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Dong B, Meng D, Song Z, Cao H, Du T, Qi M, Wang S, Xue J, Yang Q, Fu Y. CcNFYB3-CcMATE35 and LncRNA CcLTCS-CcCS modules jointly regulate the efflux and synthesis of citrate to enhance aluminium tolerance in pigeon pea. PLANT BIOTECHNOLOGY JOURNAL 2024; 22:181-199. [PMID: 37776153 PMCID: PMC10754017 DOI: 10.1111/pbi.14179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 09/03/2023] [Accepted: 09/10/2023] [Indexed: 10/01/2023]
Abstract
Aluminium (Al) toxicity decreases crop production in acid soils in general, but many crops have evolved complex mechanisms to resist it. However, our current understanding of how plants cope with Al stress and perform Al resistance is still at the initial stage. In this study, the citrate transporter CcMATE35 was identified to be involved in Al stress response. The release of citrate was increased substantially in CcMATE35 over-expression (OE) lines under Al stress, indicating enhanced Al resistance. It was demonstrated that transcription factor CcNFYB3 regulated the expression of CcMATE35, promoting the release of citrate from roots to increase Al resistance in pigeon pea. We also found that a Long noncoding RNA Targeting Citrate Synthase (CcLTCS) is involved in Al resistance in pigeon pea. Compared with controls, overexpression of CcLTCS elevated the expression level of the Citrate Synthase gene (CcCS), leading to increases in root citrate level and citrate release, which forms another module to regulate Al resistance in pigeon pea. Simultaneous overexpression of CcNFYB3 and CcLTCS further increased Al resistance. Taken together, these findings suggest that the two modules, CcNFYB3-CcMATE35 and CcLTCS-CcCS, jointly regulate the efflux and synthesis of citrate and may play an important role in enhancing the resistance of pigeon pea under Al stress.
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Affiliation(s)
- Biying Dong
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
| | - Dong Meng
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
| | - Zhihua Song
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
| | - Hongyan Cao
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
| | - Tingting Du
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
| | - Meng Qi
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
| | - Shengjie Wang
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
| | - Jingyi Xue
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
| | - Qing Yang
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
| | - Yujie Fu
- State Key Laboratory of Efficient Production of Forest ResourcesBeijing Forestry UniversityBeijingChina
- The Key Laboratory for Silviculture and Conservation of Ministry of EducationBeijing Forestry UniversityBeijingChina
- Ecological Observation and Research Station of Heilongjiang Sanjiang Plain WetlandsNational Forestry and Grassland Administration, Beijing Forestry UniversityBeijingChina
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Ur Rahman S, Han JC, Ahmad M, Ashraf MN, Khaliq MA, Yousaf M, Wang Y, Yasin G, Nawaz MF, Khan KA, Du Z. Aluminum phytotoxicity in acidic environments: A comprehensive review of plant tolerance and adaptation strategies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 269:115791. [PMID: 38070417 DOI: 10.1016/j.ecoenv.2023.115791] [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: 09/20/2023] [Revised: 11/28/2023] [Accepted: 12/04/2023] [Indexed: 01/12/2024]
Abstract
Aluminum (Al), a non-essential metal for plant growth, exerts significant phytotoxic effects, particularly on root growth. Anthropogenic activities would intensify Al's toxic effects by releasing Al3+ into the soil solution, especially in acidic soils with a pH lower than 5.5 and rich mineral content. The severity of Al-induced phytotoxicity varies based on factors such as Al concentration, ionic form, plant species, and growth stages. Al toxicity leads to inhibited root and shoot growth, reduced plant biomass, disrupted water uptake causing nutritional imbalance, and adverse alterations in physiological, biochemical, and molecular processes. These effects collectively lead to diminished plant yield and quality, along with reduced soil fertility. Plants employ various mechanisms to counter Al toxicity under stress conditions, including sequestering Al in vacuoles, exuding organic acids (OAs) like citrate, oxalate, and malate from root tip cells to form Al-complexes, activating antioxidative enzymes, and overexpressing Al-stress regulatory genes. Recent advancements focus on enhancing the exudation of OAs to prevent Al from entering the plant, and developing Al-tolerant varieties. Gene transporter families, such as ATP-Binding Cassette (ABC), Aluminum-activated Malate Transporter (ALMT), Natural resistance-associated macrophage protein (Nramp), Multidrug and Toxic compounds Extrusion (MATE), and aquaporin, play a crucial role in regulating Al toxicity. This comprehensive review examined recent progress in understanding the cytotoxic impact of Al on plants at the cellular and molecular levels. Diverse strategies developed by both plants and scientists to mitigate Al-induced phytotoxicity were discussed. Furthermore, the review explored recent genomic developments, identifying candidate genes responsible for OAs exudation, and delved into genome-mediated breeding initiatives, isolating transgenic and advanced breeding lines to cultivate Al-tolerant plants.
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Affiliation(s)
- Shafeeq Ur Rahman
- Water Science and Environmental Engineering Research Center, College of Chemical and Environmental Engineering, Shenzhen University, Shenzhen 518060, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Jing-Cheng Han
- Water Science and Environmental Engineering Research Center, College of Chemical and Environmental Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Muhammad Ahmad
- Water Science and Environmental Engineering Research Center, College of Chemical and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Muhammad Nadeem Ashraf
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad 38040, Pakistan
| | | | - Maryam Yousaf
- Water Science and Environmental Engineering Research Center, College of Chemical and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yuchen Wang
- Water Science and Environmental Engineering Research Center, College of Chemical and Environmental Engineering, Shenzhen University, Shenzhen 518060, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Ghulam Yasin
- Department of Forestry and Range Management, FAS & T, Bahauddin Zakariya University Multan, Multan 60000, Pakistan
| | | | - Khalid Ali Khan
- Unit of Bee Research and Honey Production, Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, Saudi Arabia; Applied College, King Khalid University, Abha 61413, Saudi Arabia
| | - Zhenjie Du
- Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; Water Environment Factor Risk Assessment Laboratory of Agricultural Products Quality and Safety, Ministry of Agriculture and Rural Affairs, Xinxiang 453002, China.
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Agrahari RK, Kobayashi Y, Enomoto T, Miyachi T, Sakuma M, Fujita M, Ogata T, Fujita Y, Iuchi S, Kobayashi M, Yamamoto YY, Koyama H. STOP1-regulated SMALL AUXIN UP RNA55 ( SAUR55) is involved in proton/malate co-secretion for Al tolerance in Arabidopsis. PLANT DIRECT 2024; 8:e557. [PMID: 38161730 PMCID: PMC10755337 DOI: 10.1002/pld3.557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 10/25/2023] [Accepted: 11/29/2023] [Indexed: 01/03/2024]
Abstract
Proton (H+) release is linked to aluminum (Al)-enhanced organic acids (OAs) excretion from the roots under Al rhizotoxicity in plants. It is well-reported that the Al-enhanced organic acid excretion mechanism is regulated by SENSITIVE TO PROTON RHIZOTOXICITY1 (STOP1), a zinc-finger TF that regulates major Al tolerance genes. However, the mechanism of H+ release linked to OAs excretion under Al stress has not been fully elucidated. Recent physiological and molecular-genetic studies have implicated the involvement of SMALL AUXIN UP RNAs (SAURs) in the activation of plasma membrane H+-ATPases for stress responses in plants. We hypothesized that STOP1 is involved in the regulation of Al-responsive SAURs, which may contribute to the co-secretion of protons and malate under Al stress conditions. In our transcriptome analysis of the roots of the stop1 (sensitive to proton rhizotoxicity1) mutant, we found that STOP1 regulates the transcription of one of the SAURs, namely SAUR55. Furthermore, we observed that the expression of SAUR55 was induced by Al and repressed in the STOP1 T-DNA insertion knockout (KO) mutant (STOP1-KO). Through in silico analysis, we identified a functional STOP1-binding site in the promoter of SAUR55. Subsequent in vitro and in vivo studies confirmed that STOP1 directly binds to the promoter of SAUR55. This suggests that STOP1 directly regulates the expression of SAUR55 under Al stress. We next examined proton release in the rhizosphere and malate excretion in the T-DNA insertion KO mutant of SAUR55 (saur55), in conjunction with STOP1-KO. Both saur55 and STOP1-KO suppressed rhizosphere acidification and malate release under Al stress. Additionally, the root growth of saur55 was sensitive to Al-containing media. In contrast, the overexpressed line of SAUR55 enhanced rhizosphere acidification and malate release, leading to increased Al tolerance. These associations with Al tolerance were also observed in natural variations of Arabidopsis. These findings demonstrate that transcriptional regulation of SAUR55 by STOP1 positively regulates H+ excretion via PM H+-ATPase 2 which enhances Al tolerance by malate secretion from the roots of Arabidopsis. The activation of PM H+-ATPase 2 by SAUR55 was suggested to be due to PP2C.D2/D5 inhibition by interaction on the plasma membrane with its phosphatase. Furthermore, RNAi-suppression of NtSTOP1 in tobacco shows suppression of rhizosphere acidification under Al stress, which was associated with the suppression of SAUR55 orthologs, which are inducible by Al in tobacco. It suggests that transcriptional regulation of Al-inducible SAURs by STOP1 plays a critical role in OAs excretion in several plant species as an Al tolerance mechanism.
