted: 11/03/2023] [Indexed: 11/12/2023]
Abstract
The industrial application and environmental release of nickel oxide NPs (NiO NPs) is increasing, but the details of their relationship with plants are largely unknown. In this work, the cellular, tissue, organ, and molecular level responses of three ecotypes of Ni hyperaccumulator Odontarrhena lesbiaca grown in the presence of high doses of NiO NP (250 mg/L and 500 mg/L) were studied. All three ecotypes showed a similar accumulation of Ni in the presence of nano Ni, and in the case of NiO NPs, the root-to-shoot Ni translocation was slighter compared to the bulk Ni. In all three ecotypes, the walls of the root cells effectively prevented internalization of NiO NPs, providing cellular defense against Ni overload. Exposure to NiO NP led to an increase in cortex thickness and the deposition of lignin-suberin and pectin in roots, serving as a tissue-level defense mechanism against excessive Ni. Exposure to NiO NP did not modify or cause a reduction in some biomass parameters of the Ampeliko and Loutra ecotypes, while it increased all parameters in Olympos. The free salt form of Ni exerted more negative effects on biomass production than the nanoform, and the observed effects of NiO NPs can be attributed to the release of Ni ions. Nitric oxide and peroxynitrite levels were modified by NiO NPs in an ecotype-dependent manner. The changes in the abundance and activity of S-nitrosoglutathione reductase protein triggered by NiO NPs suggest that the enzyme is regulated by NiO NPs at the post-translational level. The NiO NPs slightly intensified protein tyrosine nitration, and the slight differences between the ecotypes were correlated with their biomass production in the presence of NiO NPs. Overall, the Odontarrhena lesbiaca ecotypes exhibited tolerance to NiO NPs at the cellular, tissue, organ/organism and molecular levels, demonstrating various defense mechanisms and changes in the metabolism of reactive nitrogen species metabolism and nitrosative protein modification.
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Affiliation(s)
- Selahattin Kondak
- Department of Plant Biology, University of Szeged, Közép fasor 52., 6726, Szeged, Hungary; Doctoral School of Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., 6726, Szeged, Hungary.
| | - Patrick Janovszky
- Department of Inorganic, Organic and Analytical Chemistry, University of Szeged, Dóm tér 7-8., 6720, Szeged, Hungary
| | - Réka Szőllősi
- Department of Plant Biology, University of Szeged, Közép fasor 52., 6726, Szeged, Hungary
| | - Árpád Molnár
- Department of Plant Biology, University of Szeged, Közép fasor 52., 6726, Szeged, Hungary
| | - Dóra Oláh
- Department of Plant Biology, University of Szeged, Közép fasor 52., 6726, Szeged, Hungary; Doctoral School of Biology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52., 6726, Szeged, Hungary
| | | | | | - Andrea Rónavári
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1., 6720, Szeged, Hungary
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1., 6720, Szeged, Hungary
| | - László Erdei
- Department of Plant Biology, University of Szeged, Közép fasor 52., 6726, Szeged, Hungary
| | - Gábor Galbács
- Department of Inorganic, Organic and Analytical Chemistry, University of Szeged, Dóm tér 7-8., 6720, Szeged, Hungary
| | - Zsuzsanna Kolbert
- Department of Plant Biology, University of Szeged, Közép fasor 52., 6726, Szeged, Hungary
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Chang LF, Fei J, Wang YS, Ma XY, Zhao Y, Cheng H. Comparative Analysis of Cd Uptake and Tolerance in Two Mangrove Species ( Avicennia marina and Rhizophora stylosa) with Distinct Apoplast Barriers. PLANTS (BASEL, SWITZERLAND) 2023; 12:3786. [PMID: 38005683 PMCID: PMC10674663 DOI: 10.3390/plants12223786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 10/29/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023]
Abstract
Mangrove plants demonstrate an impressive ability to tolerate environmental pollutants, but excessive levels of cadmium (Cd) can impede their growth. Few studies have focused on the effects of apoplast barriers on heavy metal tolerance in mangrove plants. To investigate the uptake and tolerance of Cd in mangrove plants, two distinct mangrove species, Avicennia marina and Rhizophora stylosa, are characterized by unique apoplast barriers. The results showed that both mangrove plants exhibited the highest concentration of Cd2+ in roots, followed by stems and leaves. The Cd2+ concentrations in all organs of R. stylosa consistently exhibited lower levels than those of A. marina. In addition, R. stylosa displayed a reduced concentration of apparent PTS and a smaller percentage of bypass flow when compared to A. marina. The root anatomical characteristics indicated that Cd treatment significantly enhanced endodermal suberization in both A. marina and R. stylosa roots, and R. stylosa exhibited a higher degree of suberization. The transcriptomic analysis of R. stylosa and A. marina roots under Cd stress revealed 23 candidate genes involved in suberin biosynthesis and 8 candidate genes associated with suberin regulation. This study has confirmed that suberized apoplastic barriers play a crucial role in preventing Cd from entering mangrove roots.
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Affiliation(s)
- Li-Fang Chang
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (L.-F.C.); (J.F.); (Y.-S.W.); (X.-Y.M.)
- College of Life Science and Agroforestry, Qiqihaer University, Qiqihaer 161006, China
| | - Jiao Fei
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (L.-F.C.); (J.F.); (Y.-S.W.); (X.-Y.M.)
| | - You-Shao Wang
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (L.-F.C.); (J.F.); (Y.-S.W.); (X.-Y.M.)
| | - Xiao-Yu Ma
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (L.-F.C.); (J.F.); (Y.-S.W.); (X.-Y.M.)
- College of Life Science and Agroforestry, Qiqihaer University, Qiqihaer 161006, China
| | - Yan Zhao
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (L.-F.C.); (J.F.); (Y.-S.W.); (X.-Y.M.)
- College of Life Science and Agroforestry, Qiqihaer University, Qiqihaer 161006, China
| | - Hao Cheng
- South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; (L.-F.C.); (J.F.); (Y.-S.W.); (X.-Y.M.)
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Yang H, Yu H, Wang S, Bayouli IT, Huang H, Ye D, Zhang X, Liu T, Wang Y, Zheng Z, Meers E, Li T. Root radial apoplastic transport contributes to shoot cadmium accumulation in a high cadmium-accumulating rice line. JOURNAL OF HAZARDOUS MATERIALS 2023; 460:132276. [PMID: 37625294 DOI: 10.1016/j.jhazmat.2023.132276] [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: 05/24/2023] [Revised: 08/01/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023]
Abstract
Radial transport of cadmium (Cd) in roots governs the amount of Cd loaded into xylem vessels, where Cd ions are translocated upward into shoots, while the mechanism of differential Cd radial transport between the high Cd-accumulating rice line Lu527-8 and the normal rice line Lu527-4 remains ambiguous. A higher Cd distribution in cross sections and root apoplast and higher bypass flow of Cd were found in Lu527-8, explaining a greater Cd translocation through the apoplastic pathway. The lower relative area of the epidermis and the constant relative area of the cortex in Lu527-8 opened-up root radial transport for Cd. Deposition of apoplastic barriers (Casparian strips and suberin lamellae) was stimulated by Cd, which effectively prevented Cd from entering the stele through the apoplastic pathway. In Lu527-8, apoplastic barriers were further from the root apex with lower expression of genes responsible for biosynthesis of Casparian strips and suberin lamellae, enhancing radial transport of Cd. Our data revealed that the higher radial apoplastic transport of Cd played an integral role in Cd translocation, contributed to a better understanding of the mechanism involved in high Cd accumulation in Lu527-8 and helped achieve the practical application of phytoextraction.
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Affiliation(s)
- Huan Yang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China; Lab for bioresource recovery, Faculty of Bioscience Engineering, Ghent University, Ghent 9000, Belgium
| | - Haiying Yu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Shengwang Wang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Ines Terwayet Bayouli
- Lab for bioresource recovery, Faculty of Bioscience Engineering, Ghent University, Ghent 9000, Belgium
| | - Huagang Huang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Daihua Ye
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Xizhou Zhang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Tao Liu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Yongdong Wang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Zicheng Zheng
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China
| | - Erik Meers
- Lab for bioresource recovery, Faculty of Bioscience Engineering, Ghent University, Ghent 9000, Belgium
| | - Tingxuan Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
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8
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Zhang LD, Song LY, Dai MJ, Liu JY, Li J, Xu CQ, Guo ZJ, Song SW, Liu JW, Zhu XY, Zheng HL. Inventory of cadmium-transporter genes in the root of mangrove plant Avicennia marina under cadmium stress. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132321. [PMID: 37597395 DOI: 10.1016/j.jhazmat.2023.132321] [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: 04/28/2023] [Revised: 08/07/2023] [Accepted: 08/15/2023] [Indexed: 08/21/2023]
Abstract
Mangrove Avicennia marina has the importantly potential for cadmium (Cd) pollution remediation in coastal wetlands. Unfortunately, the molecular mechanisms and transporter members for Cd uptake by the roots of A. marina are not well documented. In this study, photosynthetic and phenotypic analysis indicated that A. marina is particularly tolerant to Cd. The content and flux analysis indicated that Cd is mainly retained in the roots, with greater Cd influx in fine roots than that in coarse roots, and higher Cd influx in the root meristem zone as well. Using transcriptomic analysis, a total of 5238 differentially expressed genes were identified between the Cd treatment and control group. Moreover, we found that 54 genes were responsible for inorganic ion transport. Among these genes, AmHMA2, AmIRT1, and AmPCR2 were localized in the plasma membrane and AmZIP1 was localized in both plasma membrane and cytoplasm. All above gene encoding transporters showed significant Cd transport activities using function assay in yeast cells. In addition, the overexpression of AmZIP1 or AmPCR2 in Arabidopsis improved the Cd tolerance of transgenic plants. This is particularly significant as it provides insight into the molecular mechanism for Cd uptake by the roots of mangrove plants and a theoretical basis for coastal wetland phytoremediation.
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Affiliation(s)
- Lu-Dan Zhang
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Ling-Yu Song
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Ming-Jin Dai
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Jin-Yu Liu
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Jing Li
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Chao-Qun Xu
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Ze-Jun Guo
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Shi-Wei Song
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Jing-Wen Liu
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Xue-Yi Zhu
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China
| | - Hai-Lei Zheng
- Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian 361005, PR China.
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Serafini RJM, Arreghini S, Troiani HE, de Iorio ARF. Copper, zinc, and chromium accumulation in aquatic macrophytes from a highly polluted river of Argentina. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:31242-31255. [PMID: 36443549 DOI: 10.1007/s11356-022-24380-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 11/19/2022] [Indexed: 06/16/2023]
Abstract
The aims of this study were to assess Cu, Zn, and Cr pollution in a highly polluted river in Argentina (Matanza-Riachuelo) and to evaluate tolerance strategies and toxic effects in aquatic macrophytes. Chemical techniques were used to assess the bioavailability of these metals and to evaluate their uptake and translocation by plants. The ultrastructure of the roots of a free-floating plant (Eichhornia crassipes) and the leaves of an emergent macrophyte (Sagittaria montevidensis) was examined using transmission electron microscopy. In the lower basin of the river, the highest concentrations of total heavy metals were detected in water (179 µgZn/g; 54 µgCu/g; 240 µgCr/g) and sediments (1499 µgZn/g; 393 µgCu/g; 4886 µgCr/g). In the upper basin of the river, low percentages of Zn and Cu (8 to 25%) were extracted with DTPA and EDTA, probably due to the lithogenic origin of these metals. Higher extraction percentages (24 to 66%) were obtained in the lower basin, in accordance with anthropogenic pollution. For Cr, extraction percentages were low in the upper basin of the river (< 4.5%) and extremely low in the lower basin (< 0.03%). In S. montevidensis, the BCF (bioconcentration factor) and TF (translocation factor) indexes were compatible with heavy metal exclusion mechanisms in sediments, whereas in the E. crassipes, root compartmentalization could be the main tolerance strategy. The leaves of S. montevidensis showed no evidence of damage, whereas ultrastructural alterations (plasmolyzed cells, disorganized membranes) were observed in E. crassipes.
