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Gao P, Han R, Xu H, Wei Y, Yu Y. Identification of MATE Family and Characterization of GmMATE13 and GmMATE75 in Soybean's Response to Aluminum Stress. Int J Mol Sci 2024; 25:3711. [PMID: 38612522 PMCID: PMC11011378 DOI: 10.3390/ijms25073711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/22/2024] [Accepted: 03/23/2024] [Indexed: 04/14/2024] Open
Abstract
The multidrug and toxic compound extrusion (MATE) proteins are coding by a secondary transporter gene family, and have been identified to participate in the modulation of organic acid exudation for aluminum (Al) resistance. The soybean variety Glycine max "Tamba" (TBS) exhibits high Al tolerance. The expression patterns of MATE genes in response to Al stress in TBS and their specific functions in the context of Al stress remain elusive. In this study, 124 MATE genes were identified from the soybean genome. The RNA-Seq results revealed significant upregulation of GmMATE13 and GmMATE75 in TBS upon exposure to high-dose Al3+ treatment and both genes demonstrated sequence homology to citrate transporters of other plants. Subcellular localization showed that both proteins were located in the cell membrane. Transgenic complementation experiments of Arabidopsis mutants, atmate, with GmMATE13 or GmMATE75 genes enhanced the Al tolerance of the plant due to citrate secretion. Taken together, this study identified GmMATE13 and GmMATE75 as citrate transporter genes in TBS, which could improve citrate secretion and enhance Al tolerance. Our findings provide genetic resources for the development of plant varieties that are resistant to Al toxicity.
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Affiliation(s)
- Pengxiang Gao
- Center for Plant Environmental Sensing, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China;
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Rongrong Han
- College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (R.H.); (H.X.); (Y.Y.)
| | - Hui Xu
- College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (R.H.); (H.X.); (Y.Y.)
| | - Yunmin Wei
- Center for Plant Environmental Sensing, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China;
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (R.H.); (H.X.); (Y.Y.)
| | - Yongxiong Yu
- College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (R.H.); (H.X.); (Y.Y.)
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Aizawa T, Sato J, Saito S, Yasuda T, Maruyama Y, Urai M. An extracellular polysaccharide is involved in the aluminum tolerance of Pullulanibacillus sp. CA42, a newly isolated strain from the Chinese water chestnut growing in an actual acid sulfate soil area in Vietnam. Front Microbiol 2023; 14:1241244. [PMID: 37700869 PMCID: PMC10493610 DOI: 10.3389/fmicb.2023.1241244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 08/15/2023] [Indexed: 09/14/2023] Open
Abstract
A novel aluminum-tolerant bacterial strain CA42 was isolated from the aquatic plant Eleocharis dulcis, which grows in a highly acidic swamp in Vietnam. Inoculation with CA42 allowed Oryza sativa to grow in the presence of 300 μM AlCl3 at pH 3.5, and biofilms were observed around the roots. Using 16S rRNA gene sequencing analysis, the strain was identified as Pullulanibacillus sp. CA42. This strain secreted large amounts of an extracellular polysaccharide (CA42 EPS). Results from structural analyses on CA42 EPS, namely methylation analysis and nuclear magnetic resonance (NMR), indicated that the chemical structure of CA42 EPS was a glycogen-like α-glucan. Purified CA42 EPS and the commercially available oyster glycogen adsorbed aluminum ions up to 15-30 μmol/g dry weight. Digestion treatments with α-amylase and pullulanase completely attenuated the aluminum ion-adsorbing activity of purified CA42 EPS and oyster glycogen, suggesting that the glycogen-like structure adsorbed aluminum ions and that its branching structure played an important role in its aluminum adsorbing activity. Furthermore, the aluminum tolerance of CA42 cells was attenuated by pullulanase treatment directly on the live CA42 cells. These results suggest that CA42 EPS adsorbs aluminum ions and is involved in the aluminum tolerance mechanism of Pullulanibacillus sp. CA42. Thus, this strain may be a potential plant growth-promoting bacterium in acidic soils. In addition, this study is the first to report a glycogen-like polysaccharide that adsorbs aluminum ions.