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Affiliation(s)
| | | | - Takuo Enomoto
- Faculty of Applied Biological SciencesGifu UniversityGifuJapan
| | - Tasuku Miyachi
- Faculty of Applied Biological SciencesGifu UniversityGifuJapan
| | - Marie Sakuma
- Mass Spectrometry and Microscopy UnitRIKEN Center for Sustainable Resource ScienceTsukubaIbarakiJapan
| | - Miki Fujita
- Mass Spectrometry and Microscopy UnitRIKEN Center for Sustainable Resource ScienceTsukubaIbarakiJapan
| | - Takuya Ogata
- Biological Resources and Post‐harvest DivisionJapan International Research Center for Agricultural Sciences (JIRCAS)TsukubaIbarakiJapan
| | - Yasunari Fujita
- Biological Resources and Post‐harvest DivisionJapan International Research Center for Agricultural Sciences (JIRCAS)TsukubaIbarakiJapan
- Graduate School of Life and Environmental SciencesUniversity of TsukubaTsukubaIbarakiJapan
| | - Satoshi Iuchi
- Experimental Plant DivisionRIKEN BioResource Research CenterTsukubaIbarakiJapan
| | - Masatomo Kobayashi
- Experimental Plant DivisionRIKEN BioResource Research CenterTsukubaIbarakiJapan
| | | | - Hiroyuki Koyama
- Faculty of Applied Biological SciencesGifu UniversityGifuJapan
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Zhan M, Gao J, You J, Guan K, Zheng M, Meng X, Li H, Yang Z. The transcription factor SbHY5 mediates light to promote aluminum tolerance by activating SbMATE and SbSTOP1s expression. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 205:108197. [PMID: 37995579 DOI: 10.1016/j.plaphy.2023.108197] [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: 08/08/2023] [Revised: 10/24/2023] [Accepted: 11/12/2023] [Indexed: 11/25/2023]
Abstract
Aluminum (Al) toxicity is a major factor limiting crop yields in acid soils. Sweet sorghum (Sorghum bicolor L.) is a high-efficient energy crop widely grown in tropical and subtropical regions of the world, where acid soil is common and Al toxicity is widespread. Here, we characterized a transcription factor SbHY5 in sweet sorghum, which mediated light to promote plant Al stress adaptation. The expression of SbHY5 was induced by Al stress and increasing light intensity. The overexpression of SbHY5 improved Al tolerance in transgenic plants, which was associated with increased citrate secretion and reduced Al content in roots. Meanwhile, SbHY5 was found to localize to the nucleus and displayed transcriptional activity. SbHY5 directly activated the expression of SbMATE, indicating that a HY5-MATE-dependent citrate secretion pathway is involved in Al tolerance in plants. SbSTOP1 was reported as a key transcription factor, regulating several Al tolerance genes. Here, inspiringly, we found that SbHY5 directly promoted the transcription of SbSTOP1, implying the existence of HY5-STOP1-Al tolerance genes-mediated regulatory pathways. Besides, SbHY5 positively regulated its own transcription. Our findings revealed a novel regulatory network in which a light signaling factor, SbHY5, confers Al tolerance in plants by modulating the expression of Al stress response genes.
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Affiliation(s)
- Meiqi Zhan
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun, China
| | - Jie Gao
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun, China
| | - Jiangfeng You
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun, China
| | - Kexing Guan
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun, China
| | - Meihui Zheng
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun, China
| | - Xiangxiang Meng
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun, China
| | - He Li
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun, China.
| | - Zhenming Yang
- Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science, Jilin University, Changchun, China.
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5
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Liu C, Hu X, Zang L, Liu X, Wei Y, Wang X, Jin X, Du C, Yu Y, He W, Zhang S. Overexpression of ZmSTOP1-A Enhances Aluminum Tolerance in Arabidopsis by Stimulating Organic Acid Secretion and Reactive Oxygen Species Scavenging. Int J Mol Sci 2023; 24:15669. [PMID: 37958653 PMCID: PMC10649276 DOI: 10.3390/ijms242115669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/14/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023] Open
Abstract
Aluminum (Al) toxicity and low pH are major factors limiting plant growth in acidic soils. Sensitive to Proton Rhizotoxicity 1 (STOP1) transcription factors respond to these stresses by regulating the expression of multiple Al- or low pH-responsive genes. ZmSTOP1-A, a STOP1-like protein from maize (Zea mays), was localized to the nucleus and showed transactivation activity. ZmSTOP1-A was expressed moderately in both roots and shoots of maize seedlings, but was not induced by Al stress or low pH. Overexpression of ZmSTOP1-A in Arabidopsis Atstop1 mutant partially restored Al tolerance and improved low pH tolerance with respect to root growth. Regarding Al tolerance, ZmSTOP1-A/Atstop1 plants showed clear upregulation of organic acid transporter genes, leading to increased organic acid secretion and reduced Al accumulation in roots. In addition, the antioxidant enzyme activity in roots and shoots of ZmSTOP1-A/Atstop1 plants was significantly enhanced, ultimately alleviating Al toxicity via scavenging reactive oxygen species. Similarly, ZmSTOP1-A could directly activate ZmMATE1 expression in maize, positively correlated with the number of Al-responsive GGNVS cis-elements in the ZmMATE1 promoter. Our results reveal that ZmSTOP1-A is an important transcription factor conferring Al tolerance by enhancing organic acid secretion and reactive oxygen species scavenging in Arabidopsis.
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Affiliation(s)
- Chan Liu
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
| | - Xiaoqi Hu
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
| | - Lei Zang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
| | - Xiaofeng Liu
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
| | - Yuhui Wei
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
| | - Xue Wang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
| | - Xinwu Jin
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
| | - Chengfeng Du
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
| | - Yan Yu
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
| | - Wenzhu He
- Crop Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China;
| | - Suzhi Zhang
- Key Laboratory of Biology and Genetic Improvement of Maize in Southwest China of Agricultural Department, Ministry of Agriculture, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China; (C.L.); (X.H.); (L.Z.); (X.L.); (Y.W.); (X.W.); (X.J.); (C.D.); (Y.Y.)