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Affiliation(s)
- Roberto José María Serafini
- Departamento de Recursos Naturales y Ambiente, Cátedra de Química Inorgánica y Analítica, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Av. San Martin 4453, CP1417, Buenos Aires, Argentina.
| | - Silvana Arreghini
- Departamento de Recursos Naturales y Ambiente, Cátedra de Química Inorgánica y Analítica, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Av. San Martin 4453, CP1417, Buenos Aires, Argentina
| | - Horacio Esteban Troiani
- Departamento de Caracterización de Materiales, Centro Atómico Bariloche, CNEA-CONICET, Universidad Nacional de Río Negro, Av. Bustillo 9500, CP8400, San Carlos de Bariloche, Argentina
| | - Alicia Rosa Fabrizio de Iorio
- Departamento de Recursos Naturales y Ambiente, Cátedra de Química Inorgánica y Analítica, Facultad de Agronomía, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Av. San Martin 4453, CP1417, Buenos Aires, Argentina
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10
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Lang T, Tam NFY, Hussain M, Ke X, Wei J, Fu Y, Li M, Huang X, Huang S, Xiong Z, Wu K, Li F, Chen Z, Hu Z, Gao C, Yang Q, Zhou H. Dynamics of heavy metals during the development and decomposition of leaves of Avicennia marina and Kandelia obovata in a subtropical mangrove swamp. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 855:158700. [PMID: 36113807 DOI: 10.1016/j.scitotenv.2022.158700] [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: 07/01/2022] [Revised: 09/04/2022] [Accepted: 09/07/2022] [Indexed: 06/15/2023]
Abstract
In mangrove wetlands, leaves make up a high proportion of the plant biomass and can accumulate heavy metals from contaminated sediment. Despite this, it is still unclear how heavy metal concentrations in leaves change as they develop and how metals in senescence leaves are recycled back into the mangrove ecosystems during decomposition. The present study aims to investigate the dynamics of six heavy metals (Cu, Zn, Cr, Ni, Cd, and Pb) in leaves of two common mangrove plants, Avicennia marina and Kandelia obovata, at different stages of development (young, mature, and senescent) and leaf litter decomposition (from 0 to 20 weeks). Based on litterbag experiments in a subtropical mangrove swamp, both plant species showed similar trends in alternations of the six heavy metals during leaf development, that was, decreased in Cu and Zn but increased in Pb, while Cr, Ni, and Cd remained steady. All heavy metals in litter gradually increased in concentration during decomposition. By the end of the 20-weeks decomposition, the concentrations of Cu, Zn, and Cd in decayed leaves were comparable to those in sediment, with Cu, Zn, and Cd at approximately 18, 75, and 0.2 mg·kg-1, respectively, while Cr (66 mg·kg-1), Ni (65 mg·kg-1), and Pb (55 mg·kg-1) were lower than those in sediment, indicating that metals were not retained in litter but recycled back to the sediment. Tannins in mangrove leaf litter might chelate heavy metals, affecting their migration and transformation of heavy metals in estuarine mangrove wetlands. The findings of our study provide insight into the interactions between toxic heavy metals and mangrove plant species during leaf development, representing the first example of how most metals would be retained in leaf litter during decomposition, thereby reducing their release to estuarine and marine ecosystems.
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Affiliation(s)
- Tao Lang
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; College of Physics and Optoelectronic Engineering, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China
| | - Nora Fung-Yee Tam
- Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China; School of Science and Technology, The Hong Kong Metropolitan University, Ho Man Tin, Kowloon 999077, Hong Kong, China
| | - Muzammil Hussain
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; College of Physics and Optoelectronic Engineering, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China
| | - Xinran Ke
- Institute of Ecology, College of Urban and Environmental Sciences, Peking University, 100091 Beijing, China
| | - Jian Wei
- Institute of Ecology, College of Urban and Environmental Sciences, Peking University, 100091 Beijing, China
| | - Yijian Fu
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China
| | - Mingdang Li
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China
| | - Xiazi Huang
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China
| | - Shuyan Huang
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China
| | - Zhangjing Xiong
- Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China
| | - Kunhua Wu
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China
| | - Fenglan Li
- Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China; School of Science and Technology, The Hong Kong Metropolitan University, Ho Man Tin, Kowloon 999077, Hong Kong, China
| | - Zhiteng Chen
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China
| | - Zhangli Hu
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China
| | - Changjun Gao
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520, China
| | - Qiong Yang
- Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China
| | - Haichao Zhou
- MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area & Shenzhen Key Laboratory of Marine Bio-Resource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, 518060 Shenzhen, China; Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, Guangdong Neilingding Futian National Nature Reserve, 518040 Shenzhen, China.
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11
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Liang F, Hu J, Liu B, Li L, Yang X, Bai C, Tan X. New Evidence of Semi-Mangrove Plant Barringtonia racemosa in Soil Clean-Up: Tolerance and Absorption of Lead and Cadmium. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:12947. [PMID: 36232247 PMCID: PMC9566725 DOI: 10.3390/ijerph191912947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/04/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Mangrove plants play an important role in the remediation of heavy-metal-contaminated estuarine and coastal areas; Barringtonia racemosa is a typical semi-mangrove plant. However, the effect of heavy metal stress on this plant has not been explored. In this study, tolerance characteristics and the accumulation profile of cadmium (Cd) and lead (Pb) in B. racemosa were evaluated. The results indicated that B. racemosa exhibited a high tolerance in single Cd/Pb and Cd + Pb stress, with a significant increase in biomass yield in all treatment groups, a significant increase in plant height, leaf area, chlorophyll and carotenoid content in most treatment groups and without significant reduction of SOD, POD, MDA, proline content, Chl a, Chl b, Chl a + b, Car, ratio of Chl a:b and ratio of Car:Chl (a + b). Cd and Pb mainly accumulated in the root (≥93.43%) and the content of Cd and Pb in B. racemosa was root > stem > leaf. Pb showed antagonistic effects on the Cd accumulation in the roots and Cd showed antagonistic or synergistic effects on the Pb accumulation in the roots, which depended on the concentration of Cd and Pb. There was a significant synergistic effect of Cd and Pb enrichment under a low Cd and Pb concentration treatment. Thus, phytoremediation could potentially use B. racemosa for Cd and Pb.
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Affiliation(s)
- Fang Liang
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
- Key Laboratory for Conservation and Utilization of Subtropical Bio-Resources, Education Department of Guangxi Zhuang Autonomous Region, Yulin Normal University, Yulin 537000, China
| | - Ju Hu
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
- Key Laboratory for Conservation and Utilization of Subtropical Bio-Resources, Education Department of Guangxi Zhuang Autonomous Region, Yulin Normal University, Yulin 537000, China
| | - Bing Liu
- Forestry of College, Guangxi University, Nanning 530001, China
| | - Lin Li
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
| | - Xiuling Yang
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
| | - Caihong Bai
- College of Biology and Pharmacy, Yulin Normal University, Yulin 537000, China
- Key Laboratory for Conservation and Utilization of Subtropical Bio-Resources, Education Department of Guangxi Zhuang Autonomous Region, Yulin Normal University, Yulin 537000, China
| | - Xiaohui Tan
- Guangxi Subtropical Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530001, China
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12
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Xiao B, Huang J, Guo J, Lu X, Zhu L, Wang J, Zhou C. Flooding-induced rhizosphere Clostridium assemblage prevents root-to-shoot cadmium translocation in rice by promoting the formation of root apoplastic barriers. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129619. [PMID: 35868081 DOI: 10.1016/j.jhazmat.2022.129619] [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: 04/07/2022] [Revised: 07/06/2022] [Accepted: 07/14/2022] [Indexed: 06/15/2023]
Abstract
Water managements are the most effective agricultural practices for restraining cadmium (Cd) uptake and translocation in rice, which closely correlated with rhizosphere assembly of beneficial microbiome. However, the role of the assemblage of specific microbiota in controlling root-to-shoot Cd translocation in rice remains scarcely clear. The aim of this study was to ascertain how water managements shaped rhizosphere microbiome and mediated root-to-shoot Cd translocation. To disentangle the acting mechanisms of water managements, we performed an experiment monitoring Cd uptake and transport in rice and changes in soil microbial communities in response to continuously flooding and moistening irrigation. Continuously flooding changed rhizosphere microbial communities, leading to the increased abundance of anaerobic bacteria such as Clostridium populations. Weighted gene co-expression network analysis (WGCNA) showed that a dominant OTU163, corresponding to Clostridium sp. CSP1, exhibited a strong negative correlation with root-to-shoot Cd translocation. An integrated analysis of transcriptome and metabolome further indicated that the Clostridium-secreted butyric acid was involved in the regulation of phenylpropanoid pathway in rice roots. The formation of endodermal suberized barriers and lignified xylems was remarkably enhanced in the Clostridium-treated roots, which led to more Cd retained in root cell wall and less Cd in the xylem sap. Collectively, our results indicate that the development of root apoplastic barriers can be orchestrated by beneficial Clostridium strains that are assembled by host plants grown under flooding regime, thereby inhibiting root-to-shoot Cd translocation.
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Affiliation(s)
- Bing Xiao
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China
| | - Jiameng Huang
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China
| | - Jiansheng Guo
- School of Medicine, Zhejiang University, Hangzhou 310058, China; School of Life Science and Technology, Tongji University, Shanghai 200092, China
| | - Xiaoming Lu
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China
| | - Lin Zhu
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China; School of Life Science and Technology, Tongji University, Shanghai 200092, China.
| | - Jianfei Wang
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China
| | - Cheng Zhou
- Key Lab of Bio-Organic Fertilizer Creation, Ministry of Agriculture and Rural Affairs, Anhui Science and Technology University, Bengbu 233100, China; Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China.
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13
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Chen P, Song Y, Liu X, Xiao L, Bu C, Liu P, Zhao L, Ingvarsson PK, Wu HX, El-Kassaby YA, Zhang D. LncRNA PMAT-PtoMYB46 module represses PtoMATE and PtoARF2 promoting Pb 2+ uptake and plant growth in poplar. JOURNAL OF HAZARDOUS MATERIALS 2022; 433:128769. [PMID: 35364535 DOI: 10.1016/j.jhazmat.2022.128769] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/13/2022] [Accepted: 03/21/2022] [Indexed: 06/14/2023]
Abstract
Lead (Pb2+) is one of the most toxic heavy-metal contaminants. Fast-growing woody plants with substantial biomass are ideal for bioremediation. However, the transcriptional regulation of Pb2+ uptake in woody plants remains unclear. Here, we identified 226 Pb2+-induced, differentially expressed long non-coding RNAs (DELs) in Populus tomentosa. Functional annotation revealed that these DELs mainly regulate carbon metabolism, biosynthesis of secondary metabolites, energy metabolism, and signal transduction through their potential target genes. Association and epistasis analysis showed that the lncRNA PMAT (Pb2+-induced multidrug and toxic compound extrusion (MATE) antisense lncRNA) interacts epistatically with PtoMYB46 to regulate leaf dry weight, photosynthesis rate, and transketolase activity. Genetic transformation and molecular assays showed that PtoMYB46 reduces the expression of PtoMATE directly or indirectly through PMAT, thereby reducing the secretion of citric acid (CA) and ultimately promoting Pb2+ uptake. Meanwhile, PtoMYB46 targets auxin response factor 2 (ARF2) and reduces its expression, thus positively regulating plant growth. We concluded that the PMAT-PtoMYB46-PtoMATE-PtoARF2 regulatory module control Pb2+ tolerance, uptake, and plant growth. This study demonstrates the involvement of lncRNAs in response to Pb2+ in poplar, yielding new insight into the potential for developing genetically improved woody plant varieties for phytoremediating lead-contaminated soils.
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Affiliation(s)
- Panfei Chen
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; School of Landscape Architecture, Beijing University of Agriculture, Beijing 102206, PR China
| | - Yuepeng Song
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China
| | - Xin Liu
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China
| | - Liang Xiao
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China
| | - Chenhao Bu
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China
| | - Peng Liu
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China
| | - Lei Zhao
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China
| | - Pär K Ingvarsson
- Linnean Center for Plant Biology, Department of Plant Biology, Swedish University of Agricultural Sciences, Box 7080, SE-750 07 Uppsala, Sweden
| | - Harry X Wu
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Science, Umeå, Sweden
| | - Yousry A El-Kassaby
- Department of Forest and Conservation Sciences, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Deqiang Zhang
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, College of Biological Sciences and Technology, Beijing Forestry University, No. 35, Qinghua East Road, Beijing 100083, PR China; School of Landscape Architecture, Beijing University of Agriculture, Beijing 102206, PR China.
