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Fan W, Xu JM, Lou HQ, Xiao C, Chen WW, Yang JL. Physiological and Molecular Analysis of Aluminium-Induced Organic Acid Anion Secretion from Grain Amaranth (Amaranthus hypochondriacus L.) Roots. Int J Mol Sci 2016; 17:ijms17050608. [PMID: 27144562 PMCID: PMC4881440 DOI: 10.3390/ijms17050608] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 04/05/2016] [Accepted: 04/08/2016] [Indexed: 11/30/2022] Open
Abstract
Grain amaranth (Amaranthus hypochondriacus L.) is abundant in oxalate and can secrete oxalate under aluminium (Al) stress. However, the features of Al-induced secretion of organic acid anions (OA) and potential genes responsible for OA secretion are poorly understood. Here, Al-induced OA secretion in grain amaranth roots was characterized by ion charomatography and enzymology methods, and suppression subtractive hybridization (SSH) together with quantitative real-time PCR (qRT-PCR) was used to identify up-regulated genes that are potentially involved in OA secretion. The results showed that grain amaranth roots secrete both oxalate and citrate in response to Al stress. The secretion pattern, however, differs between oxalate and citrate. Neither lanthanum chloride (La) nor cadmium chloride (Cd) induced OA secretion. A total of 84 genes were identified as up-regulated by Al, in which six genes were considered as being potentially involved in OA secretion. The expression pattern of a gene belonging to multidrug and toxic compound extrusion (MATE) family, AhMATE1, was in close agreement with that of citrate secretion. The expression of a gene encoding tonoplast dicarboxylate transporter and four genes encoding ATP-binding cassette transporters was differentially regulated by Al stress, but the expression pattern was not correlated well with that of oxalate secretion. Our results not only reveal the secretion pattern of oxalate and citrate from grain amaranth roots under Al stress, but also provide some genetic information that will be useful for further characterization of genes involved in Al toxicity and tolerance mechanisms.
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Affiliation(s)
- Wei Fan
- College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China.
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Jia-Meng Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China.
| | - He-Qiang Lou
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Chuan Xiao
- Institute of Resource Biology and Biotechnology, Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
| | - Wei-Wei Chen
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China.
| | - Jian-Li Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China.
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Liu M, Xu J, Lou H, Fan W, Yang J, Zheng S. Characterization of VuMATE1 Expression in Response to Iron Nutrition and Aluminum Stress Reveals Adaptation of Rice Bean (Vigna umbellata) to Acid Soils through Cis Regulation. FRONTIERS IN PLANT SCIENCE 2016; 7:511. [PMID: 27148333 PMCID: PMC4835453 DOI: 10.3389/fpls.2016.00511] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Accepted: 03/31/2016] [Indexed: 05/06/2023]
Abstract
Rice bean (Vigna umbellata) VuMATE1 appears to be constitutively expressed at vascular system but root apex, and Al stress extends its expression to root apex. Whether VuMATE1 participates in both Al tolerance and Fe nutrition, and how VuMATE1 expression is regulated is of great interest. In this study, the role of VuMATE1 in Fe nutrition was characterized through in planta complementation assays. The transcriptional regulation of VuMATE1 was investigated through promoter analysis and promoter-GUS reporter assays. The results showed that the expression of VuMATE1 was regulated by Al stress but not Fe status. Complementation of frd3-1 with VuMATE1 under VuMATE1 promoter could not restore phenotype, but restored with 35SCaMV promoter. Immunostaining of VuMATE1 revealed abnormal localization of VuMATE1 in vasculature. In planta GUS reporter assay identified Al-responsive cis-acting elements resided between -1228 and -574 bp. Promoter analysis revealed several cis-acting elements, but transcription is not simply regulated by one of these elements. We demonstrated that cis regulation of VuMATE1 expression is involved in Al tolerance mechanism, while not involved in Fe nutrition. These results reveal the evolution of VuMATE1 expression for better adaptation of rice bean to acid soils where Al stress imposed but Fe deficiency pressure released.