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Affiliation(s)
- Tomoko Aizawa
- Department of Bioscience, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan
| | - Junki Sato
- Department of Applied Biological Sciences, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan
| | - Shimon Saito
- Department of Applied Biological Sciences, College of Bioresource Sciences, Nihon University, Fujisawa, Kanagawa, Japan
| | - Takanari Yasuda
- Department of Chemistry for Life Sciences and Agriculture, Faculty of Life Sciences, Tokyo University of Agriculture, Tokyo, Japan
| | - Yutaro Maruyama
- Department of Chemistry for Life Sciences and Agriculture, Faculty of Life Sciences, Tokyo University of Agriculture, Tokyo, Japan
| | - Makoto Urai
- Department of Chemistry for Life Sciences and Agriculture, Faculty of Life Sciences, Tokyo University of Agriculture, Tokyo, Japan
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Belimov AA, Shaposhnikov AI, Azarova TS, Yuzikhin OS, Sekste EA, Safronova VI, Tikhonovich IA. Aluminum-Immobilizing Rhizobacteria Modulate Root Exudation and Nutrient Uptake and Increase Aluminum Tolerance of Pea Mutant E107 ( brz). Plants (Basel) 2023; 12:2334. [PMID: 37375958 DOI: 10.3390/plants12122334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 06/11/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023]
Abstract
It is well known that plant-growth-promoting rhizobacteria (PGPRs) increase the tolerance of plants to abiotic stresses; however, the counteraction of Al toxicity has received little attention. The effects of specially selected Al-tolerant and Al-immobilizing microorganisms were investigated using pea cultivar Sparkle and its Al-sensitive mutant E107 (brz). The strain Cupriavidus sp. D39 was the most-efficient in the growth promotion of hydroponically grown peas treated with 80 µM AlCl3, increasing the plant biomass of Sparkle by 20% and of E107 (brz) by two-times. This strain immobilized Al in the nutrient solution and decreased its concentration in E107 (brz) roots. The mutant showed upregulated exudation of organic acids, amino acids, and sugars in the absence or presence of Al as compared with Sparkle, and in most cases, the Al treatment stimulated exudation. Bacteria utilized root exudates and more actively colonized the root surface of E107 (brz). The exudation of tryptophan and the production of IAA by Cupriavidus sp. D39 in the root zone of the Al-treated mutant were observed. Aluminum disturbed the concentrations of nutrients in plants, but inoculation with Cupriavidus sp. D39 partially restored such negative effects. Thus, the E107 (brz) mutant is a useful tool for studying the mechanisms of plant-microbe interactions, and PGPR plays an important role in protecting plants against Al toxicity.
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Affiliation(s)
- Andrey A Belimov
- All-Russia Research Institute for Agricultural Microbiology, Podbelskogo sh. 3, Pushkin, 196608 Saint-Petersburg, Russia
| | - Alexander I Shaposhnikov
- All-Russia Research Institute for Agricultural Microbiology, Podbelskogo sh. 3, Pushkin, 196608 Saint-Petersburg, Russia
| | - Tatiana S Azarova
- All-Russia Research Institute for Agricultural Microbiology, Podbelskogo sh. 3, Pushkin, 196608 Saint-Petersburg, Russia
| | - Oleg S Yuzikhin
- All-Russia Research Institute for Agricultural Microbiology, Podbelskogo sh. 3, Pushkin, 196608 Saint-Petersburg, Russia
| | - Edgar A Sekste
- All-Russia Research Institute for Agricultural Microbiology, Podbelskogo sh. 3, Pushkin, 196608 Saint-Petersburg, Russia
| | - Vera I Safronova
- All-Russia Research Institute for Agricultural Microbiology, Podbelskogo sh. 3, Pushkin, 196608 Saint-Petersburg, Russia
| | - Igor A Tikhonovich
- All-Russia Research Institute for Agricultural Microbiology, Podbelskogo sh. 3, Pushkin, 196608 Saint-Petersburg, Russia
- Department of Biology, Saint-Petersburg State University, University Embankment, 199034 Saint-Petersburg, Russia
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Tong A, Liu W, Wang H, Liu X, Xia G, Zhu J. Transcriptome analysis provides insights into the cell wall and aluminum toxicity related to rusty root syndrome of Panax ginseng. Front Plant Sci 2023; 14:1142211. [PMID: 37384362 PMCID: PMC10293891 DOI: 10.3389/fpls.2023.1142211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 05/02/2023] [Indexed: 06/30/2023]
Abstract
Rusty root syndrome is a common and serious disease in the process of Panax ginseng cultivation. This disease greatly decreases the production and quality of P. ginseng and causes a severe threat to the healthy development of the ginseng industry. However, its pathogenic mechanism remains unclear. In this study, Illumina high-throughput sequencing (RNA-seq) technology was used for comparative transcriptome analysis of healthy and rusty root-affected ginseng. The roots of rusty ginseng showed 672 upregulated genes and 526 downregulated genes compared with the healthy ginseng roots. There were significant differences in the expression of genes involved in the biosynthesis of secondary metabolites, plant hormone signal transduction, and plant-pathogen interaction. Further analysis showed that the cell wall synthesis and modification of ginseng has a strong response to rusty root syndrome. Furthermore, the rusty ginseng increased aluminum tolerance by inhibiting Al entering cells through external chelating Al and cell wall-binding Al. The present study establishes a molecular model of the ginseng response to rusty roots. Our findings provide new insights into the occurrence of rusty root syndrome, which will reveal the underlying molecular mechanisms of ginseng response to this disease.