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14
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Santoro DF, Sicilia A, Testa G, Cosentino SL, Lo Piero AR. Global leaf and root transcriptome in response to cadmium reveals tolerance mechanisms in Arundo donax L. BMC Genomics 2022; 23:427. [PMID: 35672691 PMCID: PMC9175368 DOI: 10.1186/s12864-022-08605-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 05/05/2022] [Indexed: 12/04/2022] Open
Abstract
The expected increase of sustainable energy demand has shifted the attention towards bioenergy crops. Due to their know tolerance against abiotic stress and relatively low nutritional requirements, they have been proposed as election crops to be cultivated in marginal lands without disturbing the part of lands employed for agricultural purposes. Arundo donax L. is a promising bioenergy crop whose behaviour under water and salt stress has been recently studied at transcriptomic levels. As the anthropogenic activities produced in the last years a worrying increase of cadmium contamination worldwide, the aim of our work was to decipher the global transcriptomic response of A. donax leaf and root in the perspective of its cultivation in contaminated soil. In our study, RNA-seq libraries yielded a total of 416 million clean reads and 10.4 Gb per sample. De novo assembly of clean reads resulted in 378,521 transcripts and 126,668 unigenes with N50 length of 1812 bp and 1555 bp, respectively. Differential gene expression analysis revealed 5,303 deregulated transcripts (3,206 up- and 2,097 down regulated) specifically observed in the Cd-treated roots compared to Cd-treated leaves. Among them, we identified genes related to “Protein biosynthesis”, “Phytohormone action”, “Nutrient uptake”, “Cell wall organisation”, “Polyamine metabolism”, “Reactive oxygen species metabolism” and “Ion membrane transport”. Globally, our results indicate that ethylene biosynthesis and the downstream signal cascade are strongly induced by cadmium stress. In accordance to ethylene role in the interaction with the ROS generation and scavenging machinery, the transcription of several genes (NADPH oxidase 1, superoxide dismutase, ascorbate peroxidase, different glutathione S-transferases and catalase) devoted to cope the oxidative stress is strongly activated. Several small signal peptides belonging to ROTUNDIFOLIA, CLAVATA3, and C-TERMINALLY ENCODED PEPTIDE 1 (CEP) are also among the up-regulated genes in Cd-treated roots functioning as messenger molecules from root to shoot in order to communicate the stressful status to the upper part of the plants. Finally, the main finding of our work is that genes involved in cell wall remodelling and lignification are decisively up-regulated in giant reed roots. This probably represents a mechanism to avoid cadmium uptake which strongly supports the possibility to cultivate giant cane in contaminated soils in the perspective to reserve agricultural soil for food and feed crops.
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Affiliation(s)
- Danilo Fabrizio Santoro
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy
| | - Angelo Sicilia
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy
| | - Giorgio Testa
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy
| | - Salvatore Luciano Cosentino
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy
| | - Angela Roberta Lo Piero
- Department of Agriculture, Food and Environment, University of Catania, Via Santa Sofia 98, 95123, Catania, Italy.
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15
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Abeywardhana DC, Adikaram NM, Kularatne RKA. Are mangrove forests reliable sinks of heavy metals due to phytoremediation and other mechanisms? A Sri Lankan perspective. MARINE POLLUTION BULLETIN 2022; 177:113453. [PMID: 35278907 DOI: 10.1016/j.marpolbul.2022.113453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
We present a viewpoint regarding the prospects in Sri Lanka (a tropical island nation) to depend on mangroves in the remediation of heavy metal laden coastal environments. Sri Lanka has a rich array of lagoons and estuaries (total extent of 1580.17 km2) with ideal brackish water habitats to allow mangrove proliferation and for more restoration works. Furthermore, our estimates of Total Potential Ecological Risk (PER < 150) indicate that ecological risk from metallic contamination of coastal sediments is low, which means mangrove ecosystems would be ideal natural treatment systems for such low polluting environments (but as final cum tertiary treatment systems only). Mangroves are neither metal hyperaccumulators nor good phytoremediators (no ability to take up more than 5000 mg/kg dry weight of a given metal or exhibit a bioconcentration factor ≥ 1000), which means not very effective for high polluting environments.
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Affiliation(s)
| | - Nayana Madurya Adikaram
- Department of Physical Sciences, Faculty of Applied Sciences, South Eastern University, Sri Lanka
| | - Ranil Kavindra Asela Kularatne
- Department of Ecology, Environment and Evolution, La Trobe University, Bundoora Campus, Australia; Faculty of Graduate Studies, University of Colombo, Sri Lanka.
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16
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Tao Q, Li M, Xu Q, Kováč J, Yuan S, Li B, Li Q, Huang R, Gao X, Wang C. Radial transport difference mediated by root endodermal barriers contributes to differential cadmium accumulation between japonica and indica subspecies of rice (Oryza sativa L.). JOURNAL OF HAZARDOUS MATERIALS 2022; 425:128008. [PMID: 34986570 DOI: 10.1016/j.jhazmat.2021.128008] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 11/22/2021] [Accepted: 12/05/2021] [Indexed: 06/14/2023]
Abstract
Although Cd concentration of grains is generally lower in japonica than in indica subspecies, the effects of root endodermal barriers on the subspecific differences in Cd accumulation in rice (Oryza sativa L.) are poorly understood. Here, we characterized the differences in endodermal differentiation between japonica and indica subspecies and their effects on Cd radial transport. Casparian strips (CSs) and suberin lamellae (SL) in japonica subspecies were initiated at the 6%- 7% and 21%- 27% position from the root tip, respectively, which were 65% and 26% earlier than in indica subspecies, respectively. The lignin/suberin content in japonica subspecies was 47%/42% greater than that in indica subspecies because of the higher expression of lignin/suberin biosynthesis-related genes (OsCASP1, OsPAL, OsCYP86A1 and OsKCS20). Cd exposure induced endodermal plasticity in both subspecies, but the changes in japonica were greater than in indica subspecies. The earlier formation of CSs/SL in japonica subspecies significantly restricted the flow of radial transport tracer to reach the xylem and decreased Cd influx into roots, that is, endodermal barriers inhibited Cd radial transport via both apoplastic and cell-to-cell pathways, thus decreasing the root-to-shoot transport of Cd in japonica subspecies. Our findings are beneficial for the genetic modification of rice with low-Cd-accumulating ability.
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Affiliation(s)
- Qi Tao
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China.
| | - Meng Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Qiang Xu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Ján Kováč
- Department of Phytology, Faculty of Forestry, Technical University in Zvolen, T.G. Masaryka 24, Zvolen, Slovakia; Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina B2, 842 15 Bratislava, Slovakia
| | - Shu Yuan
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Bing Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Qiquan Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Rong Huang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Xuesong Gao
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China
| | - Changquan Wang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, China.
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Nie G, Yang Z, He J, Liu A, Chen J, Wang S, Wang X, Feng G, Li D, Peng Y, Huang L, Zhang X. Genome-Wide Investigation of the NAC Transcription Factor Family in Miscanthus sinensis and Expression Analysis Under Various Abiotic Stress. FRONTIERS IN PLANT SCIENCE 2021; 12:766550. [PMID: 34804100 PMCID: PMC8600139 DOI: 10.3389/fpls.2021.766550] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 10/11/2021] [Indexed: 06/13/2023]
Abstract
The NAC transcription factor family is deemed to be a large plant-specific gene family that plays important roles in plant development and stress response. Miscanthus sinensis is commonly planted in vast marginal land as forage, ornamental grass, or bioenergy crop which demand a relatively high resistance to abiotic stresses. The recent release of a draft chromosome-scale assembly genome of M. sinensis provided a basic platform for the genome-wide investigation of NAC proteins. In this study, a total of 261 M. sinensis NAC genes were identified and a complete overview of the gene family was presented, including gene structure, conserved motif compositions, chromosomal distribution, and gene duplications. Results showed that gene length, molecular weights (MW), and theoretical isoelectric points (pI) of NAC family were varied, while gene structure and motifs were relatively conserved. Chromosomal mapping analysis found that the M. sinensis NAC genes were unevenly distributed on 19 M. sinensis chromosomes, and the interchromosomal evolutionary analysis showed that nine pairs of tandem duplicates genes and 121 segmental duplications were identified, suggesting that gene duplication, especially segmental duplication, is possibly associated with the amplification of M. sinensis NAC gene family. The expression patterns of 14 genes from M. sinensis SNAC subgroup were analyzed under high salinity, PEG, and heavy metals, and multiple NAC genes could be induced by the treatment. These results will provide a very useful reference for follow-up study of the functional characteristics of NAC genes in the mechanism of stress-responsive and potential roles in the development of M. sinensis.
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Robin SL, Marchand C, Ham B, Pattier F, Laporte-Magoni C, Serres A. Influences of species and watersheds inputs on trace metal accumulation in mangrove roots. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 787:147438. [PMID: 34000538 DOI: 10.1016/j.scitotenv.2021.147438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/23/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
Mangrove forest is a key ecosystem between land and sea, and provides many services such as trapping sediments and contaminants. These contaminants include trace metals (TM) that can accumulate in mangroves soil and biota. This paper innovates by the comparative study of the effects of the watershed inputs on TM distribution in mangrove soil, on roots bioconcentration factors of two species (Avicennia marina and Rhizophora stylosa), and on Fe plaque formation and immobilization of these TM. Two mangrove forests in New Caledonia were chosen as study sites. One mangrove is located downstream ultramafic rocks and a Ni mine (ultrabasic site), whereas the second mangrove ends a volcano-sedimentary watershed (non-ultrabasic site). TM concentrations (Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Zn) were measured in soil, porewaters, and roots of both species via ICP-OES or Hg analyzer. Analyzed TM were significantly more concentrated in soils at the ultrabasic site with Fe, Cr, and Ni the most abundant. Iron, Mn, and Ni were the most concentrated in the roots with mean values of 9,651, 192, and 133 mg kg-1 respectively. However, the bioconcentration factors (BCF) of Fe (0.16) and Ni (0.11) were low due to a lack of ions in the dissolved phase and potential uptake regulation. The uptake of TM by mangrove trees was influenced by concentrations in soil, but more importantly by their potential bioavailability and the physiological characteristics of each species. TM concentrations and BCF were lower for R. stylosa probably due to less permeable root system. A. marina limits TM absorption through Fe plaque formation on its pneumatophores with a capacity to retain TM up to 94% for Mn. Mean Fe plaque formation is potentially correlated to Fe concentration in soil. Eventually, framboids of pyrite were observed within root tissues in the epidermis of A. marina's pneumatophores.
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Affiliation(s)
- Sarah Louise Robin
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia.
| | - Cyril Marchand
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
| | - Brian Ham
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
| | - France Pattier
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
| | - Christine Laporte-Magoni
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
| | - Arnaud Serres
- Institut de Sciences Exactes et Appliquées (ISEA EA7484), Université de la Nouvelle-Calédonie, 145 Avenue James Cook, Nouville, BP R4 98851, Nouméa Cedex, New Caledonia
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Comparative transcriptome analysis of the hyperaccumulator plant Phytolacca americana in response to cadmium stress. 3 Biotech 2021; 11:327. [PMID: 34194911 DOI: 10.1007/s13205-021-02865-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 05/31/2021] [Indexed: 12/11/2022] Open
Abstract
To study the molecular mechanism of the hyperaccumulator plant Phytolacca americana against cadmium (Cd) stress, the leaves of P. americana treated with 400 μM Cd for 0, 2, 12, and 24 h were harvested for comparative transcriptome analysis. In total, 110.07 Gb of clean data were obtained, and 63,957 unigenes were acquired after being assembled. Due to the lack of P. americana genome information, only 24,517 unigenes were annotated by public databases. After Cd treatment, 5054 differentially expressed genes (DEGs) were identified. KEGG pathway enrichment analysis of DEGs showed that genes involved in the flavonoid biosynthesis and antenna proteins of photosynthesis were significantly down-regulated, while genes related to the lignin biosynthesis pathway were remarkably up-regulated, indicating that P. americana could synthesize more lignin to cope with Cd stress. Moreover, genes related to heavy metal accumulation, sulfur metabolism and glutathione metabolism were also significantly up-regulated. The gene expression pattern of several key genes related to distinct metabolic pathways was verified by qRT-PCR. The results indicated that the immobilization of lignin in cell wall, chelation, vacuolar compartmentalization, as well as the increase of thiol compounds content may be the important mechanisms of Cd detoxification in hyperaccumulator plant P. americana. Accession numbers: the raw data of P. americana transcriptome presented in this study are openly available in NCBI SRA database, under the BioProject of PRJNA649785. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-021-02865-x.