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6
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Li X, Tian Y. STOP1 and STOP1-like proteins, key transcription factors to cope with acid soil syndrome. FRONTIERS IN PLANT SCIENCE 2023; 14:1200139. [PMID: 37416880 PMCID: PMC10321353 DOI: 10.3389/fpls.2023.1200139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 05/25/2023] [Indexed: 07/08/2023]
Abstract
Acid soil syndrome leads to severe yield reductions in various crops worldwide. In addition to low pH and proton stress, this syndrome includes deficiencies of essential salt-based ions, enrichment of toxic metals such as manganese (Mn) and aluminum (Al), and consequent phosphorus (P) fixation. Plants have evolved mechanisms to cope with soil acidity. In particular, STOP1 (Sensitive to proton rhizotoxicity 1) and its homologs are master transcription factors that have been intensively studied in low pH and Al resistance. Recent studies have identified additional functions of STOP1 in coping with other acid soil barriers: STOP1 regulates plant growth under phosphate (Pi) or potassium (K) limitation, promotes nitrate (NO3 -) uptake, confers anoxic tolerance during flooding, and inhibits drought tolerance, suggesting that STOP1 functions as a node for multiple signaling pathways. STOP1 is evolutionarily conserved in a wide range of plant species. This review summarizes the central role of STOP1 and STOP1-like proteins in regulating coexisting stresses in acid soils, outlines the advances in the regulation of STOP1, and highlights the potential of STOP1 and STOP1-like proteins to improve crop production on acid soils.
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Affiliation(s)
- Xinbo Li
- Hainan Yazhou Bay Seed Lab, Sanya, Hainan, China
- Center for Advanced Bioindustry Technologies, and Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yifu Tian
- Hainan Yazhou Bay Seed Lab, Sanya, Hainan, China
- Center for Advanced Bioindustry Technologies, and Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
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Ofoe R, Thomas RH, Asiedu SK, Wang-Pruski G, Fofana B, Abbey L. Aluminum in plant: Benefits, toxicity and tolerance mechanisms. FRONTIERS IN PLANT SCIENCE 2023; 13:1085998. [PMID: 36714730 PMCID: PMC9880555 DOI: 10.3389/fpls.2022.1085998] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 12/23/2022] [Indexed: 06/18/2023]
Abstract
Aluminum (Al) is the third most ubiquitous metal in the earth's crust. A decrease in soil pH below 5 increases its solubility and availability. However, its impact on plants depends largely on concentration, exposure time, plant species, developmental age, and growing conditions. Although Al can be beneficial to plants by stimulating growth and mitigating biotic and abiotic stresses, it remains unknown how Al mediates these effects since its biological significance in cellular systems is still unidentified. Al is considered a major limiting factor restricting plant growth and productivity in acidic soils. It instigates a series of phytotoxic symptoms in several Al-sensitive crops with inhibition of root growth and restriction of water and nutrient uptake as the obvious symptoms. This review explores advances in Al benefits, toxicity and tolerance mechanisms employed by plants on acidic soils. These insights will provide directions and future prospects for potential crop improvement.
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Affiliation(s)
- Raphael Ofoe
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Bible Hill, NS, Canada
| | - Raymond H. Thomas
- School of Science and the Environment, Memorial University of Newfoundland, Grenfell Campus, Corner Brook, NL, Canada
| | - Samuel K. Asiedu
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Bible Hill, NS, Canada
| | - Gefu Wang-Pruski
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Bible Hill, NS, Canada
| | - Bourlaye Fofana
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Bible Hill, NS, Canada
- Charlottetown Research and Development Centre, Agriculture and Agri-Food Canada, Charlottetown, PE, Canada
| | - Lord Abbey
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Bible Hill, NS, Canada
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Hajiboland R, Panda CK, Lastochkina O, Gavassi MA, Habermann G, Pereira JF. Aluminum Toxicity in Plants: Present and Future. JOURNAL OF PLANT GROWTH REGULATION 2022. [DOI: 10.1007/s00344-022-10866-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 10/26/2022] [Indexed: 06/23/2023]
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9
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Jin JF, Zhu HH, He QY, Li PF, Fan W, Xu JM, Yang JL, Chen WW. The Tomato Transcription Factor SlNAC063 Is Required for Aluminum Tolerance by Regulating SlAAE3-1 Expression. FRONTIERS IN PLANT SCIENCE 2022; 13:826954. [PMID: 35371150 PMCID: PMC8965521 DOI: 10.3389/fpls.2022.826954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 01/31/2022] [Indexed: 05/11/2023]
Abstract
Aluminum (Al) toxicity constitutes one of the major limiting factors of plant growth and development on acid soils, which comprises approximately 50% of potentially arable lands worldwide. When suffering Al toxicity, plants reprogram the transcription of genes, which activates physiological and metabolic pathways to deal with the toxicity. Here, we report the role of a NAM, ATAF1, 2 and CUC2 (NAC) transcription factor (TF) in tomato Al tolerance. Among 53 NAC TFs in tomatoes, SlNAC063 was most abundantly expressed in root apex and significantly induced by Al stress. Furthermore, the expression of SlNAC063 was not induced by other metals. Meanwhile, the SlNAC063 protein was localized at the nucleus and has transcriptional activation potentials in yeast. By constructing CRISPR/Cas9 knockout mutants, we found that slnac063 mutants displayed increased sensitivity to Al compared to wild-type plants. However, the mutants accumulated even less Al than wild-type (WT) plants, suggesting that internal tolerance mechanisms but not external exclusion mechanisms are implicated in SlNAC063-mediated Al tolerance in tomatoes. Further comparative RNA-sequencing analysis revealed that only 45 Al-responsive genes were positively regulated by SlNAC063, although the expression of thousands of genes (1,557 upregulated and 636 downregulated) was found to be affected in slnac063 mutants in the absence of Al stress. The kyoto encyclopedia of genes and genomes (KEGG) pathway analysis revealed that SlNAC063-mediated Al-responsive genes were enriched in "phenylpropanoid metabolism," "fatty acid metabolism," and "dicarboxylate metabolism," indicating that SlNAC063 regulates metabolisms in response to Al stress. Quantitative real-time (RT)-PCR analysis showed that the expression of SlAAE3-1 was repressed by SlNAC063 in the absence of Al. However, the expression of SlAAE3-1 was dependent on SlNAC063 in the presence of Al stress. Taken together, our results demonstrate that a NAC TF SlNAC063 is involved in tomato Al tolerance by regulating the expression of genes involved in metabolism, and SlNAC063 is required for Al-induced expression of SlAAE3-1.
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Affiliation(s)
- Jian Feng Jin
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Hui Hui Zhu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Qi Yu He
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Peng Fei Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Wei Fan
- State Key Laboratory of Conservation and Utilization of Bio-Resources in Yunnan, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, National and Local Joint Engineering Research Center on Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming, China
| | - Ji Ming Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Jian Li Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China
- *Correspondence: Jian Li Yang,
| | - Wei Wei Chen
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, China
- Research Centre for Plant RNA Signaling, Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
- Wei Wei Chen,
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10
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Sadhukhan A, Kobayashi Y, Iuchi S, Koyama H. Synergistic and antagonistic pleiotropy of STOP1 in stress tolerance. TRENDS IN PLANT SCIENCE 2021; 26:1014-1022. [PMID: 34253485 DOI: 10.1016/j.tplants.2021.06.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 06/15/2021] [Accepted: 06/17/2021] [Indexed: 05/29/2023]
Abstract
SENSITIVE TO PROTON RHIZOTOXICITY 1 (STOP1) is a master transcription factor (TF) that regulates genes encoding proteins critical for cellular pH homeostasis. STOP1 also causes pleiotropic effects in both roots and shoots associated with various stress tolerances. STOP1-regulated genes in roots synergistically confer tolerance to coexisting stress factors in acid soil, and root-architecture remodeling for superior phosphorus acquisition. Additionally, STOP1 confers salt tolerance to roots under low-potassium conditions. By contrast, STOP1 antagonistically functions in shoots to promote hypoxia tolerance but to suppress drought tolerance. In this review, we discuss how these synergetic- and antagonistic-pleiotropic effects indicate that STOP1 is a central hub of stress regulation and that the harmonization of STOP1-regulated traits is essential for plant adaptation to various environments.