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Affiliation(s)
- Aizi Tong
- Key Laboratory of Evaluation and Application of Changbai Mountain Biological Germplasm Resources of Jilin Province, College of Life Science, Tonghua Normal University, Tonghua, China
| | - Wei Liu
- Key Laboratory of Evaluation and Application of Changbai Mountain Biological Germplasm Resources of Jilin Province, College of Life Science, Tonghua Normal University, Tonghua, China
| | - Haijiao Wang
- College of Life Science, Changchun Normal University, Changchun, China
| | - Xiaoliang Liu
- Key Laboratory of Evaluation and Application of Changbai Mountain Biological Germplasm Resources of Jilin Province, College of Life Science, Tonghua Normal University, Tonghua, China
| | - Guangqing Xia
- Key Laboratory of Evaluation and Application of Changbai Mountain Biological Germplasm Resources of Jilin Province, College of Life Science, Tonghua Normal University, Tonghua, China
| | - Junyi Zhu
- Key Laboratory of Evaluation and Application of Changbai Mountain Biological Germplasm Resources of Jilin Province, College of Life Science, Tonghua Normal University, Tonghua, China
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6
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Wang J, Su C, Cui Z, Huang L, Gu S, Jiang S, Feng J, Xu H, Zhang W, Jiang L, Zhao M. Transcriptomics and metabolomics reveal tolerance new mechanism of rice roots to Al stress. Front Genet 2023; 13:1063984. [PMID: 36704350 PMCID: PMC9871393 DOI: 10.3389/fgene.2022.1063984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/15/2022] [Indexed: 01/12/2023] Open
Abstract
The prevalence of soluble aluminum (Al) ions is one of the major limitations to crop production worldwide on acid soils. Therefore, understanding the Al tolerance mechanism of rice and applying Al tolerance functional genes in sensitive plants can significantly improve Al stress resistance. In this study, transcriptomics and metabolomics analyses were performed to reveal the mechanism of Al tolerance differences between two rice landraces (Al-tolerant genotype Shibanzhan (KR) and Al-sensitive genotype Hekedanuo (MR) with different Al tolerance. The results showed that DEG related to phenylpropanoid biosynthesis was highly enriched in KR and MR after Al stress, indicating that phenylpropanoid biosynthesis may be closely related to Al tolerance. E1.11.1.7 (peroxidase) was the most significant enzyme of phenylpropanoid biosynthesis in KR and MR under Al stress and is regulated by multiple genes. We further identified that two candidate genes Os02g0770800 and Os06g0521900 may be involved in the regulation of Al tolerance in rice. Our results not only reveal the resistance mechanism of rice to Al stress to some extent, but also provide a useful reference for the molecular mechanism of different effects of Al poisoning on plants.