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Affiliation(s)
- Meiya Liu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang UniversityHangzhou, China
- Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural SciencesHangzhou, China
| | - Jiameng Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang UniversityHangzhou, China
| | - Heqiang Lou
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang UniversityHangzhou, China
| | - Wei Fan
- College of Resources and Environment, Yunnan Agricultural UniversityKunming, China
- *Correspondence: Jianli Yang, ; Wei Fan,
| | - Jianli Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang UniversityHangzhou, China
- *Correspondence: Jianli Yang, ; Wei Fan,
| | - Shaojian Zheng
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang UniversityHangzhou, China
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Maurino VG, Engqvist MKM. 2-Hydroxy Acids in Plant Metabolism. THE ARABIDOPSIS BOOK 2015; 13:e0182. [PMID: 26380567 PMCID: PMC4568905 DOI: 10.1199/tab.0182] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Glycolate, malate, lactate, and 2-hydroxyglutarate are important 2-hydroxy acids (2HA) in plant metabolism. Most of them can be found as D- and L-stereoisomers. These 2HA play an integral role in plant primary metabolism, where they are involved in fundamental pathways such as photorespiration, tricarboxylic acid cycle, glyoxylate cycle, methylglyoxal pathway, and lysine catabolism. Recent molecular studies in Arabidopsis thaliana have helped elucidate the participation of these 2HA in in plant metabolism and physiology. In this chapter, we summarize the current knowledge about the metabolic pathways and cellular processes in which they are involved, focusing on the proteins that participate in their metabolism and cellular/intracellular transport in Arabidopsis.
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Affiliation(s)
- Veronica G. Maurino
- institute of Developmental and Molecular Biology of Plants, Plant Molecular Physiology and Biotechnology Group, Heinrich Heine University, Universitätsstraße 1, and Cluster of Excellence on Plant Sciences (CEPLAS), 40225 Düsseldorf, Germany
| | - Martin K. M. Engqvist
- institute of Developmental and Molecular Biology of Plants, Plant Molecular Physiology and Biotechnology Group, Heinrich Heine University, Universitätsstraße 1, and Cluster of Excellence on Plant Sciences (CEPLAS), 40225 Düsseldorf, Germany
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54
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Tokizawa M, Kobayashi Y, Saito T, Kobayashi M, Iuchi S, Nomoto M, Tada Y, Yamamoto YY, Koyama H. SENSITIVE TO PROTON RHIZOTOXICITY1, CALMODULIN BINDING TRANSCRIPTION ACTIVATOR2, and other transcription factors are involved in ALUMINUM-ACTIVATED MALATE TRANSPORTER1 expression. PLANT PHYSIOLOGY 2015; 167:991-1003. [PMID: 25627216 PMCID: PMC4348791 DOI: 10.1104/pp.114.256552] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 01/22/2015] [Indexed: 05/18/2023]
Abstract
In Arabidopsis (Arabidopsis thaliana) the root apex is protected from aluminum (Al) rhizotoxicity by excretion of malate, an Al chelator, by ALUMINUM-ACTIVATED MALATE TRANSPORTER1 (AtALMT1). AtALMT1 expression is fundamentally regulated by the SENSITIVE TO PROTON RHIZOTOXICITY1 (STOP1) zinc finger protein, but other transcription factors have roles that enable Al-inducible expression with a broad dynamic range. In this study, we characterized multiple cis-elements in the AtALMT1 promoter that interact with transcription factors. In planta complementation assays of AtALMT1 driven by 5' truncated promoters of different lengths showed that the promoter region between -540 and 0 (the first ATG) restored the Al-sensitive phenotype of atalm1 and thus contains cis-elements essential for AtALMT1 expression for Al tolerance. Computation of overrepresented octamers showed that eight regions in this promoter region contained potential cis-elements involved in Al induction and STOP1 regulation. Mutation in a position around -297 from the first ATG completely inactivated AtALMT1 expression and Al response. In vitro binding assays showed that this region contained the STOP1 binding site, which accounted for the recognition by four zinc finger domains of the protein. Other positions were characterized as cis-elements that regulated expression by repressors and activators and a transcription factor that determines root tip expression of AtALMT1. From the consensus of known cis-elements, we identified CALMODULIN-BINDING TRANSCRIPTION ACTIVATOR2 to be an activator of AtALMT1 expression. Al-inducible expression of AtALMT1 changed transcription starting sites, which increased the abundance of transcripts with a shortened 5' untranslated region. The present analyses identified multiple mechanisms that regulate AtALMT1 expression.