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20
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Pan C, Lu H, Yang C, Wang L, Chen J, Yan C. Comparative transcriptome analysis reveals different functions of Kandelia obovata superoxide dismutases in regulation of cadmium translocation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 771:144922. [PMID: 33736147 DOI: 10.1016/j.scitotenv.2020.144922] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 12/28/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
Kandelia obovata is a dominant mangrove species in southeastern of China. This species has a high tolerance to heavy metal stress that is mainly ascribed to the thickening of the secondary exodermis and high activity of superoxide dismutase (SOD) enzymes in the roots. The thickened exodermis inhibits entry of heavy metals into the roots, and oxidative stress due to Cd can be reduced efficiently by SOD activity. Although there are several proposed mechanisms by which genes encoding SODs in K. obovata (KoSODs) could induce lignification that contributes to thickening of the root exodermis, the exact functions of FeSOD2 (KoFSD2) and Cu/ZnSOD3 (KoCSD3) remain unclear. In this study we investigated the role of a thickened exodermis in K. obovata root tissues in response to Cd treatment, and determined functions of KoFSD2 and KoCSD3 by performing comparative transcriptome analysis on tobacco lines that overexpress these two enzymes. we found that a thickened exodermis can reduce Cd uptake, and that exposure to high concentrations Cd can promote secondary thickening processes in K. obovata roots exodermis. Transgenic Nicotiana benthamiana overexpressing of KoFSD2 or KoCSD3 exhibit different responses to Cd stress. KoCSD3 can promote thickening of the secondary cell wall of root vascular tissues to impede Cd entry. Meanwhile, KoFSD2 and KoCSD3 can also regulate translocation of copper and iron in response to Cd accumulation. Taken together, our results expand our understanding of the physiological roles of SODs in K. obovata against Cd stress.
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Affiliation(s)
- Chenglang Pan
- Institute of Oceanography, Minjiang University, Fuzhou, Fujian, PR China.
| | - Haoliang Lu
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen 361102, PR China
| | - Chuanyu Yang
- Texas A&M university-Kingsville citrus center, Weslaco, USA
| | - Lu Wang
- Institute of Oceanography, Minjiang University, Fuzhou, Fujian, PR China
| | - Jianming Chen
- Institute of Oceanography, Minjiang University, Fuzhou, Fujian, PR China.
| | - Chongling Yan
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment and Ecology, Xiamen University, Xiamen 361102, PR China.
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21
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Miao J, Feng Q, Li Y, Zhao Q, Zhou C, Lu H, Fan D, Yan J, Lu Y, Tian Q, Li W, Weng Q, Zhang L, Zhao Y, Huang T, Li L, Huang X, Sang T, Han B. Chromosome-scale assembly and analysis of biomass crop Miscanthus lutarioriparius genome. Nat Commun 2021; 12:2458. [PMID: 33911077 PMCID: PMC8080599 DOI: 10.1038/s41467-021-22738-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 03/12/2021] [Indexed: 11/09/2022] Open
Abstract
Miscanthus, a rhizomatous perennial plant, has great potential for bioenergy production for its high biomass and stress tolerance. We report a chromosome-scale assembly of Miscanthus lutarioriparius genome by combining Oxford Nanopore sequencing and Hi-C technologies. The 2.07-Gb assembly covers 96.64% of the genome, with contig N50 of 1.71 Mb. The centromere and telomere sequences are assembled for all 19 chromosomes and chromosome 10, respectively. Allotetraploid origin of the M. lutarioriparius is confirmed using centromeric satellite repeats. The tetraploid genome structure and several chromosomal rearrangements relative to sorghum are clearly demonstrated. Tandem duplicate genes of M. lutarioriparius are functional enriched not only in terms related to stress response, but cell wall biosynthesis. Gene families related to disease resistance, cell wall biosynthesis and metal ion transport are greatly expanded and evolved. The expansion of these families may be an important genomic basis for the enhancement of remarkable traits of M. lutarioriparius.
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Affiliation(s)
- Jiashun Miao
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qi Feng
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Yan Li
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Qiang Zhao
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Congcong Zhou
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Hengyun Lu
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Danlin Fan
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Juan Yan
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, China
| | - Yiqi Lu
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Qilin Tian
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Wenjun Li
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Qijun Weng
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Lei Zhang
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Yan Zhao
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Tao Huang
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Laigeng Li
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China
| | - Xuehui Huang
- College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Tao Sang
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
| | - Bin Han
- National Center for Gene Research, State Key Laboratory of Plant Molecular Genetics, CAS Center of Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200233, China.
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22
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Fan W, Liu C, Cao B, Ma S, Hu J, Xiang Z, Zhao A. A meta-analysis of transcriptomic profiles reveals molecular pathways response to cadmium stress of Gramineae. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 209:111816. [PMID: 33360213 DOI: 10.1016/j.ecoenv.2020.111816] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 12/04/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
As a non-essential heavy metal, cadmium (Cd) is toxic to plants. In the last 15 years, over 70 transcriptome studies have been published to decipher the molecular response mechanism against Cd stress in different plants. To extract generalization results from transcriptomic data across different plants and obtain some hub genes that respond to Cd stress, we carried out a meta-analysis of 32 published datasets. Cluster analysis revealed that plant species played a more decisive role than the media used and exposure time in the transcriptome patterns of plant roots response to Cd. The datasets from a Gramineae-like (GL) group were closer in clustering. 838 DEGs were commonly Cd-regulated in at least nine of 18 GL datasets. Gene ontology and KEGG pathway analyses revealed that oxidative stress-related terms and lignin synthesis-related terms were significantly enriched. Mapman analysis revealed that these common DEGs were mainly involved in regulation, cellular response, secondary metabolism, transport, cell wall and lipid metabolism. In Oryza sativa, 15 DEGs were up-regulated in at least four of five HM (As, Cr, Cd, Hg and Pb) groups, such as Os10g0517500 (methionine gamma-lyase) and Os01g0159800 (bHLH107). Moreover, our datasets can be used to retrieve log2FC value of specific genes across 29 studies (48 datasets), which provides data reference for the subsequent selection of HM-related genes. Our results provide the basis for further understanding of Cd tolerance mechanisms in plants.
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Affiliation(s)
- Wei Fan
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, Southwest University, Chongqing, PR China
| | - ChangYing Liu
- Key Laboratory of Coarse Cereal Processing, Ministry of Agriculture and Rural Affairs, Chengdu University, Chengdu, PR China
| | - Boning Cao
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, Southwest University, Chongqing, PR China
| | - Shuyu Ma
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, Southwest University, Chongqing, PR China
| | - Jie Hu
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, Southwest University, Chongqing, PR China
| | - Zhonghuai Xiang
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, Southwest University, Chongqing, PR China
| | - Aichun Zhao
- State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, Southwest University, Chongqing, PR China.
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23
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Zhou C, Ma Q, Li S, Zhu M, Xia Z, Yu W. Toxicological effects of single and joint sulfamethazine and cadmium stress in soil on pakchoi (Brassica chinensis L.). CHEMOSPHERE 2021; 263:128296. [PMID: 33297238 DOI: 10.1016/j.chemosphere.2020.128296] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/05/2020] [Accepted: 09/07/2020] [Indexed: 06/12/2023]
Abstract
The combined pollution of heavy metals and antibiotics in soil has attracted increasing attention due to their negative effects on plant growth. The aims of this study were to evaluate the phytotoxicity of single and combined sulfamethazine (SMT) and cadmium (Cd), selected as target pollutants in soil, on growth and physiological response of pakchoi (Brassica chinensis L.). Results revealed that the soil spiked with 10 mg kg-1 Cd inhibited the pakchoi growth regardless of SMT addition. The combined effect of SMT and Cd stress on uptake of SMT or Cd by pakchoi were concerned with their combined concentration. The combined influence of high concentrations SMT and Cd (1 and 10 mg kg-1) exposure on the Cd content of pakchoi showed antagonistic effects and synergistic effects, respectively. Besides, oxidative substances and enzyme activity of pakchoi tissue were affected by Cd and SMT exposure in the soil, particularly by their joint stress. This mainly expressed as the increase of malondialdehyde (MDA), H2O2 content and antioxidant enzyme activity (superoxide dismutase (SOD), peroxidase (POD), catalase (CAT)), which could be ascribed to the induction of Cd and SMT stress. Additionally, the SMT-Cd combined stress caused more reduction in nutrients (vitamin C and sugar) of pakchoi than the correspondingly single Cd stress. In conclusion, the SMT and Cd in soil lead to their accumulation and oxidative damage in pakchoi, which disturb the antioxidant defense system and ultimately adversely affect growth and quality of pakchoi.
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Affiliation(s)
- Changrui Zhou
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qiang Ma
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Shuailin Li
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Mengmeng Zhu
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhuqing Xia
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wantai Yu
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.
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24
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Cheng H, Liu Y, Jiang ZY, Wang YS. Radial oxygen loss is correlated with nitrogen nutrition in mangroves. TREE PHYSIOLOGY 2020; 40:1548-1560. [PMID: 32705132 DOI: 10.1093/treephys/tpaa089] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 10/12/2019] [Accepted: 07/06/2020] [Indexed: 06/11/2023]
Abstract
The present study aimed to explore the possible functions of radial oxygen loss (ROL) on mangrove nutrition. A field survey was conducted to explore the relations among ROL, root anatomy and leaf N in different mangrove species along a continuous tidal gradient. Three mangroves with different ROL (Avicennia marina [A. marina], Kandelia obovata and Rhizophora stylosa) were then selected to further explore the dynamics of N at the root-soil interface. The results showed that seaward pioneer mangrove species such as A. marina appeared to exhibit higher leaf N despite growing under poorer nutrient conditions. Greater leaf N in pioneer mangroves coincided with their special root structure (e.g., high porosity together with a thin lignified/suberized exodermis) and powerful ROL. An interesting positive relation was observed between ROL and leaf N in mangroves. Moreover, rhizo-box data further showed that soil nitrification was also strongly correlated with ROL. A. marina, which had the highest ROL among the three mangrove species studied, consistently possessed the highest levels of NO3-, nitrification and ammonia-oxidizing bacteria and archaea gene copies in the rhizosphere. Besides, both NO3- and NH4+ influxes were found to be higher in the roots of A. marina when compared to those of K. obovata and R. stylosa. In summary, greater N acquisition by pioneer mangroves such as A. marina was strongly correlated with ROL which would regulate N transformation and translocation at the root-soil interface. The implications of this study may be significant in mangrove nutrition and the mechanisms involved in mangrove zonation.
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Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography and Daya Bay Marina Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164th Xingang West Road, Guangzhou 510301, China
| | - Yong Liu
- Ministry of Agriculture Key Laboratory of Mariculture Ecology and Products Quality and Safety, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 231th Xingang West Road, Guangzhou 510300, China
| | - Zhao-Yu Jiang
- State Key Laboratory of Tropical Oceanography and Daya Bay Marina Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164th Xingang West Road, Guangzhou 510301, China
- College of Life Sciences, Linyi University, middle-region of Shuangling Road, Linyi 276000, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography and Daya Bay Marina Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164th Xingang West Road, Guangzhou 510301, China
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25
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Qi X, Tam NFY, Li WC, Ye Z. The role of root apoplastic barriers in cadmium translocation and accumulation in cultivars of rice (Oryza sativa L.) with different Cd-accumulating characteristics. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 264:114736. [PMID: 32417578 DOI: 10.1016/j.envpol.2020.114736] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 04/20/2020] [Accepted: 05/03/2020] [Indexed: 05/25/2023]
Abstract
The radial translocation of cadmium (Cd) from the root to the shoot is one of the major processes affecting Cd accumulation in rice (Oryza sativa L.) grains, but few studies have focused on Cd apoplastic transport in rice. The aim of this study was to determine how apoplastic barriers affect Cd translocation via the apoplastic pathway, Cd accumulation levels in upper parts (shoot and grains) of rice cultivars, and the possible mechanism involved. Hydroponic and soil pot trials were conducted to study the development and chemical constituents of apoplastic barriers and their permeability to bypass flow, and to determine Cd localization in the roots of rice cultivars with different Cd-accumulating characteristics. The Cd accumulation in upper parts was positively correlated with bypass flow in the root and the apparent Cd concentration in the xylem, indicating that the apoplastic pathway may play an important role in Cd root-shoot translocation in rice. Apoplastic barriers were deposited closer to the root tip and were thicker in low Cd-accumulating cultivars than in high Cd-accumulating cultivars. The amounts and rates of increase in lignin and suberin were significantly higher in ZD14 (a low Cd-accumulating cultivar) than in FYXZ (a high Cd-accumulating cultivar) under Cd stress, indicating that stronger barriers were induced by Cd in ZD14. The stronger and earlier formation of barriers in the low Cd-accumulating cultivar decreased bypass flow more efficiently, so that more Cd was retained in the root during apoplastic translocation. This was confirmed by localization analyses of Cd in root transverse sections. These results suggest that apoplastic barriers reduce Cd root-to-shoot translocation via the apoplastic pathway, leading to lower Cd accumulation in the upper parts of rice plants. Bypass flow may have the potential to be used as a rapid screening indicator for low Cd-accumulating rice cultivars.