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Wang Y, Yang S, Li C, Hu T, Hou S, Bai Q, Ji X, Xu F, Guo C, Huang M, Cai Y, Liu J. The plasma membrane-localized OsNIP1;2 mediates internal aluminum detoxification in rice. Front Plant Sci 2022; 13:970270. [PMID: 36172551 PMCID: PMC9512054 DOI: 10.3389/fpls.2022.970270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Aluminum (Al) toxicity significantly restricts crop production on acidic soils. Although rice is highly resistant to Al stress, the underlying resistant mechanisms are not fully understood. Here, we characterized the function of OsNIP1;2, a plasma membrane-localized nodulin 26-like intrinsic protein (NIP) in rice. Aluminum stress specifically and quickly induced OsNIP1;2 expression in the root. Functional mutations of OsNIP1;2 in two independent rice lines led to significantly enhanced sensitivity to Al but not other metals. Moreover, the Osnip1;2 mutants had considerably more Al accumulated in the root cell wall but less in the cytosol than the wild-type rice. In addition, compared with the wild-type rice plants, the Osnip1;2 mutants contained more Al in the root but less in the shoot. When expressed in yeast, OsNIP1;2 led to enhanced Al accumulation in the cells and enhanced sensitivity to Al stress, suggesting that OsNIP1;2 facilitated Al uptake in yeast. These results suggest that OsNIP1;2 confers internal Al detoxification via taking out the root cell wall's Al, sequestering it to the root cell's vacuole, and re-distributing it to the above-ground tissues.
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Affiliation(s)
- Yuqi Wang
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
- Robert W. Holley Center, United States Department of Agriculture, Agricultural Research Service, Cornell University, Ithaca, NY, United States
| | - Shaohua Yang
- Institute of Biotechnology, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Chune Li
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
| | - Taijiao Hu
- Institute of Biotechnology, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Siyu Hou
- School of Agriculture, Shanxi Agricultural University, Jinzhong, China
| | - Qing Bai
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
| | - Xiyue Ji
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
| | - Feng Xu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
| | - Chongdai Guo
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
| | - Min Huang
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
| | - Yanfei Cai
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Jiping Liu
- Robert W. Holley Center, United States Department of Agriculture, Agricultural Research Service, Cornell University, Ithaca, NY, United States
- Plant Breeding and Genetics Section, School of Integrative Plant Sciences, Cornell University, Ithaca, NY, United States
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Jia Y, Pradeep K, Vance WH, Zhang X, Weir B, Wei H, Deng Z, Zhang Y, Xu X, Zhao C, Berger JD, Bell RW, Li C. Identification of two chickpea multidrug and toxic compound extrusion transporter genes transcriptionally upregulated upon aluminum treatment in root tips. Front Plant Sci 2022; 13:909045. [PMID: 35991422 PMCID: PMC9389367 DOI: 10.3389/fpls.2022.909045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 07/15/2022] [Indexed: 06/15/2023]
Abstract
Aluminum (Al) toxicity poses a significant challenge for the yield improvement of chickpea, which is an economically important legume crop with high nutritional value in human diets. The genetic basis of Al-tolerance in chickpea remains unclear. Here, we assessed the Al-tolerance of 8 wild Cicer and one cultivated chickpea (PBA Pistol) accessions by measuring the root elongation in solution culture under control (0 μM Al3+) and Al treatments (15, 30 μM Al3+). Compared to PBA Pistol, the wild Cicer accessions displayed both tolerant and sensitive phenotypes, supporting wild Cicer as a potential genetic pool for Al-tolerance improvement. To identify potential genes related to Al-tolerance in chickpea, genome-wide screening of multidrug and toxic compound extrusion (MATE) encoding genes was performed. Fifty-six MATE genes were identified in total, which can be divided into 4 major phylogenetic groups. Four chickpea MATE genes (CaMATE1-4) were clustered with the previously characterized citrate transporters MtMATE66 and MtMATE69 in Medicago truncatula. Transcriptome data showed that CaMATE1-4 have diverse expression profiles, with CaMATE2 being root-specific. qRT-PCR analyses confirmed that CaMATE2 and CaMATE4 were highly expressed in root tips and were up-regulated upon Al treatment in all chickpea lines. Further measurement of carboxylic acids showed that malonic acid, instead of malate or citrate, is the major extruded acid by Cicer spp. root. Protein structural modeling analyses revealed that CaMATE2 has a divergent substrate-binding cavity from Arabidopsis AtFRD3, which may explain the different acid-secretion profile for chickpea. Pangenome survey showed that CaMATE1-4 have much higher genetic diversity in wild Cicer than that in cultivated chickpea. This first identification of CaMATE2 and CaMATE4 responsive to Al3+ treatment in Cicer paves the way for future functional characterization of MATE genes in Cicer spp., and to facilitate future design of gene-specific markers for Al-tolerant line selection in chickpea breeding programs.