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Affiliation(s)
- Mutsutomo Tokizawa
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan (M.T., Y.K., T.S., Y.Y.Y., H.K.);RIKEN BioResource Center, Ibaraki 305-0074, Japan (M.K., S.I.); andDivision of Biological Science, Graduate School of Science (M.N.), and The Center for Gene Research, Division of Biological Science (Y.T.), Nagoya University, Aichi 464-8602, Japan
| | - Yuriko Kobayashi
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan (M.T., Y.K., T.S., Y.Y.Y., H.K.);RIKEN BioResource Center, Ibaraki 305-0074, Japan (M.K., S.I.); andDivision of Biological Science, Graduate School of Science (M.N.), and The Center for Gene Research, Division of Biological Science (Y.T.), Nagoya University, Aichi 464-8602, Japan
| | - Tatsunori Saito
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan (M.T., Y.K., T.S., Y.Y.Y., H.K.);RIKEN BioResource Center, Ibaraki 305-0074, Japan (M.K., S.I.); andDivision of Biological Science, Graduate School of Science (M.N.), and The Center for Gene Research, Division of Biological Science (Y.T.), Nagoya University, Aichi 464-8602, Japan
| | - Masatomo Kobayashi
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan (M.T., Y.K., T.S., Y.Y.Y., H.K.);RIKEN BioResource Center, Ibaraki 305-0074, Japan (M.K., S.I.); andDivision of Biological Science, Graduate School of Science (M.N.), and The Center for Gene Research, Division of Biological Science (Y.T.), Nagoya University, Aichi 464-8602, Japan
| | - Satoshi Iuchi
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan (M.T., Y.K., T.S., Y.Y.Y., H.K.);RIKEN BioResource Center, Ibaraki 305-0074, Japan (M.K., S.I.); andDivision of Biological Science, Graduate School of Science (M.N.), and The Center for Gene Research, Division of Biological Science (Y.T.), Nagoya University, Aichi 464-8602, Japan
| | - Mika Nomoto
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan (M.T., Y.K., T.S., Y.Y.Y., H.K.);RIKEN BioResource Center, Ibaraki 305-0074, Japan (M.K., S.I.); andDivision of Biological Science, Graduate School of Science (M.N.), and The Center for Gene Research, Division of Biological Science (Y.T.), Nagoya University, Aichi 464-8602, Japan
| | - Yasuomi Tada
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan (M.T., Y.K., T.S., Y.Y.Y., H.K.);RIKEN BioResource Center, Ibaraki 305-0074, Japan (M.K., S.I.); andDivision of Biological Science, Graduate School of Science (M.N.), and The Center for Gene Research, Division of Biological Science (Y.T.), Nagoya University, Aichi 464-8602, Japan
| | - Yoshiharu Y Yamamoto
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan (M.T., Y.K., T.S., Y.Y.Y., H.K.);RIKEN BioResource Center, Ibaraki 305-0074, Japan (M.K., S.I.); andDivision of Biological Science, Graduate School of Science (M.N.), and The Center for Gene Research, Division of Biological Science (Y.T.), Nagoya University, Aichi 464-8602, Japan
| | - Hiroyuki Koyama
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan (M.T., Y.K., T.S., Y.Y.Y., H.K.);RIKEN BioResource Center, Ibaraki 305-0074, Japan (M.K., S.I.); andDivision of Biological Science, Graduate School of Science (M.N.), and The Center for Gene Research, Division of Biological Science (Y.T.), Nagoya University, Aichi 464-8602, Japan
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Aluminum-Induced Inhibition of Root Growth: Roles of Cell Wall Assembly, Structure, and Function. ALUMINUM STRESS ADAPTATION IN PLANTS 2015. [DOI: 10.1007/978-3-319-19968-9_13] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Wu X, Li R, Shi J, Wang J, Sun Q, Zhang H, Xing Y, Qi Y, Zhang N, Guo YD. Brassica oleracea MATE encodes a citrate transporter and enhances aluminum tolerance in Arabidopsis thaliana. PLANT & CELL PHYSIOLOGY 2014; 55:1426-36. [PMID: 24850836 DOI: 10.1093/pcp/pcu067] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The secretion of organic acid anions from roots is an important mechanism for plant aluminum (Al) tolerance. Here we report cloning and characterizing BoMATE (KF031944), a multidrug and toxic compound extrusion (MATE) family gene from cabbage (Brassica oleracea). The expression of BoMATE was more abundant in roots than in shoots, and it was highly induced by Al treatment. The (14)C-citrate efflux experiments in oocytes demonstrated that BoMATE is a citrate transporter. Electrophysiological analysis and SIET analysis of Xenopus oocytes expressing BoMATE indicated BoMATE is activated by Al. Transient expression of BoMATE in onion epidermal cells demonstrated that it localized to the plasma membrane. Compared with the wild-type Arabidopsis, the transgenic lines constitutively overexpressing BoMATE enhanced Al tolerance and increased citrate secretion. In addition, Arabidopsis transgenic lines had a lower K(+) efflux and higher H(+) efflux, in the presence of Al, than control wild type in the distal elongation zone (DEZ). This is the first direct evidence that MATE protein is involved in the K(+) and H(+) flux in response to Al treatment. Taken together, our results show that BoMATE is an Al-induced citrate transporter and enhances aluminum tolerance in Arabidopsis thaliana.