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Affiliation(s)
- Xiaoli Qi
- School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Nora Fung-Yee Tam
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Wai Chin Li
- Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China
| | - Zhihong Ye
- School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, China.
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Molnár Á, Rónavári A, Bélteky P, Szőllősi R, Valyon E, Oláh D, Rázga Z, Ördög A, Kónya Z, Kolbert Z. ZnO nanoparticles induce cell wall remodeling and modify ROS/ RNS signalling in roots of Brassica seedlings. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 206:111158. [PMID: 32866892 DOI: 10.1016/j.ecoenv.2020.111158] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 08/06/2020] [Accepted: 08/08/2020] [Indexed: 01/19/2023]
Abstract
Cell wall-associated defence against zinc oxide nanoparticles (ZnO NPs) as well as nitro-oxidative signalling and its consequences in plants are poorly examined. Therefore, this study compares the effect of chemically synthetized ZnO NPs (~45 nm, 25 or 100 mg/L) on Brassica napus and Brassica juncea seedlings. The effects on root biomass and viability suggest that B. napus is more tolerant to ZnO NP exposure relative to B. juncea. This may be due to the lack of Zn ion accumulation in the roots, which is related to the increase in the amount of lignin, suberin, pectin and in peroxidase activity in the roots of B. napus. TEM results indicate that root cell walls of 25 mg/L ZnO NP-treated B. napus may bind Zn ions. Additionally, callose accumulation possibly contribute to root shortening in both Brassica species as the effect of 100 mg/L ZnO NPs. Further results suggest that in the roots of the relatively sensitive B. juncea the levels of superoxide radical, hydrogen peroxide, hydrogen sulfide, nitric oxide, peroxinitrite and S-nitrosoglutathione increased as the effect of high ZnO NP concentration meaning that ZnO NP intensifies nitro-oxidative signalling. In B. napus; however, reactive oxygen species signalling was intensified, but reactive nitrogen species signalling wasn't activated by ZnO NPs. Collectively, these results indicate that ZnO NPs induce cell wall remodeling which may be associated with ZnO NP tolerance. Furthermore, plant tolerance against ZnO NPs is associated rather with nitrosative signalling than oxidative modifications.
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Affiliation(s)
- Árpád Molnár
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, H-6726, Szeged, Közép fasor 52., Hungary.
| | - Andrea Rónavári
- Department of Applied and Environmental Chemistry, Faculty of Science and Informatics, University of Szeged, H-6720, Szeged, Rerrich Bela ter 1., Hungary.
| | - Péter Bélteky
- Department of Applied and Environmental Chemistry, Faculty of Science and Informatics, University of Szeged, H-6720, Szeged, Rerrich Bela ter 1., Hungary.
| | - Réka Szőllősi
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, H-6726, Szeged, Közép fasor 52., Hungary.
| | - Emil Valyon
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, H-6726, Szeged, Közép fasor 52., Hungary.
| | - Dóra Oláh
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, H-6726, Szeged, Közép fasor 52., Hungary.
| | - Zsolt Rázga
- Department of Pathology, Faculty of Medicine, University of Szeged, H-6725, Szeged, Állomás u. 2., Hungary.
| | - Attila Ördög
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, H-6726, Szeged, Közép fasor 52., Hungary.
| | - Zoltán Kónya
- Department of Applied and Environmental Chemistry, Faculty of Science and Informatics, University of Szeged, H-6720, Szeged, Rerrich Bela ter 1., Hungary.
| | - Zsuzsanna Kolbert
- Department of Plant Biology, Faculty of Science and Informatics, University of Szeged, H-6726, Szeged, Közép fasor 52., Hungary.
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Cheng H, Inyang A, Li CD, Fei J, Zhou YW, Wang YS. Salt tolerance and exclusion in the mangrove plant Avicennia marina in relation to root apoplastic barriers. ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:676-683. [PMID: 32291617 DOI: 10.1007/s10646-020-02203-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/23/2020] [Indexed: 06/11/2023]
Abstract
Salt tolerance and the possible functions of suberization on salt exclusion and secretion were examined in a dominant mangrove plant, Avicennia marina. The results showed that low salinities (10‰ and 20‰) almost has no negative effect on A. marina, however significant growth inhibitions were observed in the seedlings grown in higher salinities (30‰ and 40‰). With the increases of salinity, increased tissue Na+ content and enhanced salt secretion by glands were observed. Obvious suberization thickening were detected both in the exodermis and endodermis of the roots after salt pretreatment when compared to the roots without salt treatment. More importantly, the present data further confirmed that these root apoplastic barriers would directly decrease Na+ loading into xylem. Higher salt tolerance was observed in the seedlings pre-cultivated by salty tide when compared to fresh water cultivated A. marina. In summary, this study suggests a barrier property of suberization in dealing with salt exclusion in mangroves, a moderate salt pre-treatment may benefit plant withstanding high salinity.
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Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
| | - Anifiok Inyang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Chang-Da Li
- Marine and fisheries Development Research Center, Dongtou District, Wenzhou, 325009, China
| | - Jiao Fei
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
| | - Yan-Wu Zhou
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China.
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China.
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Cheng H, Wang YS, Li CD, Ye ZH, Muhammad S, Wu ML, Sun FL. Mixture of Pb, Zn and Cu on root permeability and radial oxygen loss in the mangrove Bruguiera gymnorrhiza. ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:691-697. [PMID: 32472470 DOI: 10.1007/s10646-020-02234-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/13/2020] [Indexed: 06/11/2023]
Abstract
A short term pot trail was employed to evaluate the exposure of mixed heavy metals (Cu, Pb and Zn) on growth, radial oxygen loss (ROL) and root anatomy in Bruguiera gymnorrhiza. The possible function of BgC4H, a cytochrome P450 gene, on root lignification was also discussed. The exposures of mixed Cu, Pb and Zn directly reduce O2 leakage at root surface. The reduced ROL inhibited by heavy metals was mainly ascribed by the changes in root anatomical features, such as decreased root porosity together with increased lignification within the exodermis. BgC4H was found to be up-regulated after 0.5-day metal exposure, and remained higher transcript levels within 3-day metal exposure when compared to control roots. Besides, the inhibited photosynthesis may also result in less oxygen can be transported to the underground roots. In summary, the mangrove B. gymnorrhiza appeared to react to external mixed metal contaminants by developing a lignified and impermeable exodermis, and such a root barrier induced by mixed Cu, Pb and Zn appeared to be an adaptive response to block metal ions enters into the roots.
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Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China.
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China.
| | - Chang-Da Li
- Marine and fisheries Development Research Center, Dongtou District, Wenzhou, 325009, China
| | - Zhi-Hong Ye
- State Key Laboratory for Bio-control, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Shafi Muhammad
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Mei-Lin Wu
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Fun-Lin Sun
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China
- Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China
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Bourgeois C, Alfaro AC, Bisson E, Alcius S, Marchand C. Trace metal dynamics in soils and plants along intertidal gradients in semi-arid mangroves (New Caledonia). MARINE POLLUTION BULLETIN 2020; 156:111274. [PMID: 32510413 DOI: 10.1016/j.marpolbul.2020.111274] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/05/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
Trace metal dynamics were investigated in mangroves developing in semi-arid New Caledonia, where Avicennia and Rhizophora stands grow in the upper and lower intertidal zone, respectively. We collected soil samples and mangrove tissues in an undisturbed site, a mining-influenced site and in a mining and aquaculture-influenced site. Differences in duration of immersion and organic matter (OM) cycling resulted in a sharp decrease of metal concentrations in soils and plants from landside to seaside. Both species were tolerant to metals mainly via exclusion, (i.e. metal bioaccumulation restricted to roots and leaf litter). Strong correlations (p < 0.05) were found between Na and Fe, Mn, Cu and Zn in green and senesced leaves of Avicennia marina, indicating a possible role of those metals in mechanisms to cope with hypersaline conditions. Increasing metal pollution, aridity and sea-level rise are likely to result in a decrease in mangrove efficiency in filtering trace metals seaward.
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Affiliation(s)
- Carine Bourgeois
- Auckland University of Technology (AUT): Institute for Applied Ecology New Zealand, School of Science, Faculty of Health and Environmental Sciences, Private Bag 92006, Auckland 1142, New Zealand; IMPMC, Institut de Recherche pour le Développement (IRD), UPMC, CNRS, MNHN, Noumea, New Caledonia, France
| | - Andrea C Alfaro
- Auckland University of Technology (AUT): Institute for Applied Ecology New Zealand, School of Science, Faculty of Health and Environmental Sciences, Private Bag 92006, Auckland 1142, New Zealand.
| | - Estelle Bisson
- IMPMC, Institut de Recherche pour le Développement (IRD), UPMC, CNRS, MNHN, Noumea, New Caledonia, France
| | - Steevensen Alcius
- IMPMC, Institut de Recherche pour le Développement (IRD), UPMC, CNRS, MNHN, Noumea, New Caledonia, France
| | - Cyril Marchand
- IMPMC, Institut de Recherche pour le Développement (IRD), UPMC, CNRS, MNHN, Noumea, New Caledonia, France; ISEA, University of New Caledonia BP R4, 98851 Noumea, New Caledonia
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30
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De Caroli M, Furini A, DalCorso G, Rojas M, Di Sansebastiano GP. Endomembrane Reorganization Induced by Heavy Metals. PLANTS (BASEL, SWITZERLAND) 2020; 9:E482. [PMID: 32283794 PMCID: PMC7238196 DOI: 10.3390/plants9040482] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/04/2020] [Accepted: 04/07/2020] [Indexed: 12/18/2022]
Abstract
Plant cells maintain plasmatic concentrations of essential heavy metal ions, such as iron, zinc, and copper, within the optimal functional range. To do so, several molecular mechanisms have to be committed to maintain concentrations of non-essential heavy metals and metalloids, such as cadmium, mercury and arsenic below their toxicity threshold levels. Compartmentalization is central to heavy metals homeostasis and secretory compartments, finely interconnected by traffic mechanisms, are determinant. Endomembrane reorganization can have unexpected effects on heavy metals tolerance altering in a complex way membrane permeability, storage, and detoxification ability beyond gene's expression regulation. The full understanding of endomembrane role is propaedeutic to the comprehension of translocation and hyper-accumulation mechanisms and their applicative employment. It is evident that further studies on dynamic localization of these and many more proteins may significantly contribute to the understanding of heavy metals tolerance mechanisms. The aim of this review is to provide an overview about the endomembrane alterations involved in heavy metals compartmentalization and tolerance in plants.
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Affiliation(s)
- Monica De Caroli
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy; (M.D.C.); (M.R.)
| | - Antonella Furini
- Department of Biotechnology, University of Verona, 37134 Verona, Italy; (A.F.); (G.D.)
| | - Giovanni DalCorso
- Department of Biotechnology, University of Verona, 37134 Verona, Italy; (A.F.); (G.D.)
| | - Makarena Rojas
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy; (M.D.C.); (M.R.)
| | - Gian-Pietro Di Sansebastiano
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy; (M.D.C.); (M.R.)
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31
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Agnihotri A, Seth CS. Does jasmonic acid regulate photosynthesis, clastogenecity, and phytochelatins in Brassica juncea L. in response to Pb-subcellular distribution? CHEMOSPHERE 2020; 243:125361. [PMID: 31760287 DOI: 10.1016/j.chemosphere.2019.125361] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 11/11/2019] [Accepted: 11/12/2019] [Indexed: 06/10/2023]
Abstract
The present experiment unravels how exogenous jasmonic acid regulates photosynthesis, clastogenecity, AsA-GSH cycle and phytochelatins in Brassica juncea L. in response to Pb-subcellular distribution. The plants were evaluated for leaf gas exchange parameters, Fv/Fm, lipid peroxidation, leaf epidermal structures and ABA content. Besides lead accumulation in root, shoot and its subcellular distribution pattern, its role as clastogen and/or aneuploidogen via DNA damage, genome size and ploidy variations, AsA-GSH cycle and quantification of PC2 and PC3 were performed as well. Results revealed that Pb inhibited plant growth, disturbed epidermal and guard cells and consequently worsen leaf gas exchange parameters (E, GH2O, A), Fv/Fm and photosynthetic pigments. For clastogenecity, results revealed considerable DNA damage and analysis for genome size showed that differences between unstressed, Pb-stress and JA application were not significant (P ≤ 0.05), however, ploidy ratio analysis proved partial aneuploidogenic role of Pb. The highest Pb exposure affected AsA-GSH cycle negatively but increased PC2 and PC3 contents uniformly in roots and leaves. Surprisingly, exogenous JA inhibits plant growth under non-stress but positively regulates growth, photosynthesis, AsA-GSH cycle, PC2 and PC3 contents and DNA damage but has no significant effect on variations in total genome size and ploidy under Pb-stress.