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Affiliation(s)
- Yong Jia
- Western Crop Genetic Alliance, Murdoch University, Perth, WA, Australia
- State Agricultural Biotechnology Centre, College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
- Department of Primary Industry and Regional Development, Government of Western Australia, Perth, WA, Australia
| | - Karthika Pradeep
- Centre for Sustainable Farming Systems, Future Foods Institute, Murdoch University, Perth, WA, Australia
| | - Wendy H. Vance
- Centre for Sustainable Farming Systems, Future Foods Institute, Murdoch University, Perth, WA, Australia
| | - Xia Zhang
- Shandong Provincial Key Laboratory of Dryland Farming Technology, College of Agronomy, Qingdao Agricultural University, Qingdao, China
| | - Brayden Weir
- State Agricultural Biotechnology Centre, College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
| | - Hongru Wei
- College of Horticulture, Qingdao Agricultural University, Qingdao, China
| | - Zhiwei Deng
- College of Horticulture, Qingdao Agricultural University, Qingdao, China
| | - Yujuan Zhang
- State Agricultural Biotechnology Centre, College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
| | - Xuexin Xu
- Shandong Provincial Key Laboratory of Dryland Farming Technology, College of Agronomy, Qingdao Agricultural University, Qingdao, China
| | - Changxing Zhao
- Shandong Provincial Key Laboratory of Dryland Farming Technology, College of Agronomy, Qingdao Agricultural University, Qingdao, China
| | | | - Richard William Bell
- Centre for Sustainable Farming Systems, Future Foods Institute, Murdoch University, Perth, WA, Australia
| | - Chengdao Li
- Western Crop Genetic Alliance, Murdoch University, Perth, WA, Australia
- State Agricultural Biotechnology Centre, College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
- Department of Primary Industry and Regional Development, Government of Western Australia, Perth, WA, Australia
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9
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Niu E, Gao S, Yu X, Soleimani A, Zhu S. Comprehensive evaluation of the response to aluminum stress in olive tree ( Olea europaea L.). Front Plant Sci 2022; 13:968499. [PMID: 35968113 PMCID: PMC9366337 DOI: 10.3389/fpls.2022.968499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 07/05/2022] [Indexed: 06/06/2023]
Abstract
Olive (Olea europaea L.) is an ancient tree species in the Mediterranean, but the lack of knowledge about aluminum-resistant varieties limits its introduction to acidic soil. The objective of this study was to have a comprehensive evaluation of the response to aluminum stress in olive tree at germplasm, metabolome, and transcriptome levels. In this experiment, seedlings of 97 olive germplasm with 1.0-3.0 cm roots and two leaves were treated with 50 μM Al3+ (pH = 5.0). By factor analysis of the traits of defoliation rate, rooting rate, length of extended root, and length of new root, 97 germplasm were classified into five different groups according to their diverse responses to aluminum stress: 5 highly resistant (5.15%), 30 moderately resistant (30.93%), 31 general (31.96%), 23 moderately sensitive (23.71%), and 8 highly sensitive (8.25%) germplasm. The three most sensitive and three most resistant germplasm were further used for metabolome and transcriptome analysis. Exposed to aluminum stress, 96 differentially accumulated metabolites (DAMs)/4,845 differentially expressed genes (DEGs) and 66 DAMs/2,752 DEGs were identified in highly sensitive and resistant germplasm, respectively. Using multi-omics technology, the pathways and related DAMs/DEGs involved in cell wall/cytoplasm receptors, reactive oxygen species balance, hormone induction, synthesis of organic acids, Al3+ transport, and synthesis of metabolites were identified to mainly regulate the response to aluminum stress in olive. This study provides a theoretical guide and prior germplasm and genes for further genetic improvement of aluminum tolerance in the olive tree.