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Affiliation(s)
- Xinxin Wu
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work
| | - Ren Li
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work
| | - Jin Shi
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work
| | - Jinfang Wang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work
| | - Qianqian Sun
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work
| | - Haijun Zhang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work
| | - Yanxia Xing
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work
| | - Yan Qi
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work
| | - Na Zhang
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work
| | - Yang-Dong Guo
- College of Agriculture and Biotechnology, China Agricultural University, Beijing 100193, People's Republic of ChinaThe first two authors contributed equally to this work.
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57
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Yang ZB, Geng X, He C, Zhang F, Wang R, Horst WJ, Ding Z. TAA1-regulated local auxin biosynthesis in the root-apex transition zone mediates the aluminum-induced inhibition of root growth in Arabidopsis. THE PLANT CELL 2014; 26:2889-904. [PMID: 25052716 PMCID: PMC4145121 DOI: 10.1105/tpc.114.127993] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 06/18/2014] [Accepted: 06/28/2014] [Indexed: 05/02/2023]
Abstract
The transition zone (TZ) of the root apex is the perception site of Al toxicity. Here, we show that exposure of Arabidopsis thaliana roots to Al induces a localized enhancement of auxin signaling in the root-apex TZ that is dependent on TAA1, which encodes a Trp aminotransferase and regulates auxin biosynthesis. TAA1 is specifically upregulated in the root-apex TZ in response to Al treatment, thus mediating local auxin biosynthesis and inhibition of root growth. The TAA1-regulated local auxin biosynthesis in the root-apex TZ in response to Al stress is dependent on ethylene, as revealed by manipulating ethylene homeostasis via the precursor of ethylene biosynthesis 1-aminocyclopropane-1-carboxylic acid, the inhibitor of ethylene biosynthesis aminoethoxyvinylglycine, or mutant analysis. In response to Al stress, ethylene signaling locally upregulates TAA1 expression and thus auxin responses in the TZ and results in auxin-regulated root growth inhibition through a number of auxin response factors (ARFs). In particular, ARF10 and ARF16 are important in the regulation of cell wall modification-related genes. Our study suggests a mechanism underlying how environmental cues affect root growth plasticity through influencing local auxin biosynthesis and signaling.
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Affiliation(s)
- Zhong-Bao Yang
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Science, Shandong University, Jinan 250100, People's Republic of China
| | - Xiaoyu Geng
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Science, Shandong University, Jinan 250100, People's Republic of China
| | - Chunmei He
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Science, Shandong University, Jinan 250100, People's Republic of China
| | - Feng Zhang
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Science, Shandong University, Jinan 250100, People's Republic of China
| | - Rong Wang
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Science, Shandong University, Jinan 250100, People's Republic of China
| | - Walter J Horst
- Institute of Plant Nutrition, Leibniz Universität Hannover, 30419 Hannover, Germany
| | - Zhaojun Ding
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, College of Life Science, Shandong University, Jinan 250100, People's Republic of China
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58
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Zhang Y, He Q, Zhao S, Huang L, Hao L. Arabidopsis ein2-1 and npr1-1 response to Al stress. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2014; 93:78-83. [PMID: 24619362 DOI: 10.1007/s00128-014-1249-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Accepted: 03/03/2014] [Indexed: 06/03/2023]
Abstract
An enhanced Al(3+) tolerance has been observed in ethylene insensitive mutant ein2-1 and salicylic acid insensitive mutant npr1-1 of Arabidopsis. However, we found that the tolerant phenotype of ein2-1 and npr1-1 under Al stress was dependent on NPR and EIN function, respectively, because the double mutant ein2-1/npr1-1 displayed more sensitive to Al stress than wild-type plants. We analysed the differential performance between ein2-1/npr1-1 and their respective single mutant in response to Al stress, and found that antioxidant defence rather than malate exudation was the determinant factor.