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Affiliation(s)
- Ayan Sadhukhan
- Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Yuriko Kobayashi
- Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Satoshi Iuchi
- Experimental Plant Division, RIKEN Bioresource Research Center, 3-1-1 Koyadai, Tsukuba, 305-0074, Japan
| | - Hiroyuki Koyama
- Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan.
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11
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Sadhukhan A, Agrahari RK, Wu L, Watanabe T, Nakano Y, Panda SK, Koyama H, Kobayashi Y. Expression genome-wide association study identifies that phosphatidylinositol-derived signalling regulates ALUMINIUM SENSITIVE3 expression under aluminium stress in the shoots of Arabidopsis thaliana. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 302:110711. [PMID: 33288018 DOI: 10.1016/j.plantsci.2020.110711] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 10/02/2020] [Accepted: 10/04/2020] [Indexed: 06/12/2023]
Abstract
To identify unknown regulatory mechanisms leading to aluminium (Al)-induction of the Al tolerance gene ALS3, we conducted an expression genome-wide association study (eGWAS) for ALS3 in the shoots of 95 Arabidopsis thaliana accessions in the presence of Al. The eGWAS was conducted using a mixed linear model with 145,940 genome-wide single nucleotide polymorphisms (SNPs) and the association results were validated using reverse genetics. We found that many SNPs from the eGWAS were associated with genes related to phosphatidylinositol metabolism as well as stress signal transduction, including Ca2+signals, inter-connected in a co-expression network. Of these, PLC9, CDPK32, ANAC071, DIR1, and a hypothetical protein (AT4G10470) possessed amino acid sequence/ gene expression level polymorphisms that were significantly associated with ALS3 expression level variation. Furthermore, T-DNA insertion mutants of PLC9, CDPK32, and ANAC071 suppressed shoot ALS3 expression in the presence of Al. This study clarified the regulatory mechanisms of ALS3 expression in the shoot and provided genetic evidence of the involvement of phosphatidylinositol-derived signal transduction under Al stress.
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Affiliation(s)
- Ayan Sadhukhan
- Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu, Gifu 501-1193, Japan
| | - Raj Kishan Agrahari
- Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu, Gifu 501-1193, Japan
| | - Liujie Wu
- Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu, Gifu 501-1193, Japan
| | - Toshihiro Watanabe
- Research Faculty of Agriculture, Hokkaido University, Kita-9, Nishi-9, Kitaku, Sapporo, 060-8589, Japan
| | - Yuki Nakano
- Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu, Gifu 501-1193, Japan
| | - Sanjib Kumar Panda
- Department of Biochemistry, Central University of Rajasthan, Rajasthan 305817, India
| | - Hiroyuki Koyama
- Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu, Gifu 501-1193, Japan
| | - Yuriko Kobayashi
- Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu, Gifu 501-1193, Japan.
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12
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Barros VA, Chandnani R, de Sousa SM, Maciel LS, Tokizawa M, Guimaraes CT, Magalhaes JV, Kochian LV. Root Adaptation via Common Genetic Factors Conditioning Tolerance to Multiple Stresses for Crops Cultivated on Acidic Tropical Soils. FRONTIERS IN PLANT SCIENCE 2020; 11:565339. [PMID: 33281841 PMCID: PMC7688899 DOI: 10.3389/fpls.2020.565339] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Accepted: 10/20/2020] [Indexed: 06/01/2023]
Abstract
Crop tolerance to multiple abiotic stresses has long been pursued as a Holy Grail in plant breeding efforts that target crop adaptation to tropical soils. On tropical, acidic soils, aluminum (Al) toxicity, low phosphorus (P) availability and drought stress are the major limitations to yield stability. Molecular breeding based on a small suite of pleiotropic genes, particularly those with moderate to major phenotypic effects, could help circumvent the need for complex breeding designs and large population sizes aimed at selecting transgressive progeny accumulating favorable alleles controlling polygenic traits. The underlying question is twofold: do common tolerance mechanisms to Al toxicity, P deficiency and drought exist? And if they do, will they be useful in a plant breeding program that targets stress-prone environments. The selective environments in tropical regions are such that multiple, co-existing regulatory networks may drive the fixation of either distinctly different or a smaller number of pleiotropic abiotic stress tolerance genes. Recent studies suggest that genes contributing to crop adaptation to acidic soils, such as the major Arabidopsis Al tolerance protein, AtALMT1, which encodes an aluminum-activated root malate transporter, may influence both Al tolerance and P acquisition via changes in root system morphology and architecture. However, trans-acting elements such as transcription factors (TFs) may be the best option for pleiotropic control of multiple abiotic stress genes, due to their small and often multiple binding sequences in the genome. One such example is the C2H2-type zinc finger, AtSTOP1, which is a transcriptional regulator of a number of Arabidopsis Al tolerance genes, including AtMATE and AtALMT1, and has been shown to activate AtALMT1, not only in response to Al but also low soil P. The large WRKY family of transcription factors are also known to affect a broad spectrum of phenotypes, some of which are related to acidic soil abiotic stress responses. Hence, we focus here on signaling proteins such as TFs and protein kinases to identify, from the literature, evidence for unifying regulatory networks controlling Al tolerance, P efficiency and, also possibly drought tolerance. Particular emphasis will be given to modification of root system morphology and architecture, which could be an important physiological "hub" leading to crop adaptation to multiple soil-based abiotic stress factors.
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Affiliation(s)
- Vanessa A. Barros
- Embrapa Maize and Sorghum, Sete Lagoas, Brazil
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Rahul Chandnani
- Global Institute for Food Security, University of Saskatchewan, Saskatoon, SK, Canada
| | | | - Laiane S. Maciel
- Embrapa Maize and Sorghum, Sete Lagoas, Brazil
- Global Institute for Food Security, University of Saskatchewan, Saskatoon, SK, Canada
| | - Mutsutomo Tokizawa
- Global Institute for Food Security, University of Saskatchewan, Saskatoon, SK, Canada
| | | | - Jurandir V. Magalhaes
- Embrapa Maize and Sorghum, Sete Lagoas, Brazil
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Leon V. Kochian
- Global Institute for Food Security, University of Saskatchewan, Saskatoon, SK, Canada
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13
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Aluminum-Specific Upregulation of GmALS3 in the Shoots of Soybeans: A Potential Biomarker for Managing Soybean Production in Acidic Soil Regions. AGRONOMY-BASEL 2020. [DOI: 10.3390/agronomy10091228] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aluminum (Al) toxicity in acidic soils is a global agricultural problem that limits crop productivity through the inhibition of root growth. However, poor management associated with the application of soil acidity amendments such as lime (CaCO3) in certain crop types can pose a threat to low-input farming practices. Accordingly, it is important to develop appropriate techniques for the management of crop production in acidic soils. In this study, we identified ALS3 (ALUMINUM SENSITIVE 3) in soybeans (Glycine max, cultivar Toyomasari), which is highly expressed in the shoot under Al stress. GmALS3 (Glyma.10G047100) expression was found to be Al-specific under various stress conditions. We analyzed GmALS3 expression in the shoots of soybean plants grown in two different types of acidic soils (artificial and natural acidic soil) with different levels of liming and found that GmALS3 expression was suppressed with levels of liming that have been shown to eliminate soil Al3+ toxicity. Using soybeans as a model, we identified a potential biomarker that could indicate Al toxicity and appropriate liming levels for soybeans cultivated in acidic soils.