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Affiliation(s)
- Erli Niu
- Key Laboratory of Digital Dry Land Crops of Zhejiang Province, Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Song Gao
- Key Laboratory of Digital Dry Land Crops of Zhejiang Province, Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Xiaomin Yu
- Key Laboratory of Digital Dry Land Crops of Zhejiang Province, Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Ali Soleimani
- Faculty of Agriculture, University of Zanjan, Zanjan, Iran
| | - Shenlong Zhu
- Key Laboratory of Digital Dry Land Crops of Zhejiang Province, Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
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Abd El-Moneim D, Contreras R, Silva-Navas J, Gallego FJ, Figueiras AM, Benito C. Repression of Mitochondrial Citrate Synthase Genes by Aluminum Stress in Roots of Secale cereale and Brachypodium distachyon. Front Plant Sci 2022; 13:832981. [PMID: 35463451 PMCID: PMC9021840 DOI: 10.3389/fpls.2022.832981] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Aluminum (Al) toxicity in acid soils influences plant development and yield. Almost 50% of arable land is acidic. Plants have evolved a variety of tolerance mechanisms for Al. In response to the presence of Al, various species exudate citrate from their roots. Rye (Secale cereale L.) secretes both citrate and malate, making it one of the most Al-tolerant cereal crops. However, no research has been done on the role of the mitochondrial citrate synthase (mCS) gene in Al-induced stress in the rye. We have isolated an mCS gene, encoding a mitochondrial CS isozyme, in two S. cereale cultivars (Al-tolerant cv. Ailés and Al-sensitive inbred rye line Riodeva; ScCS4 gene) and in two Brachypodium distachyon lines (Al-tolerant ABR8 line and Al-sensitive ABR1 line; BdCS4 gene). Both mCS4 genes have 19 exons and 18 introns. The ScCS4 gene was located on the 6RL rye chromosome arm. Phylogenetic studies using cDNA and protein sequences have shown that the ScCS4 gene and their ScCS protein are orthologous to mCS genes and CS proteins of different Poaceae plants. Expression studies of the ScCS4 and BdSC4 genes show that the amount of their corresponding mRNAs in the roots is higher than that in the leaves and that the amounts of mRNAs in plants treated and not treated with Al were higher in the Al-tolerant lines than that in the Al-sensitive lines of both species. In addition, the levels of ScCS4 and BdCS4 mRNAs were reduced in response to Al (repressive behavior) in the roots of the tolerant and sensitive lines of S. cereale and B. distachyon.
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11
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Wen K, Pan H, Li X, Huang R, Ma Q, Nian H. Identification of an ATP-Binding Cassette Transporter Implicated in Aluminum Tolerance in Wild Soybean ( Glycine soja). Int J Mol Sci 2021; 22:13264. [PMID: 34948067 PMCID: PMC8706246 DOI: 10.3390/ijms222413264] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 12/02/2021] [Accepted: 12/07/2021] [Indexed: 01/05/2023] Open
Abstract
The toxicity of aluminum (Al) in acidic soil limits global crop yield. The ATP-binding cassette (ABC) transporter-like gene superfamily has functions and structures related to transportation, so it responds to aluminum stress in plants. In this study, one half-size ABC transporter gene was isolated from wild soybeans (Glycine soja) and designated GsABCI1. By real-time qPCR, GsABCI1 was identified as not specifically expressed in tissues. Phenotype identification of the overexpressed transgenic lines showed increased tolerance to aluminum. Furthermore, GsABCI1 transgenic plants exhibited some resistance to aluminum treatment by ion translocation or changing root components. This work on the GsABCI1 identified the molecular function, which provided useful information for understanding the gene function of the ABC family and the development of new aluminum-tolerant soybean germplasm.
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Affiliation(s)
- Ke Wen
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (K.W.); (H.P.); (X.L.); (R.H.); (Q.M.)
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of the National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- Zengcheng Teaching and Research Bases, South China Agricultural University, Guangzhou 510642, China
| | - Huanting Pan
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (K.W.); (H.P.); (X.L.); (R.H.); (Q.M.)
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of the National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- Zengcheng Teaching and Research Bases, South China Agricultural University, Guangzhou 510642, China
| | - Xingang Li
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (K.W.); (H.P.); (X.L.); (R.H.); (Q.M.)
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of the National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- Zengcheng Teaching and Research Bases, South China Agricultural University, Guangzhou 510642, China
| | - Rong Huang
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (K.W.); (H.P.); (X.L.); (R.H.); (Q.M.)
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of the National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- Zengcheng Teaching and Research Bases, South China Agricultural University, Guangzhou 510642, China
| | - Qibin Ma
- The State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China; (K.W.); (H.P.); (X.L.); (R.H.); (Q.M.)
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of the National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- Zengcheng Teaching and Research Bases, 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; (K.W.); (H.P.); (X.L.); (R.H.); (Q.M.)