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Affiliation(s)
- Yiyan Zhang
- College of Chemistry and Life Sciences, Shenyang Normal University, Shenyang, 110034, People's Republic of China
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59
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Zhou G, Pereira JF, Delhaize E, Zhou M, Magalhaes JV, Ryan PR. Enhancing the aluminium tolerance of barley by expressing the citrate transporter genes SbMATE and FRD3. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:2381-90. [PMID: 24692647 PMCID: PMC4036506 DOI: 10.1093/jxb/eru121] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Malate and citrate efflux from root apices is a mechanism of Al(3+) tolerance in many plant species. Citrate efflux is facilitated by members of the MATE (multidrug and toxic compound exudation) family localized to the plasma membrane of root cells. Barley (Hordeum vulgare) is among the most Al(3+)-sensitive cereal species but the small genotypic variation in tolerance that is present is correlated with citrate efflux via a MATE transporter named HvAACT1. This study used a biotechnological approach to increase the Al(3+) tolerance of barley by transforming it with two MATE genes that encode citrate transporters: SbMATE is the major Al(3+)-tolerance gene from sorghum whereas FRD3 is involved with Fe nutrition in Arabidopsis. Independent transgenic and null T3 lines were generated for both transgenes. Lines expressing SbMATE showed Al(3+)-activated citrate efflux from root apices and greater tolerance to Al(3+) toxicity than nulls in hydroponic and short-term soil trials. Transgenic lines expressing FRD3 exhibited similar phenotypes except citrate release from roots occurred constitutively. The Al(3+) tolerance of these lines was compared with previously generated transgenic barley lines overexpressing the endogenous HvAACT1 gene and the TaALMT1 gene from wheat. Barley lines expressing TaALMT1 showed significantly greater Al(3+) tolerance than all lines expressing MATE genes. This study highlights the relative efficacy of different organic anion transport proteins for increasing the Al(3+) tolerance of an important crop species.
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Affiliation(s)
- Gaofeng Zhou
- Tasmanian Institute of Agriculture, University of Tasmania, PO Box 46, Kings Meadows, TAS 7249, Australia CSIRO Plant Industry, GPO Box 1600, Canberra, ACT 2601, Australia
| | - Jorge F Pereira
- Embrapa Wheat, Rodovia BR 285 km 294, CEP 99001-970, Passo Fundo, RS, Brazil
| | | | - Meixue Zhou
- Tasmanian Institute of Agriculture, University of Tasmania, PO Box 46, Kings Meadows, TAS 7249, Australia
| | - Jurandir V Magalhaes
- Embrapa Maize and Sorghum, Rod. MG 424, Km 65, 35701-970, Sete Lagoas, Minas Gerais, Brazil
| | - Peter R Ryan
- CSIRO Plant Industry, GPO Box 1600, Canberra, ACT 2601, Australia
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60
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Kobayashi Y, Lakshmanan V, Kobayashi Y, Asai M, Iuchi S, Kobayashi M, Bais HP, Koyama H. Overexpression of AtALMT1 in the Arabidopsis thaliana ecotype Columbia results in enhanced Al-activated malate excretion and beneficial bacterium recruitment. PLANT SIGNALING & BEHAVIOR 2013; 8:25565. [PMID: 23857348 PMCID: PMC4002621 DOI: 10.4161/psb.25565] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 06/26/2013] [Accepted: 06/27/2013] [Indexed: 05/24/2023]
Abstract
AtALMT1 (Arabidopsis thaliana ALuminum activated Malate Transporter 1) encodes an Arabidopsis thaliana malate transporter that has a pleiotropic role in Arabidopsis stress tolerance. Malate released through AtALMT1 protects the root tip from Al rhizotoxicity, and recruits beneficial rhizobacteria that induce plant immunity. To examine whether the overexpression of AtALMT1 can improve these traits, the gene, driven by the cauliflower mosaic virus 35S promoter, was introduced into the Arabidopsis ecotype Columbia. Overexpression of the gene enhanced both Al-activated malate excretion and the recruitment of beneficial bacteria Bacillus subtilis strain FB17. These findings suggest that overexpression of AtALMT1 can be used as an approach to enhance a plant's ability to release malate into the rhizosphere, which can enhance plant tolerance to some environmental stress factors.
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Affiliation(s)
- Yasufumi Kobayashi
- Laboratory of Plant Cell Technology; Faculty of Applied Biological Sciences; Gifu University; Gifu, Japan
| | - Venkatachalam Lakshmanan
- Department of Plant and Soil Sciences; Delaware Biotechnology Institute; University of Delaware; Newark, DE USA
| | - Yuriko Kobayashi
- Laboratory of Plant Cell Technology; Faculty of Applied Biological Sciences; Gifu University; Gifu, Japan
| | - Minatsu Asai
- Laboratory of Plant Cell Technology; Faculty of Applied Biological Sciences; Gifu University; Gifu, Japan
| | - Satoshi Iuchi
- Experimental Plant Division; RIKEN-BRC; Tsukuba; Ibaraki, Japan
| | | | - Harsh P. Bais
- Department of Plant and Soil Sciences; Delaware Biotechnology Institute; University of Delaware; Newark, DE USA
| | - Hiroyuki Koyama
- Laboratory of Plant Cell Technology; Faculty of Applied Biological Sciences; Gifu University; Gifu, Japan
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