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14
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Nakano Y, Kusunoki K, Maruyama H, Enomoto T, Tokizawa M, Iuchi S, Kobayashi M, Kochian LV, Koyama H, Kobayashi Y. A single-population GWAS identified AtMATE expression level polymorphism caused by promoter variants is associated with variation in aluminum tolerance in a local Arabidopsis population. PLANT DIRECT 2020; 4:e00250. [PMID: 32793853 PMCID: PMC7419912 DOI: 10.1002/pld3.250] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 07/10/2020] [Accepted: 07/13/2020] [Indexed: 05/14/2023]
Abstract
Organic acids (OA) are released from roots in response to aluminum (Al), conferring an Al tolerance to plants that is regulated by OA transporters such as ALMT (Al-activated malate transporter) and multi-drug and toxic compound extrusion (MATE). We have previously reported that the expression level polymorphism (ELP) of AtALMT1 is strongly associated with variation in Al tolerance among natural accessions of Arabidopsis. However, although AtMATE is also expressed following Al exposure and contributes to Al tolerance, whether AtMATE contributes to the variation of Al tolerance and the molecular mechanisms of ELP remains unclear. Here, we dissected the natural variation in AtMATE expression level in response to Al at the root using diverse natural accessions of Arabidopsis. Phylogenetic analysis revealed that more than half of accessions belonging to the Central Asia (CA) population show markedly low AtMATE expression levels, while the majority of European populations show high expression levels. The accessions of the CA population with low AtMATE expression also show significantly weakened Al tolerance. A single-population genome-wide association study (GWAS) of AtMATE expression in the CA population identified a retrotransposon insertion in the AtMATE promoter region associated with low gene expression levels. This may affect the transcriptional regulation of AtMATE by disrupting the effect of a cis-regulatory element located upstream of the insertion site, which includes AtSTOP1 (sensitive to proton rhizotoxicity 1) transcription factor-binding sites revealed by chromatin immunoprecipitation-qPCR analysis. Furthermore, the GWAS performed without the accessions expressing low levels of AtMATE, excluding the effect of AtMATE promoter polymorphism, identified several candidate genes potentially associated with AtMATE expression.
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Affiliation(s)
- Yuki Nakano
- Faculty of Applied Biological SciencesGifu UniversityGifuGifuJapan
| | | | - Haruka Maruyama
- Faculty of Applied Biological SciencesGifu UniversityGifuGifuJapan
| | - Takuo Enomoto
- Faculty of Applied Biological SciencesGifu UniversityGifuGifuJapan
| | - Mutsutomo Tokizawa
- Faculty of Applied Biological SciencesGifu UniversityGifuGifuJapan
- Global Institute for Food SecurityUniversity of SaskatchewanSaskatoonSKCanada
| | - Satoshi Iuchi
- Experimental Plant DivisionRIKEN BioResource Research CenterTsukubaIbarakiJapan
| | - Masatomo Kobayashi
- Experimental Plant DivisionRIKEN BioResource Research CenterTsukubaIbarakiJapan
| | - Leon V. Kochian
- Global Institute for Food SecurityUniversity of SaskatchewanSaskatoonSKCanada
| | - Hiroyuki Koyama
- Faculty of Applied Biological SciencesGifu UniversityGifuGifuJapan
| | - Yuriko Kobayashi
- Faculty of Applied Biological SciencesGifu UniversityGifuGifuJapan
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15
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Liu YT, Shi QH, Cao HJ, Ma QB, Nian H, Zhang XX. Heterologous Expression of a Glycine soja C2H2 Zinc Finger Gene Improves Aluminum Tolerance in Arabidopsis. Int J Mol Sci 2020; 21:E2754. [PMID: 32326652 PMCID: PMC7215988 DOI: 10.3390/ijms21082754] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 04/01/2020] [Accepted: 04/07/2020] [Indexed: 11/16/2022] Open
Abstract
Aluminum (Al) toxicity limits plant growth and has a major impact on the agricultural productivity in acidic soils. The zinc-finger protein (ZFP) family plays multiple roles in plant development and abiotic stresses. Although previous reports have confirmed the function of these genes, their transcriptional mechanisms in wild soybean (Glycine soja) are unclear. In this study, GsGIS3 was isolated from Al-tolerant wild soybean gene expression profiles to be functionally characterized in Arabidopsis. Laser confocal microscopic observations demonstrated that GsGIS3 is a nuclear protein, containing one C2H2 zinc-finger structure. Our results show that the expression of GsGIS3 was of a much higher level in the stem than in the leaf and root and was upregulated under AlCl3, NaCl or GA3 treatment. Compared to the control, overexpression of GsGIS3 in Arabidopsis improved Al tolerance in transgenic lines with more root growth, higher proline and lower Malondialdehyde (MDA) accumulation under concentrations of AlCl3. Analysis of hematoxylin staining indicated that GsGIS3 enhanced the resistance of transgenic plants to Al toxicity by reducing Al accumulation in Arabidopsis roots. Moreover, GsGIS3 expression in Arabidopsis enhanced the expression of Al-tolerance-related genes. Taken together, our findings indicate that GsGIS3, as a C2H2 ZFP, may enhance tolerance to Al toxicity through positive regulation of Al-tolerance-related genes.
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Affiliation(s)
- Yuan-Tai Liu
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou 510642, China; (Y.-T.L.); (Q.-H.S.); (H.-J.C.); (Q.-B.M.)
- The Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, South China Agricultural University, Guangzhou 510642, China
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Qi-Han Shi
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou 510642, China; (Y.-T.L.); (Q.-H.S.); (H.-J.C.); (Q.-B.M.)
- The Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, South China Agricultural University, Guangzhou 510642, China
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - He-Jie Cao
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou 510642, China; (Y.-T.L.); (Q.-H.S.); (H.-J.C.); (Q.-B.M.)
- The Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, South China Agricultural University, Guangzhou 510642, China
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Qi-Bin Ma
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou 510642, China; (Y.-T.L.); (Q.-H.S.); (H.-J.C.); (Q.-B.M.)
- The Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, South China Agricultural University, Guangzhou 510642, China
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Hai Nian
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou 510642, China; (Y.-T.L.); (Q.-H.S.); (H.-J.C.); (Q.-B.M.)
- The Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, South China Agricultural University, Guangzhou 510642, China
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
| | - Xiu-Xiang Zhang
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou 510642, China; (Y.-T.L.); (Q.-H.S.); (H.-J.C.); (Q.-B.M.)
- The Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, South China Agricultural University, Guangzhou 510642, China
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
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16
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Time Series RNA-seq in Pigeonpea Revealed the Core Genes in Metabolic Pathways under Aluminum Stress. Genes (Basel) 2020; 11:genes11040380. [PMID: 32244575 PMCID: PMC7230159 DOI: 10.3390/genes11040380] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 02/18/2020] [Accepted: 03/12/2020] [Indexed: 11/17/2022] Open
Abstract
Pigeonpea is an important economic crop in the world and is mainly distributed in tropical and subtropical regions. In order to further expand the scope of planting, one of the problems that must be solved is the impact of soil acidity on plants in these areas. Based on our previous work, we constructed a time series RNA sequencing (RNA-seq) analysis under aluminum (Al) stress in pigeonpea. Through a comparison analysis, 11,425 genes were found to be differentially expressed among all the time points. After clustering these genes by their expression patterns, 12 clusters were generated. Many important functional pathways were identified by gene ontology (GO) analysis, such as biological regulation, localization, response to stimulus, metabolic process, detoxification, and so on. Further analysis showed that metabolic pathways played an important role in the response of Al stress. Thirteen out of the 23 selected genes related to flavonoids and phenols were downregulated in response to Al stress. In addition, we verified these key genes of flavonoid- and phenol-related metabolism pathways by qRT-PCR. Collectively, our findings not only revealed the regulation mechanism of pigeonpea under Al stress but also provided methodological support for further exploration of plant stress regulation mechanisms.