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Pan C, Lu H, Liu J, Yu J, Wang Q, Li J, Yang J, Hong H, Yan C. SODs involved in the hormone mediated regulation of H 2O 2 content in Kandelia obovata root tissues under cadmium stress. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 256:113272. [PMID: 31672353 DOI: 10.1016/j.envpol.2019.113272] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 08/29/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Cadmium (Cd) pollution in mangrove wetlands has received increasing attention as urbanization expands rapidly. As a dominant mangrove species, Kandelia obovata is highly tolerant to Cd toxicity. Plant hormones and superoxide dismutase (SODs) play critical roles in the response to heavy metal stress in K. obovata roots. Although theirs important influence have been reported, the regulation mechanism between SODs and plant hormones in Cd detoxification by K. obovata roots remains limited. Here, we investigated relationships among SOD, plant hormones, and Cd tolerance in K. obovata roots exposed to Cd. We found that Cd was retained in the epidermis and exodermis of roots, and the epidermis and exodermis had highest hydrogen peroxide (H2O2) content and SOD activity. Similarly, SOD isozymes also exhibited distinct activity in the different parts of root. Overexpressed KoCSD3 and KoFSD2 individually in Nicotiana benthamiana revealed that different SOD members contributed to H2O2 content regulation by promote the activity of downstream antioxidant enzymes under Cd treatment. In addition, assays on the effects of hormones showed that increased endogenous indole-3-acetic acid (IAA) was observed in the cortex and stele, whereas the abscisic acid (ABA) content was enhanced in the epidermis and exodermis in roots during Cd treatment. The results of exogenous hormones treatment indicated that KoFSD2 upregulated under ABA and IAA treatment, but KoCSD3 only induced by ABA stimulation. Taken together, our results reveal the relationship between SODs and plant hormones, which expands the knowledge base regarding KoSODs response to plant hormones and mediating H2O2 concentration under Cd stress.
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Affiliation(s)
- Chenglang Pan
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, PR China
| | - Haoliang Lu
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, PR China.
| | - Jingchun Liu
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, PR China
| | - Junyi Yu
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, PR China
| | - Qiang Wang
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, PR China
| | - Junwei Li
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, PR China
| | - Jinjin Yang
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, PR China
| | - Hualong Hong
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, PR China
| | - Chongling Yan
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen, 361102, PR China; State Key Laboratory of Marine Environmental Science, XiamenUniversity, Xiamen, 361102, PR China.
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Effects of Salt on Root Aeration, Nitrification, and Nitrogen Uptake in Mangroves. FORESTS 2019. [DOI: 10.3390/f10121131] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The potential effects of salt on the growth, root anatomy, radial oxygen loss (ROL), and nitrogen (N) dynamics in mangroves were investigated using the seedlings of Avicennia marina (Forsk.) Vierh. The results showed that a moderate salinity (200 mM NaCl) appeared to have little negative effect on the growth of A. marina. However, higher salt stresses (400 and 600 mM NaCl) significantly inhibited the biomass yield. Concentrations of N in the roots and leaves decreased sharply with increasing salinity. Nevertheless, the presence of salt directly altered root anatomy (e.g., reduced root porosity and promoted suberization within the exodermis and endodermis), leading to a significant reduction in ROL. The results further showed that reduced ROL induced by salt could restrain soil nitrification, resulting in less ammonia-oxidizing archaea and bacteria (AOA and AOB) gene copies and lower concentrations of NO3− in the soils. While increased root suberization induced by salt inhibited NH4+ and NO3− uptake and influx into the roots. In summary, this study indicated that inhibited root aeration may be a defense response to salt, however these root symptoms were not advantageous for rhizosphere nitrification and N uptake by A. marina.
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Li J, Yu J, Du D, Liu J, Lu H, Yan C. Analysis of anatomical changes and cadmium distribution in Aegiceras corniculatum (L.) Blanco roots under cadmium stress. MARINE POLLUTION BULLETIN 2019; 149:110536. [PMID: 31543481 DOI: 10.1016/j.marpolbul.2019.110536] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 08/20/2019] [Accepted: 08/20/2019] [Indexed: 05/08/2023]
Abstract
Heavy metal stress changes the morphological and anatomical structure of plant organs. In this study, we determined the anatomical changes and Cd distribution in the roots of Aegiceras corniculatum (L.) Blanco (Black mangrove) under Cd stress. The results showed that Cd levels in A. corniculatum root tissues decreased in the following order: endodermis > pith > xylem > epidermis and exodermis > phloem > cortex. The endodermis secondary casparian strip replaces exodermis casparian strip and plays a role in the "retardation mechanism", which sort of compensates for the missing exodermis retardation effect. The xylem and pith both show high affinity for Cd and contain enriched Cd. This creates a low-Cd environment for phloem and protects the nutrient transport function of the vasculature against Cd toxicity. The present study provides new evidences suggesting that Cd regional enrichment and anatomical structure changes are an adaptive strategy of mangrove plants to HM tolerance.
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Affiliation(s)
- Jian Li
- Institute of Environment and Ecology, Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Junyi Yu
- State Key Lab of Marine Environmental Science, Xiamen University, Xiamen 361102, China
| | - Daolin Du
- Institute of Environment and Ecology, Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Jingchun Liu
- State Key Lab of Marine Environmental Science, Xiamen University, Xiamen 361102, China
| | - Haoliang Lu
- State Key Lab of Marine Environmental Science, Xiamen University, Xiamen 361102, China
| | - Chongling Yan
- State Key Lab of Marine Environmental Science, Xiamen University, Xiamen 361102, China.
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35
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Shi W, Zhang Y, Chen S, Polle A, Rennenberg H, Luo ZB. Physiological and molecular mechanisms of heavy metal accumulation in nonmycorrhizal versus mycorrhizal plants. PLANT, CELL & ENVIRONMENT 2019; 42:1087-1103. [PMID: 30375657 DOI: 10.1111/pce.13471] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 10/26/2018] [Accepted: 10/26/2018] [Indexed: 06/08/2023]
Abstract
Uptake, translocation, detoxification, and sequestration of heavy metals (HMs) are key processes in plants to deal with excess amounts of HM. Under natural conditions, plant roots often establish ecto- and/or arbuscular-mycorrhizae with their fungal partners, thereby altering HM accumulation in host plants. This review considers the progress in understanding the physiological and molecular mechanisms involved in HM accumulation in nonmycorrhizal versus mycorrhizal plants. In nonmycorrhizal plants, HM ions in the cells can be detoxified with the aid of several chelators. Furthermore, HMs can be sequestered in cell walls, vacuoles, and the Golgi apparatus of plants. The uptake and translocation of HMs are mediated by members of ZIPs, NRAMPs, and HMAs, and HM detoxification and sequestration are mainly modulated by members of ABCs and MTPs in nonmycorrhizal plants. Mycorrhizal-induced changes in HM accumulation in plants are mainly due to HM sequestration by fungal partners and improvements in the nutritional and antioxidative status of host plants. Furthermore, mycorrhizal fungi can trigger the differential expression of genes involved in HM accumulation in both partners. Understanding the molecular mechanisms that underlie HM accumulation in mycorrhizal plants is crucial for the utilization of fungi and their host plants to remediate HM-contaminated soils.
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Affiliation(s)
- Wenguang Shi
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Yuhong Zhang
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Shaoliang Chen
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
| | - Andrea Polle
- Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, 100083, China
- Forest Botany and Tree Physiology, University of Goettingen, 37077, Göttingen, Germany
| | - Heinz Rennenberg
- Institute for Forest Sciences, University of Freiburg, 79110, Freiburg, Germany
| | - Zhi-Bin Luo
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Silviculture of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
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36
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Yue L, Chen F, Yu K, Xiao Z, Yu X, Wang Z, Xing B. Early development of apoplastic barriers and molecular mechanisms in juvenile maize roots in response to La 2O 3 nanoparticles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 653:675-683. [PMID: 30759593 DOI: 10.1016/j.scitotenv.2018.10.320] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 10/20/2018] [Accepted: 10/24/2018] [Indexed: 05/27/2023]
Abstract
The increasing occurrence of engineered nanoparticles (NPs) in soils may decrease water uptake in crops, followed by lower crop yield and quality. As one of the most common rare earth oxide NPs, lanthanum oxide (La2O3) NPs may inhibit the relative expressions of aquaporin genes, thus reduce water uptake. In the present study, maize plants were exposed to different La2O3 NPs concentrations (0, 5, 50 mg L-1) for 72 h and 144 h right after the first leaf extended completely. Our results revealed that water uptake was reduced by La2O3 NPs through accelerating the development of apoplastic barriers in maize roots. The level of abscisic acid, determined by using ultra high performance liquid chromatography-tandem mass spectrometry, was increased upon La2O3 NPs exposure. Furthermore, ZmPAL, ZmCCR2 and ZmCAD6, the core genes specific for biosynthesis of lignin, were up-regulated by 3-13 fold in roots exposed to 50 mg L-1 La2O3 NPs. However, ZmF5H was suppressed, indicating that lignin with S units could be excluded for the formed lignin in apoplastic barriers upon La2O3 NPs exposure. The level of essential component of apoplastic barriers - lignin was increased by 1.5-fold. The early development of apoplastic barriers was observed, and stomatal conductance and transpiration rate of La2O3 NPs-treated plants were significantly decreased by 63%-83% and 42%-86%, respectively, as compared to the control. The lignin enriched apoplastic barriers in juvenile maize thus led to the reduction of water uptake, subsequently causing significant growth inhibition. This is the first study to show early development of root apoplastic barriers upon La2O3 NPs exposure. This study will help us better understand the function of apoplastic barriers in roots in response to NPs, further providing fundamental knowledge to develop safer and more efficient agricultural nanotechnology.
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Affiliation(s)
- Le Yue
- Institute of Environmental Processes and Pollution Control, and School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Feiran Chen
- Institute of Environmental Processes and Pollution Control, and School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Kaiqiang Yu
- College of Environmental Science and Engineering, and Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao 266100, China
| | - Zhenggao Xiao
- Institute of Environmental Processes and Pollution Control, and School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Xiaoyu Yu
- College of Environmental Science and Engineering, and Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China, Qingdao 266100, China
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control, and School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China.
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States.
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Kidwai M, Dhar YV, Gautam N, Tiwari M, Ahmad IZ, Asif MH, Chakrabarty D. Oryza sativa class III peroxidase (OsPRX38) overexpression in Arabidopsis thaliana reduces arsenic accumulation due to apoplastic lignification. JOURNAL OF HAZARDOUS MATERIALS 2019; 362:383-393. [PMID: 30245406 DOI: 10.1016/j.jhazmat.2018.09.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/07/2018] [Accepted: 09/09/2018] [Indexed: 05/10/2023]
Abstract
ClassIII peroxidases are multigene family of plant-specific peroxidase enzyme. They are involved in various physiological and developmental processes like auxin catabolism, cell metabolism, various biotic, abiotic stresses and cell elongation. In the present study, we identified a class III peroxidase (OsPRX38) from rice which is upregulated several folds in both arsenate (AsV) and arsenite (AsIII) stresses. The overexpression of OsPRX38 in Arabidopsis thaliana significantly enhances Arsenic (As) tolerance by increasing SOD, PRX GST activity and exhibited low H2O2, electrolyte leakage and malondialdehyde content. OsPRX38 overexpression also affect the plant growth by increasing total biomass and seeds production in transgenics than WT under As stress condition. Confocal microscopy revealed that the OsPRX38-YFP fusion protein was localized to the apoplast of the onion epidermal cells. In addition, lignification was positively correlated with an increase in cell-wall-associated peroxidase activities in transgenic plants. This study indicates the role of OsPRX38 in lignin biosynthesis, where lignin act as an apoplastic barrier for As entry in root cells leading to reduction of As accumulation in transgenic. Overall the study suggests that overexpression of OsPRX38 in Arabidopsis thaliana activates the signaling network of different antioxidant systems under As stress condition, enhancing the plant tolerance by reducing As accumulation due to high lignification.
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Affiliation(s)
- Maria Kidwai
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India; Integral University, Kursi road, Lucknow, Uttar Pradesh, India
| | - Yogeshwar Vikram Dhar
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India; Academy of Scientific and Innovative Research, New Delhi, India
| | - Neelam Gautam
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India; Academy of Scientific and Innovative Research, New Delhi, India
| | - Madhu Tiwari
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India
| | | | - Mehar Hasan Asif
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India; Academy of Scientific and Innovative Research, New Delhi, India
| | - Debasis Chakrabarty
- CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India; Academy of Scientific and Innovative Research, New Delhi, India.
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Metwally AM, Radi AA, El-Shazoly RM, Hamada AM. The role of calcium, silicon and salicylic acid treatment in protection of canola plants against boron toxicity stress. JOURNAL OF PLANT RESEARCH 2018; 131:1015-1028. [PMID: 29357048 DOI: 10.1007/s10265-018-1008-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 11/14/2017] [Indexed: 05/11/2023]
Abstract
Boron (B) toxicity often limits crop yield and the quality of production in agricultural areas. Here, we investigated the effects of calcium (Ca), silicon (Si) and salicylic acid (SA) on development of B toxicity, B allocation in canola (Brassica napus cultivar Sarw 4) and its role in non-enzymatic antioxidants in relation to yield of this cultivar under B toxicity. Canola seedlings were subjected to four B levels induced by boric acid in the absence or presence of Ca, Si and SA. The results showed that Ca, Si and SA addition ameliorated the inhibition in canola growth, water content (WC), and improved siliqua number, siliqua weight and seed index. The B content in shoots and roots and total B accumulation in the whole plant were increased in control plants under B-toxicity-stress, and these parameters were significantly decreased by addition of Ca, Si and SA. The shoot ascorbate pool (ascorbate, AsA, and dehydroascorbate, DHA), α-tocopherol and phenolics (free and bound) were increased under B toxicity, and were significantly decreased in most cases by addition of Ca, Si and SA, except α-tocopherol, which increased at low B levels (0, 25 and 50 mg kg soil-1). The glutathione content did not obviously change by B stress, while added Ca, Si and SA inhibited its accumulation under B stress. In addition, B toxicity reduced the shoot flavonoids content; however, this reduction was not alleviated by the use of Ca, Si and SA treatments. It could be concluded that growth and yield of canola plants grown under high B concentration improved after external application of Ca, Si or SA.
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Affiliation(s)
- Ashraf M Metwally
- Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt
- Biological Sciences Department, Faculty of Science, King Faisal University, Hofuf, 31982, Saudi Arabia
| | - Abeer A Radi
- Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | - Rasha M El-Shazoly
- Botany Department, Faculty of Science, Assiut University, New Valley, Egypt
| | - Afaf M Hamada
- Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt.
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Agnihotri A, Gupta P, Dwivedi A, Seth CS. Counteractive mechanism (s) of salicylic acid in response to lead toxicity in Brassica juncea (L.) Czern. cv. Varuna. PLANTA 2018; 248:49-68. [PMID: 29564629 DOI: 10.1007/s00425-018-2867-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 02/17/2018] [Indexed: 06/08/2023]
Abstract
Salicylic acid alleviates lead toxicity in Brassica juncea (L.) by promoting growth under non-stress and activating stress-defense mechanism (s) under lead stress conditions. It also boosts the ascorbate-glutathione cycle and thus helps in minimizing oxidative and DNA damage. Brassica juncea plants were exposed to different concentrations (0, 500, 1000 and 2000 mg kg-1) of lead (Pb) and subsequently sprayed with 0.5 mM of salicylic acid (SA) to check for morphological and leaf gas exchange parameters like transpiration rate (E), stomatal conductance (GH2O), net photosynthetic rate (A) and maximum quantum yield of PS II (Fv/Fm). Leaf epidermis by scanning electron microscopy (SEM), enzymatic and non-enzymatic components of ascorbate-glutathione (AsA-GSH) cycle, DNA damage by comet assay, lipid peroxidation and endogenous SA quantification by HPLC were analyzed. Lead accumulation in root, shoot and its sub-cellular distribution ratio (SDR) and localization was also determined using atomic absorption spectroscopy (AAS) and rhodizonate-dye staining method, respectively. Results revealed that notable amount of Pb was accumulated in root and shoot in dose-dependent manner which significantly (P ≤ 0.05) posed the toxicity on the majority of morphological parameters, structural integrity of epidermal and guard cells, photosynthetic pigments, malondialdehyde (MDA) and H2O2 content. Notable decrease in leaf gas exchange parameters, Fv/Fm, poor performance of AsA-GSH cycle and striking amount of DNA damage, was found as well. However, SA revoked Pb toxicity to a great extent by promoting growth, chlorophyll content, improving the A, Fv/Fm, boosting the overall performance of AsA-GSH cycle and by lessening the DNA damage.
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Affiliation(s)
| | - Praveen Gupta
- Department of Botany, University of Delhi, Delhi, 110007, India
| | - Anuj Dwivedi
- Department of Botany, University of Delhi, Delhi, 110007, India
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, 110067, India
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Garcia JS, Dalmolin ÂC, Cortez PA, Barbeira PS, Mangabeira PAO, França MGC. Short-term cadmium exposure induces gas exchanges, morphological and ultrastructural disturbances in mangrove Avicennia schaueriana young plants. MARINE POLLUTION BULLETIN 2018; 131:122-129. [PMID: 29886928 DOI: 10.1016/j.marpolbul.2018.03.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 03/29/2018] [Accepted: 03/30/2018] [Indexed: 06/08/2023]
Abstract
Mangroves have been subject to more metal contamination, including cadmium (Cd). This study evaluated if a relatively short Cd exposure may induce metabolic, morphological and ultrastructural cell disturbance in Avicennia schaueriana. Cd induced evident constraints to seedlings since there was reduction in leaf gas exchanges and the plants did not survive for more than 10 days at a higher Cd exposure in controlled conditions. The highest Cd accumulation was observed in roots and gradually less in stem and leaves. Cadmium induced lignin deposition was observed in xylem cells of all vegetative organs. Intense sclerification in xylem cells, endoderm and change in the hypoderm organization were also detected. Cadmium clearly induced chloroplast deformities with ruptures of its membranes, thylakoids and core and provoked cytoplasm disorganization. These metal constraints under natural conditions for long term can lead to the accumulation of cellular and metabolic damages and jeopardize seedlings establishment and local biodiversity.
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Affiliation(s)
- Janaina S Garcia
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900, Brazil; Instituto de Ciências Biológicas, Departamento de Botânica, Universidade Federal de Minas Gerais, 6627 Av. Antônio Carlos, 31270-901, Brazil
| | - Ândrea C Dalmolin
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900, Brazil
| | - Priscila A Cortez
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900, Brazil
| | - Paulo S Barbeira
- Instituto de Ciências Exatas, Departamento de Química, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 31270-901, Brazil
| | - Pedro A O Mangabeira
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, 45662-900, Brazil.
| | - Marcel G C França
- Instituto de Ciências Biológicas, Departamento de Botânica, Universidade Federal de Minas Gerais, 6627 Av. Antônio Carlos, 31270-901, Brazil.
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Rana V, Maiti SK. Differential distribution of metals in tree tissues growing on reclaimed coal mine overburden dumps, Jharia coal field (India). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:9745-9758. [PMID: 29368202 DOI: 10.1007/s11356-018-1254-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 01/09/2018] [Indexed: 05/13/2023]
Abstract
Opencast bituminous coal mining invariably generates huge amount of metal-polluted waste rocks (stored as overburden (OB) dumps) and reclaimed by planting fast growing hardy tree species which accumulate metals in their tissues. In the present study, reclaimed OB dumps located in Jharia coal field (Jharkhand, India) were selected to assess the accumulation of selected metals (Pb, Zn, Mn, Cu and Co) in tissues (leaf, stem bark, stem wood, root bark and root wood) of two commonly planted tree species (Acacia auriculiformis A.Cunn. ex Benth. and Melia azedarach L.). In reclaimed mine soil (RMS), the concentrations of pseudo-total and available metals (DTPA-extractable) were found 182-498 and 196-1877% higher, respectively, than control soil (CS). The positive Spearman's correlation coefficients between pseudo-total concentration of Pb and Cu (r = 0.717; p < 0.05), Pb and Co (r = 0.650; p < 0.05), Zn and Mn (0.359), Cu and Co (r = 0.896; p < 0.01) suggested similar sources for Pb-Cu-Co and Mn-Zn. Among the five tree tissues considered, Pb selectively accumulated in root bark, stem bark and leaves; Zn and Mn in leaves; and Cu in root wood and stem wood. These results suggested metal accumulation to be "tissue-specific". The biological indices (BCF, TFleaf, TFstem bark and TFstem wood) indicated variation in metal uptake potential of different tree tissues. The study indicated that A. auriculiformis could be employed for Mn phytoextraction (BCF, TFleaf, TFstem bark and TFstem wood > 1). The applicability of both the trees in Cu phytostabilization (BCF > 1; TFleaf, TFstem bark and TFstem wood < 1) was suggested. The study enhanced knowledge about the selection of tree species for the phytoremediation of coal mine OB dumps and specific tree tissues for monitoring metal pollution.
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Affiliation(s)
- Vivek Rana
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India
| | - Subodh Kumar Maiti
- Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India.
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Cheng S, Tam NFY, Li R, Shen X, Niu Z, Chai M, Qiu GY. Temporal variations in physiological responses of Kandelia obovata seedlings exposed to multiple heavy metals. MARINE POLLUTION BULLETIN 2017; 124:1089-1095. [PMID: 28442201 DOI: 10.1016/j.marpolbul.2017.03.060] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 03/21/2017] [Accepted: 03/29/2017] [Indexed: 06/07/2023]
Abstract
A study was conducted to quantify temporal variations in physiological responses of Kandelia obovata under multiple heavy metal stress. The results showed that plant growth was not significantly affected by multiple heavy metal stress during the 120-days experiment. At the start, levels of net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) showed effects of "low-promotion, high-inhibition", but Pn and Gs reduced with increasing heavy metal stress at the end. Temporary lipid oxidation was shown by high levels of malondialdehyde (MDA) under high heavy metal stress at the start but was unaffected at the end of the experiment. MDA negatively correlated with biomass and photosynthetic parameters and acted as a sensitive indicator. Proline also shared similar trend and indicated its temporary role in osmotic adjustment. Negative correlations between osmotic adjustment matter and photosynthetic parameters further confirmed the significant role of osmotic adjustment under heavy metal stress.
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Affiliation(s)
- Shanshan Cheng
- School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, Guangdong, China
| | - Nora Fung Yee Tam
- Department of Biology and Chemistry, City University of Hong Kong, Kowloon Tong, Hong Kong, China
| | - Ruili Li
- School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, Guangdong, China.
| | - Xiaoxue Shen
- School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, Guangdong, China
| | - Zhiyuan Niu
- School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, Guangdong, China
| | - Minwei Chai
- School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, Guangdong, China
| | - Guo Yu Qiu
- School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, Guangdong, China.