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17
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Yang JL, Fan W, Zheng SJ. Mechanisms and regulation of aluminum-induced secretion of organic acid anions from plant roots. J Zhejiang Univ Sci B 2019; 20:513-527. [PMID: 31090277 DOI: 10.1631/jzus.b1900188] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Aluminum (Al) is the most abundant metal element in the earth's crust. On acid soils, at pH 5.5 or lower, part of insoluble Al-containing minerals become solubilized into soil solution, with resultant highly toxic effects on plant growth and development. Nevertheless, some plants have developed Al-tolerance mechanisms that enable them to counteract this Al toxicity. One such well-documented mechanism is the Al-induced secretion of organic acid anions, including citrate, malate, and oxalate, from plant roots. Once secreted, these anions chelate external Al ions, thus protecting the secreting plant from Al toxicity. Genes encoding the citrate and malate transporters responsible for secretion have been identified and characterized, and accumulating evidence indicates that regulation of the expression of these transporter genes is critical for plant Al tolerance. In this review, we outline the recent history of research into plant Al-tolerance mechanisms, with special emphasis on the physiology of Al-induced secretion of organic acid anions from plant roots. In particular, we summarize the identification of genes encoding organic acid transporters and review current understanding of genes regulating organic acid secretion. We also discuss the possible signaling pathways regulating the expression of organic acid transporter genes.
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Affiliation(s)
- Jian-Li Yang
- Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Wei Fan
- Laboratory of Agricultural Resources and Environment, College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
| | - Shao-Jian Zheng
- Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
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18
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Godon C, Mercier C, Wang X, David P, Richaud P, Nussaume L, Liu D, Desnos T. Under phosphate starvation conditions, Fe and Al trigger accumulation of the transcription factor STOP1 in the nucleus of Arabidopsis root cells. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 99:937-949. [PMID: 31034704 PMCID: PMC6852189 DOI: 10.1111/tpj.14374] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 04/07/2019] [Accepted: 04/24/2019] [Indexed: 05/20/2023]
Abstract
Low-phosphate (Pi) conditions are known to repress primary root growth of Arabidopsis at low pH and in an Fe-dependent manner. This growth arrest requires accumulation of the transcription factor STOP1 in the nucleus, where it activates the transcription of the malate transporter gene ALMT1; exuded malate is suspected to interact with extracellular Fe to inhibit root growth. In addition, ALS3 - an ABC-like transporter identified for its role in tolerance to toxic Al - represses nuclear accumulation of STOP1 and the expression of ALMT1. Until now it was unclear whether Pi deficiency itself or Fe activates the accumulation of STOP1 in the nucleus. Here, by using different growth media to dissociate the effects of Fe from Pi deficiency itself, we demonstrate that Fe is sufficient to trigger the accumulation of STOP1 in the nucleus, which, in turn, activates the expression of ALMT1. We also show that a low pH is necessary to stimulate the Fe-dependent accumulation of nuclear STOP1. Furthermore, pharmacological experiments indicate that Fe inhibits proteasomal degradation of STOP1. We also show that Al acts like Fe for nuclear accumulation of STOP1 and ALMT1 expression, and that the overaccumulation of STOP1 in the nucleus of the als3 mutant grown in low-Pi conditions could be abolished by Fe deficiency. Altogether, our results indicate that, under low-Pi conditions, Fe2/3+ and Al3+ act similarly to increase the stability of STOP1 and its accumulation in the nucleus where it activates the expression of ALMT1.
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Affiliation(s)
- Christian Godon
- Laboratoire de Biologie du Développement des Plantes, Commissariat à l'Énergie Atomique et aux Énergies AlternativesUMR7265 (CEA, Aix‐Marseille Université, CNRS)Saint Paul‐Lez‐DuranceF‐13108France
| | - Caroline Mercier
- Laboratoire de Biologie du Développement des Plantes, Commissariat à l'Énergie Atomique et aux Énergies AlternativesUMR7265 (CEA, Aix‐Marseille Université, CNRS)Saint Paul‐Lez‐DuranceF‐13108France
| | - Xiaoyue Wang
- Ministry of Education Key Laboratory of BioinformaticsCenter for Plant BiologySchool of Life SciencesTsinghua UniversityBeijing100084China
| | - Pascale David
- Laboratoire de Biologie du Développement des Plantes, Commissariat à l'Énergie Atomique et aux Énergies AlternativesUMR7265 (CEA, Aix‐Marseille Université, CNRS)Saint Paul‐Lez‐DuranceF‐13108France
| | - Pierre Richaud
- Laboratoire de Bioénergétique et Biotechnologie des Bactéries et MicroalguesCommissariat à l'Énergie Atomique et aux Énergies AlternativesUMR7265 (CEA, Aix‐Marseille Université, CNRS)Saint Paul‐Lez‐DuranceF‐13108France
| | - Laurent Nussaume
- Laboratoire de Biologie du Développement des Plantes, Commissariat à l'Énergie Atomique et aux Énergies AlternativesUMR7265 (CEA, Aix‐Marseille Université, CNRS)Saint Paul‐Lez‐DuranceF‐13108France
| | - Dong Liu
- Ministry of Education Key Laboratory of BioinformaticsCenter for Plant BiologySchool of Life SciencesTsinghua UniversityBeijing100084China
| | - Thierry Desnos
- Laboratoire de Biologie du Développement des Plantes, Commissariat à l'Énergie Atomique et aux Énergies AlternativesUMR7265 (CEA, Aix‐Marseille Université, CNRS)Saint Paul‐Lez‐DuranceF‐13108France
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19
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Wang H, Ji F, Zhang Y, Hou J, Liu W, Huang J, Liang W. Interactions between hydrogen sulphide and nitric oxide regulate two soybean citrate transporters during the alleviation of aluminium toxicity. PLANT, CELL & ENVIRONMENT 2019; 42:2340-2356. [PMID: 30938457 DOI: 10.1111/pce.13555] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 03/30/2019] [Indexed: 05/11/2023]
Abstract
Hydrogen sulphide (H2 S) is emerging as an important signalling molecule involved in plant resistance to various stresses. However, the underlying mechanism of H2 S in aluminium (Al) resistance and the crosstalk between H2 S and nitric oxide (NO) in Al stress signalling remain elusive. Citrate secretion is a wide-spread strategy for plants against Al toxicity. Here, two citrate transporter genes, GmMATE13 and GmMATE47, were identified and characterized in soybean. Functional analysis in Xenopus oocytes and transgenic Arabidopsis showed that GmMATE13 and GmMATE47 mediated citrate exudation and enhanced Al resistance. Al treatment triggered H2 S generation and citrate exudation in soybean roots. Pretreatment with an H2 S donor significantly elevated Al-induced citrate exudation, reduced Al accumulation in root tips, and alleviated Al-induced inhibition of root elongation, whereas application of an H2 S scavenger elicited the opposite effect. Furthermore, H2 S and NO mediated Al-induced GmMATE expression and plasma membrane (PM) H+ -ATPase activity and expression. Further investigation showed that NO induced H2 S production by regulating the key enzymes involved in biosynthesis and degradation of H2 S. These findings indicate that H2 S acts downstream of NO in mediating Al-induced citrate secretion through the upregulation of PM H+ -ATPase-coupled citrate transporter cotransport systems, thereby conferring plant resistance to Al toxicity.