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Nawaz F, Naeem M, Akram A, Ashraf MY, Ahmad KS, Zulfiqar B, Sardar H, Shabbir RN, Majeed S, Shehzad MA, Anwar I. Seed priming with KNO 3 mediates biochemical processes to inhibit lead toxicity in maize (Zea mays L.). JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:4780-4789. [PMID: 28369913 DOI: 10.1002/jsfa.8347] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 03/21/2017] [Accepted: 03/27/2017] [Indexed: 05/07/2023]
Abstract
BACKGROUND Accumulation of lead (Pb) in agricultural soils has become a major factor for reduced crop yields and poses serious threats to humans consuming agricultural products. The present study investigated the effects of KNO3 seed priming (0 and 0.5% KNO3 ) on growth of maize (Zea mays L.) seedlings exposed to Pb toxicity (0, 1300 and 2550 mg kg-1 Pb). RESULTS Pb exposure markedly reduced the growth of maize seedlings and resulted in higher Pb accumulation in roots than shoots. Pretreatment of seeds with KNO3 significantly improved the germination percentage and increased physiological indices. A stimulating effect of KNO3 seed priming was also observed on pigments (chlorophyll a, b, total chlorophyll and carotenoid contents) of Pb-stressed plants. Low translocation of Pb from roots to shoots caused an increased accumulation of total free amino acids and higher activities of catalase, peroxidase, superoxide dismutase and ascorbate peroxidase in roots as compared to shoot, which were further enhanced by exogenous KNO3 supply to prevent Pb toxicity. CONCLUSION Maize accumulates more Pb in roots than shoot at early growth stages. Priming of seeds with KNO3 prevents Pb toxicity, which may be exploited to improve seedling establishment in crop species grown under Pb contaminated soils. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Fahim Nawaz
- Department of Agronomy, MNS University of Agriculture, Multan, Pakistan
| | - Muhammad Naeem
- Department of Agronomy, UCA & ES, The Islamia University of Bahawalpur, Pakistan
| | - Asim Akram
- Department of Agronomy, UCA & ES, The Islamia University of Bahawalpur, Pakistan
| | | | - Khawaja S Ahmad
- Department of Botany, University of Poonch, Rawalakot, Pakistan
| | - Bilal Zulfiqar
- Department of Agronomy, UCA & ES, The Islamia University of Bahawalpur, Pakistan
| | - Hasan Sardar
- Department of Horticulture, Agriculture College, Bahauddin Zakariya University, Multan, Pakistan
| | - Rana N Shabbir
- Department of Agronomy, Agriculture College, Bahauddin Zakariya University, Multan, Pakistan
| | - Sadia Majeed
- Department of Agronomy, UCA & ES, The Islamia University of Bahawalpur, Pakistan
| | | | - Irfan Anwar
- Department of Agronomy, UCA & ES, The Islamia University of Bahawalpur, Pakistan
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Loix C, Huybrechts M, Vangronsveld J, Gielen M, Keunen E, Cuypers A. Reciprocal Interactions between Cadmium-Induced Cell Wall Responses and Oxidative Stress in Plants. FRONTIERS IN PLANT SCIENCE 2017; 8:1867. [PMID: 29163592 PMCID: PMC5671638 DOI: 10.3389/fpls.2017.01867] [Citation(s) in RCA: 142] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 10/12/2017] [Indexed: 05/18/2023]
Abstract
Cadmium (Cd) pollution renders many soils across the world unsuited or unsafe for food- or feed-orientated agriculture. The main mechanism of Cd phytotoxicity is the induction of oxidative stress, amongst others through the depletion of glutathione. Oxidative stress can damage lipids, proteins, and nucleic acids, leading to growth inhibition or even cell death. The plant cell has a variety of tools to defend itself against Cd stress. First and foremost, cell walls might prevent Cd from entering and damaging the protoplast. Both the primary and secondary cell wall have an array of defensive mechanisms that can be adapted to cope with Cd. Pectin, which contains most of the negative charges within the primary cell wall, can sequester Cd very effectively. In the secondary cell wall, lignification can serve to immobilize Cd and create a tougher barrier for entry. Changes in cell wall composition are, however, dependent on nutrients and conversely might affect their uptake. Additionally, the role of ascorbate (AsA) as most important apoplastic antioxidant is of considerable interest, due to the fact that oxidative stress is a major mechanism underlying Cd toxicity, and that AsA biosynthesis shares several links with cell wall construction. In this review, modifications of the plant cell wall in response to Cd exposure are discussed. Focus lies on pectin in the primary cell wall, lignification in the secondary cell wall and the importance of AsA in the apoplast. Regarding lignification, we attempt to answer the question whether increased lignification is merely a consequence of Cd toxicity, or rather an elicited defense response. We propose a model for lignification as defense response, with a central role for hydrogen peroxide as substrate and signaling molecule.
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Affiliation(s)
| | | | | | | | | | - Ann Cuypers
- Environmental Biology, Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
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Pittarello M, Busato JG, Carletti P, Dobbss LB. Possible developments for ex situ phytoremediation of contaminated sediments, in tropical and subtropical regions - Review. CHEMOSPHERE 2017; 182:707-719. [PMID: 28531837 DOI: 10.1016/j.chemosphere.2017.04.093] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 03/23/2017] [Accepted: 04/20/2017] [Indexed: 06/07/2023]
Abstract
The growing problem of remediation of contaminated sediments dredged from harbor channels needs to be resolved by a cost effective and sustainable technology. Phytoremediation, by ex situ remediation plants, seems to have the potential to replace traditional methods in case of moderately contaminated sediments. On the other side, the need to mix sediments with soil and/or sand to allow an easier establishment of most employed species causes an increase of the volume of the processed substrate up to 30%. Moreover the majority of phytoremediating species are natives of temperate climate belt. Mangroves, with a special focus on the genus Avicennia - a salt secreting species - should represent an effective alternative in terms of adaptation to salty, anoxic sediments and an opportunity to develop ex situ phytoremediation plants in tropical and subtropical regions. The use of humic acid to increase root development, cell antioxidant activity and the potential attenuation of the "heavy metals exclusion strategy" to increase phytoextraction potentials of mangroves will be reviewed.
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Affiliation(s)
- Marco Pittarello
- University of Vila Velha, Ecology of Organic Matter Laboratory, Biopraticas Compound, Vila Velha, ES, Brazil.
| | - Jader Galba Busato
- University of Brasilia, Faculty of Agronomy and Veterinary Medicine, University Campus Darcy Ribeiro, Sciences Central Institute, Federal District, Brazil
| | - Paolo Carletti
- Department of Agronomy, Food, Natural Resources, Animals and Environment (DAFNAE), University of Padova, Padova, Italy
| | - Leonardo Barros Dobbss
- Federal University of Vales do Jequitinhonha e Mucuri, Institute of Agricultural Sciences, Unaí, MG, Brazil
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Dai M, Liu J, Liu W, Lu H, Jia H, Hong H, Yan C. Phosphorus effects on radial oxygen loss, root porosity and iron plaque in two mangrove seedlings under cadmium stress. MARINE POLLUTION BULLETIN 2017; 119:262-269. [PMID: 28427774 DOI: 10.1016/j.marpolbul.2017.04.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/08/2017] [Accepted: 04/08/2017] [Indexed: 06/07/2023]
Abstract
Phosphorus is an indispensable element for plants, but its role in alleviating the cadmium toxicity of mangrove seedlings is poorly documented. In this study, mangrove seedlings were grown in hydroponics and exposed to various Cd and P treatments. Data suggested that the inhibitory effect of Cd on the rate of radial oxygen loss and root porosity was alleviated by P. A. marina had a higher rate of ROL and POR, indicating that it had a stronger adaptability to anaerobic environment. K. obovata induced a higher Fe concentration in iron plaque under co-application of Cd and P, which may relate to higher biomass. Furthermore, P increased Cd concentration in iron plaque, implying that iron plaque can be an obstacle to prevent Cd entering into the plant, but most Cd was still distributed in its roots. These findings highlight a novel mechanism of Cd detoxification with P addition in mangrove seedlings.
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Affiliation(s)
- Minyue Dai
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China
| | - Jingchun Liu
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China
| | - Wenwen Liu
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China
| | - Haoliang Lu
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China
| | - Hui Jia
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China
| | - Hualong Hong
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China
| | - Chongling Yan
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, China; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361102, China.
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Patanun O, Ueda M, Itouga M, Kato Y, Utsumi Y, Matsui A, Tanaka M, Utsumi C, Sakakibara H, Yoshida M, Narangajavana J, Seki M. The Histone Deacetylase Inhibitor Suberoylanilide Hydroxamic Acid Alleviates Salinity Stress in Cassava. FRONTIERS IN PLANT SCIENCE 2016; 7:2039. [PMID: 28119717 PMCID: PMC5220070 DOI: 10.3389/fpls.2016.02039] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Accepted: 12/20/2016] [Indexed: 05/20/2023]
Abstract
Cassava (Manihot esculenta Crantz) demand has been rising because of its various applications. High salinity stress is a major environmental factor that interferes with normal plant growth and limits crop productivity. As well as genetic engineering to enhance stress tolerance, the use of small molecules is considered as an alternative methodology to modify plants with desired traits. The effectiveness of histone deacetylase (HDAC) inhibitors for increasing tolerance to salinity stress has recently been reported. Here we use the HDAC inhibitor, suberoylanilide hydroxamic acid (SAHA), to enhance tolerance to high salinity in cassava. Immunoblotting analysis reveals that SAHA treatment induces strong hyper-acetylation of histones H3 and H4 in roots, suggesting that SAHA functions as the HDAC inhibitor in cassava. Consistent with increased tolerance to salt stress under SAHA treatment, reduced Na+ content and increased K+/Na+ ratio were detected in SAHA-treated plants. Transcriptome analysis to discover mechanisms underlying salinity stress tolerance mediated through SAHA treatment reveals that SAHA enhances the expression of 421 genes in roots under normal condition, and 745 genes at 2 h and 268 genes at 24 h under both SAHA and NaCl treatment. The mRNA expression of genes, involved in phytohormone [abscisic acid (ABA), jasmonic acid (JA), ethylene, and gibberellin] biosynthesis pathways, is up-regulated after high salinity treatment in SAHA-pretreated roots. Among them, an allene oxide cyclase (MeAOC4) involved in a crucial step of JA biosynthesis is strongly up-regulated by SAHA treatment under salinity stress conditions, implying that JA pathway might contribute to increasing salinity tolerance by SAHA treatment. Our results suggest that epigenetic manipulation might enhance tolerance to high salinity stress in cassava.
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Affiliation(s)
- Onsaya Patanun
- Plant Biochemistry and Molecular Genetics Laboratory, Department of Biotechnology, Faculty of Science, Mahidol UniversityBangkok, Thailand
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
| | - Minoru Ueda
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
- CREST, Japan Science and Technology AgencySaitama, Japan
| | - Misao Itouga
- Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
| | - Yukari Kato
- Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
| | - Yoshinori Utsumi
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
| | - Akihiro Matsui
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
| | - Maho Tanaka
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
| | - Chikako Utsumi
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
- CREST, Japan Science and Technology AgencySaitama, Japan
| | - Hitoshi Sakakibara
- Plant Productivity Systems Research Group, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
| | - Minoru Yoshida
- Chemical Genomics Research Group, RIKEN Center for Sustainable Resource ScienceSaitama, Japan
| | - Jarunya Narangajavana
- Plant Biochemistry and Molecular Genetics Laboratory, Department of Biotechnology, Faculty of Science, Mahidol UniversityBangkok, Thailand
| | - Motoaki Seki
- Plant Genomic Network Research Team, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
- CREST, Japan Science and Technology AgencySaitama, Japan
- Plant Genomic Network Science Division, Kihara Institute for Biological Research, Yokohama City UniversityYokohama, Japan
- *Correspondence: Motoaki Seki
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Cheng H, Wang YS, Fei J, Jiang ZY, Ye ZH. Differences in root aeration, iron plaque formation and waterlogging tolerance in six mangroves along a continues tidal gradient. ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:1659-1667. [PMID: 25956983 DOI: 10.1007/s10646-015-1474-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/28/2015] [Indexed: 06/04/2023]
Abstract
Mangrove is a special coastal forest along tropical and subtropical intertidal shores. However, how mangroves adapt to tidal flooding and the mechanisms involved in mangrove zonation are still poorly understood. In this study, a pot trial with different tide treatments was conducted to investigate the differences in root anatomy, porosity, radial oxygen loss, iron plaque formation and waterlogging tolerance among six mangroves along a continuous tidal gradient. The index of waterlogging tolerance illustrated that Sonneratia apetala possessed the highest index, followed by Aeguceras corniculatum/Kandelia, Rhizophora stylosa, Heritiera littorlis and Thespesia populnea. Waterlogging tolerances of the mangroves were found to be positively correlated with their root porosity, radial oxygen loss and iron plaque formation. Waterlogging-sensitive species such as landward semi-mangroves exhibited small root porosity and ROL, while waterlogging-tolerant species such as seaward pioneer and rhizophoraceous mangroves exhibited extensive porosity, ROL and iron plaque formation. Nevertheless, grater root porosity and iron plaque formation were detected in permanent waterlogged plants when compared to drained plants. In conclusion, The present study proposes a structural adaptive strategy to tidal flooding in mangroves, such that the mangroves with higher root porosity, ROL and iron plaque appeared to exhibit higher waterlogging tolerance and adaptability in anaerobic foreshores.
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Affiliation(s)
- Hao Cheng
- State Key Laboratory of Tropical Oceanography and Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography and Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
| | - Jiao Fei
- State Key Laboratory of Tropical Oceanography and Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Zhao-Yu Jiang
- State Key Laboratory of Tropical Oceanography and Daya Bay Marine Biology Research Station, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Zhi-Hong Ye
- State Key Laboratory for Bio-control, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510006, China
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