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Affiliation(s)
- Huahua Wang
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Fang Ji
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Yangyang Zhang
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Junjie Hou
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Wenwen Liu
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Junjun Huang
- College of Life Sciences, Henan Normal University, Xinxiang, China
| | - Weihong Liang
- College of Life Sciences, Henan Normal University, Xinxiang, China
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20
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Wu L, Sadhukhan A, Kobayashi Y, Ogo N, Tokizawa M, Agrahari RK, Ito H, Iuchi S, Kobayashi M, Asai A, Koyama H. Involvement of phosphatidylinositol metabolism in aluminum-induced malate secretion in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:3329-3342. [PMID: 30977815 DOI: 10.1093/jxb/erz179] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 04/03/2019] [Indexed: 05/27/2023]
Abstract
To identify the upstream signaling of aluminum-induced malate secretion through aluminum-activated malate transporter 1 (AtALMT1), a pharmacological assay using inhibitors of human signal transduction pathways was performed. Early aluminum-induced transcription of AtALMT1 and other aluminum-responsive genes was significantly suppressed by phosphatidylinositol 4-kinase (PI4K) and phospholipase C (PLC) inhibitors, indicating that the PI4K-PLC metabolic pathway activates early aluminum signaling. Inhibitors of phosphatidylinositol 3-kinase (PI3K) and PI4K reduced aluminum-activated malate transport by AtALMT1, suggesting that both the PI3K and PI4K metabolic pathways regulate this process. These results were validated using T-DNA insertion mutants of PI4K and PI3K-RNAi lines. A human protein kinase inhibitor, putatively inhibiting homologous calcineurin B-like protein-interacting protein kinase and/or Ca-dependent protein kinase in Arabidopsis, suppressed late-phase aluminum-induced expression of AtALMT1, which was concomitant with the induction of an AtALMT1 repressor, WRKY46, and suppression of an AtALMT1 activator, Calmodulin-binding transcription activator 2 (CAMTA2). In addition, a human deubiquitinase inhibitor suppressed aluminum-activated malate transport, suggesting that deubiquitinases can regulate this process. We also found a reduction of aluminum-induced citrate secretion in tobacco by applying inhibitors of PI3K and PI4K. Taken together, our results indicated that phosphatidylinositol metabolism regulates organic acid secretion in plants under aluminum stress.
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Affiliation(s)
- Liujie Wu
- Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Ayan Sadhukhan
- Applied Biological Sciences, Gifu University, Gifu, Japan
| | | | - Naohisa Ogo
- Graduate Division of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | | | | | - Hiroki Ito
- Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Satoshi Iuchi
- Experimental Plant Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Masatomo Kobayashi
- Experimental Plant Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki, Japan
| | - Akira Asai
- Graduate Division of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
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21
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Kumar J, Choudhary AK, Gupta DS, Kumar S. Towards Exploitation of Adaptive Traits for Climate-Resilient Smart Pulses. Int J Mol Sci 2019; 20:E2971. [PMID: 31216660 PMCID: PMC6627977 DOI: 10.3390/ijms20122971] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/18/2019] [Accepted: 05/28/2019] [Indexed: 12/20/2022] Open
Abstract
Pulses are the main source of protein and minerals in the vegetarian diet. These are primarily cultivated on marginal lands with few inputs in several resource-poor countries of the world, including several in South Asia. Their cultivation in resource-scarce conditions exposes them to various abiotic and biotic stresses, leading to significant yield losses. Furthermore, climate change due to global warming has increased their vulnerability to emerging new insect pests and abiotic stresses that can become even more serious in the coming years. The changing climate scenario has made it more challenging to breed and develop climate-resilient smart pulses. Although pulses are climate smart, as they simultaneously adapt to and mitigate the effects of climate change, their narrow genetic diversity has always been a major constraint to their improvement for adaptability. However, existing genetic diversity still provides opportunities to exploit novel attributes for developing climate-resilient cultivars. The mining and exploitation of adaptive traits imparting tolerance/resistance to climate-smart pulses can be accelerated further by using cutting-edge approaches of biotechnology such as transgenics, genome editing, and epigenetics. This review discusses various classical and molecular approaches and strategies to exploit adaptive traits for breeding climate-smart pulses.
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Affiliation(s)
- Jitendra Kumar
- Indian Institute of Pulses Research, Kalyanpur, Kanpur 208 024, Uttar Pradesh, India.
| | | | - Debjyoti Sen Gupta
- Indian Institute of Pulses Research, Kalyanpur, Kanpur 208 024, Uttar Pradesh, India.
| | - Shiv Kumar
- Biodiversity and Integrated Gene Management Program, International Centre for Agricultural Research in the Dry Areas (ICARDA), P.O. Box 6299, Rabat-Institute, Rabat, Morocco.
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22
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Qiu W, Wang N, Dai J, Wang T, Kochian LV, Liu J, Zuo Y. AhFRDL1-mediated citrate secretion contributes to adaptation to iron deficiency and aluminum stress in peanuts. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:2873-2886. [PMID: 30825369 DOI: 10.1093/jxb/erz089] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/17/2019] [Indexed: 05/22/2023]
Abstract
Although citrate transporters are involved in iron (Fe) translocation and aluminum (Al) tolerance in plants, to date none of them have been shown to confer both biological functions in plant species that utilize Fe-absorption Strategy I. In this study, we demonstrated that AhFRDL1, a citrate transporter gene from peanut (Arachis hypogaea) that is induced by both Fe-deficiency and Al-stress, participates in both root-to-shoot Fe translocation and Al tolerance. Expression of AhFRDL1 induced by Fe deficiency was located in the root stele, but under Al-stress expression was observed across the entire root-tip cross-section. Overexpression of AhFRDL1 restored efficient Fe translocation in Atfrd3 mutants and Al resistance in AtMATE-knockout mutants. Knocking down AhFRDL1 in the roots resulted in reduced xylem citrate and reduced concentrations of active Fe in young leaves. Furthermore, AhFRDL1-knockdown lines had reduced root citrate exudation and were more sensitive to Al toxicity. Compared to an Al-sensitive variety, enhanced AhFRDL1 expression in an Fe-efficient variety contributed to higher levels of Al tolerance and Fe translocation by promoting citrate secretion. These results indicate that AhFRDL1 plays a significant role in Fe translocation and Al tolerance in Fe-efficient peanut varieties under different soil-stress conditions. Given its dual biological functions, AhFRDL1 may serve as a useful genetic marker for breeding for high Fe efficiency and Al tolerance.
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Affiliation(s)
- Wei Qiu
- Key Laboratory of Plant-Soil Interactions, MOE, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Nanqi Wang
- Key Laboratory of Plant-Soil Interactions, MOE, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Jing Dai
- Key Laboratory of Plant-Soil Interactions, MOE, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Tianqi Wang
- Key Laboratory of Plant-Soil Interactions, MOE, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
| | - Leon V Kochian
- Robert W. Holley Center, US Department of Agriculture-Agricultural Research Service, Ithaca, NY, USA
| | - Jiping Liu
- Robert W. Holley Center, US Department of Agriculture-Agricultural Research Service, Ithaca, NY, USA
| | - Yuanmei Zuo
- Key Laboratory of Plant-Soil Interactions, MOE, College of Resources and Environmental Sciences, China Agricultural University, Beijing, China
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23
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Molecular Mechanisms for Coping with Al Toxicity in Plants. Int J Mol Sci 2019; 20:ijms20071551. [PMID: 30925682 PMCID: PMC6480313 DOI: 10.3390/ijms20071551] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 03/25/2019] [Accepted: 03/25/2019] [Indexed: 01/03/2023] Open
Abstract
Aluminum (Al) toxicity is one of the major constraints to agricultural production in acid soils. Molecular mechanisms of coping with Al toxicity have now been investigated in a range of plant species. Two main mechanisms of Al tolerance in plants are Al exclusion from the roots and the ability to tolerate Al in the roots. This review focuses on the recent discovery of novel genes and mechanisms that confer Al tolerance in plants and summarizes our understanding of the physiological, genetic, and molecular basis for plant Al tolerance. We hope this review will provide a theoretical basis for the genetic improvement of Al tolerance in plants.
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24
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Daspute AA, Yunxuan X, Gu M, Kobayashi Y, Wagh S, Panche A, Koyama H. Agrobacterium rhizogenes-mediated hairy roots transformation as a tool for exploring aluminum-responsive genes function. Future Sci OA 2019; 5:FSO364. [PMID: 30906565 PMCID: PMC6426172 DOI: 10.4155/fsoa-2018-0065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 11/21/2018] [Indexed: 11/25/2022] Open
Abstract
AIM To develop a useful alternative approach to evaluate the gene function in hairy roots. METHODS Arabidopsis and tobacco (wild-type or mutant) were a host for Agrobacterium rhizogenes transformation. RESULTS The hairy roots formation efficiency ranged from 53 to 98% in tobacco and 53 to 66% in Arabidopsis. Hairy and intact roots showed similar gene expression pattern in response to salt and aluminum stress. Genomic polymerase chain reaction and fluorescent images showed high rate (>80%) of co-integration of T-DNAs and uniform cell transformation without use of any antibiotic selection. Whole processes of hairy roots were completed within 1 month after the infection of Agrobacterium. CONCLUSION Aluminum-responsive orthologous gene function could be evaluated by NtSTOP1-KD and Atstop1 as a host for hairy roots transformation.
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Affiliation(s)
- Abhijit A Daspute
- Laboratory of Plant Cell Technology, Faculty of Applied Biological Sciences, Gifu University, Gifu 501–1193, Japan
- Institute of Bioscience & Biotechnology, Department of Biological Sciences, MGM College, Aurangabad 411-003, India
| | - Xian Yunxuan
- Laboratory of Plant Cell Technology, Faculty of Applied Biological Sciences, Gifu University, Gifu 501–1193, Japan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, Guangxi Universities, Nanning 530-005, China
| | - Minghua Gu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, Guangxi Universities, Nanning 530-005, China
| | - Yuriko Kobayashi
- Laboratory of Plant Cell Technology, Faculty of Applied Biological Sciences, Gifu University, Gifu 501–1193, Japan
| | - Sopan Wagh
- Institute of Bioscience & Biotechnology, Department of Biological Sciences, MGM College, Aurangabad 411-003, India
| | - Archana Panche
- Institute of Bioscience & Biotechnology, Department of Biological Sciences, MGM College, Aurangabad 411-003, India
| | - Hiroyuki Koyama
- Laboratory of Plant Cell Technology, Faculty of Applied Biological Sciences, Gifu University, Gifu 501–1193, Japan
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25
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Pereira JF, Ryan PR. The role of transposable elements in the evolution of aluminium resistance in plants. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:41-54. [PMID: 30325439 DOI: 10.1093/jxb/ery357] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 10/02/2018] [Indexed: 05/20/2023]
Abstract
Aluminium (Al) toxicity can severely reduce root growth and consequently affect plant development and yield. A mechanism by which many species resist the toxic effects of Al relies on the efflux of organic anions (OAs) from the root apices via OA transporters. Several of the genes encoding these OA transporters contain transposable elements (TEs) in the coding sequences or in flanking regions. Some of the TE-induced mutations impact Al resistance by modifying the level and/or location of gene expression so that OA efflux from the roots is increased. The importance of genomic modifications for improving the adaptation of plants to acid soils has been raised previously, but the growing number of examples linking TEs with these changes requires highlighting. Here, we review the role of TEs in creating genetic modifications that enhance the adaptation of plants to acid soils by increasing the release of OAs from the root apices. We argue that TEs have been an important source of beneficial mutations that have co-opted OA transporter proteins with other functions to perform this role. These changes have occurred relatively recently in the evolution of many species and likely facilitated their expansion into regions with acidic soils.
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Affiliation(s)
| | - Peter R Ryan
- CSIRO Agriculture and Food, Canberra, ACT, Australia
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26
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Gao J, Yan S, Yu H, Zhan M, Guan K, Wang Y, Yang Z. Sweet sorghum (Sorghum bicolor L.) SbSTOP1 activates the transcription of a β-1,3-glucanase gene to reduce callose deposition under Al toxicity: A novel pathway for Al tolerance in plants. Biosci Biotechnol Biochem 2018; 83:446-455. [PMID: 30387379 DOI: 10.1080/09168451.2018.1540290] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Aluminum (Al) toxicity is a primary limiting factor for crop production in acid soils. Callose deposition, an early indicator and likely a contributor to Al toxicity, is induced rapidly in plant roots under Al stress. SbGlu1, encoding a β-1,3-glucanase for callose degradation, showed important roles in sorghum Al resistance, yet its regulatory mechanisms remain unclear. The STOP1 transcription factors mediate Al signal transduction in various plants. Here, we identified their homolog in sweet sorghum, SbSTOP1, transcriptionally activated the expression of SbGlu1. Moreover, the DNA sequence recognized by SbSTOP1 on the promoter of SbGlu1 lacked the reported cis-acting element. Complementation lines of Atstop1 with SbSTOP1 revealed enhanced transcription levels of SbGlu1 homologous gene and reduced callose accumulation in Arabidopsis. These results indicate, for the first time, that SbSTOP1 is involved in the modulation of callose deposition under Al stress via transcriptional regulation of a β-1,3-glucanase gene.
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Affiliation(s)
- Jie Gao
- a Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science , Jilin University , Changchun , China.,b College of Biological and Agricultural Engineering , Jilin University , Changchun , China
| | - Siqi Yan
- a Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science , Jilin University , Changchun , China
| | - Haiye Yu
- b College of Biological and Agricultural Engineering , Jilin University , Changchun , China
| | - Meiqi Zhan
- a Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science , Jilin University , Changchun , China
| | - Kexing Guan
- a Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science , Jilin University , Changchun , China
| | - Yanqiu Wang
- a Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science , Jilin University , Changchun , China
| | - Zhenming Yang
- a Jilin Province Engineering Laboratory of Plant Genetic Improvement, College of Plant Science , Jilin University , Changchun , China
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27
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Che J, Tsutsui T, Yokosho K, Yamaji N, Ma JF. Functional characterization of an aluminum (Al)-inducible transcription factor, ART2, revealed a different pathway for Al tolerance in rice. THE NEW PHYTOLOGIST 2018; 220:209-218. [PMID: 29888411 DOI: 10.1111/nph.15252] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Accepted: 05/09/2018] [Indexed: 06/08/2023]
Abstract
High aluminum (Al) tolerance in rice (Oryza sativa) is controlled by a Cys2His2-type zinc finger transcription factor ART1 (Al resistance transcription factor 1). There are five close homologs of ART1 in the rice genome, but the role of these homologs is unknown. We functionally characterized one of the ART1 homologs, ART2, in terms of tissue and spatial expression, subcellular localization, transcriptional activation activity, and phenotypic analysis of the knockout lines. ART2 was localized to the nucleus and showed a transcriptional activation potential in yeast. ART2 was mainly expressed in the roots, but the expression level was much lower than that of ART1. The ART2 expression was rapidly induced by Al in the roots of the wild-type rice, but not in art1 mutant. Knockout of ART2 resulted in increased sensitivity to Al toxicity, but did not alter sensitivity to different pH values. Expression profile analysis by RNA-sequencing showed that ART2 was not involved in activation of genes regulated by ART1; however, four genes seems to be regulated by ART2, which are implicated in Al tolerance. These results indicate that ART1 and ART2 regulate different pathways leading to Al tolerance, and ATR2 plays a supplementary role in Al tolerance in rice.
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Affiliation(s)
- Jing Che
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan
| | - Tomokazu Tsutsui
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan
| | - Kengo Yokosho
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan
| | - Naoki Yamaji
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan
| | - Jian Feng Ma
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan
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