- The Key Laboratory of Plant Molecular Breeding of Guangdong Province, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- The National Engineering Research Center of Plant Space Breeding, South China Agricultural University, Guangzhou 510642, China
- The Guangdong Subcenter of the National Center for Soybean Improvement, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
- Zengcheng Teaching and Research Bases, South China Agricultural University, Guangzhou 510642, China
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12
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Haruma T, Yamaji K, Masuya H. Phialocephala fortinii increases aluminum tolerance in Miscanthus sinensis growing in acidic mine soil. Lett Appl Microbiol 2021; 73:300-307. [PMID: 34042204 DOI: 10.1111/lam.13514] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 12/27/2022]
Abstract
Miscanthus sinensis growing in our study mine site contained a high concentration of Al in the adventitious roots. It has a root endophyte, Phialocephala fortinii, in its adventitious roots at a high frequency. The purpose of this study was to elucidate the effects of P. fortinii on Al tolerance mechanisms of M. sinensis and reveal potential underlying mechanisms. In the absence of P. fortinii, M. sinensis produced chlorogenic, citric, and malic acids that could act to alleviate Al toxicity in acidic mine soil. Up on fungal inoculation, the levels of these compounds were reduced, although the growth of seedlings and Mg concentration in the roots were increased. IAA production by the fungus may contribute to enhanced plant growth whereas an increase of Mg uptake could reduce toxicity of reactive oxygen species under Al stress. These actions of P. fortinii could promote growth and survival of M. sinensis in mine sites.
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Affiliation(s)
- T Haruma
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Naka, Japan.,Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - K Yamaji
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - H Masuya
- Department of Mushroom Science and Forest Microbiology Forestry and Forest Products Research Institute, Tsukuba, Japan
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13
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Tokizawa M, Enomoto T, Ito H, Wu L, Kobayashi Y, Mora-Macías J, Armenta-Medina D, Iuchi S, Kobayashi M, Nomoto M, Tada Y, Fujita M, Shinozaki K, Yamamoto YY, Kochian LV, Koyama H. High affinity promoter binding of STOP1 is essential for early expression of novel aluminum-induced resistance genes GDH1 and GDH2 in Arabidopsis. J Exp Bot 2021; 72:2769-2789. [PMID: 33481007 DOI: 10.1093/jxb/erab031] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 05/28/2023]
Abstract
Malate efflux from roots, which is regulated by the transcription factor STOP1 (SENSITIVE-TO-PROTON-RHIZOTOXICITY1) and mediates aluminum-induced expression of ALUMINUM-ACTIVATED-MALATE-TRANSPORTER1 (AtALMT1), is critical for aluminum resistance in Arabidopsis thaliana. Several studies showed that AtALMT1 expression in roots is rapidly observed in response to aluminum; this early induction is an important mechanism to immediately protect roots from aluminum toxicity. Identifying the molecular mechanisms that underlie rapid aluminum resistance responses should lead to a better understanding of plant aluminum sensing and signal transduction mechanisms. In this study, we observed that GFP-tagged STOP1 proteins accumulated in the nucleus soon after aluminum treatment. The rapid aluminum-induced STOP1-nuclear localization and AtALMT1 induction were detected in the presence of a protein synthesis inhibitor, suggesting that post-translational regulation is involved in these events. STOP1 also regulated rapid aluminum-induced expression for other genes that carry a functional/high-affinity STOP1-binding site in their promoter, including STOP2, GLUTAMATE-DEHYDROGENASE1 and 2 (GDH1 and 2). However STOP1 did not regulate Al resistance genes which have no functional STOP1-binding site such as ALUMINUM-SENSITIVE3, suggesting that the binding of STOP1 in the promoter is essential for early induction. Finally, we report that GDH1 and 2 which are targets of STOP1, are novel aluminum-resistance genes in Arabidopsis.
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Affiliation(s)
- Mutsutomo Tokizawa
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
- Global Institute for Food Security, University of Saskatchewan, Saskatoon S7N 4J8, Canada
| | - Takuo Enomoto
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - Hiroki Ito
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - Liujie Wu
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
- University of Warwick, UK
| | - Yuriko Kobayashi
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
| | - Javier Mora-Macías
- Global Institute for Food Security, University of Saskatchewan, Saskatoon S7N 4J8, Canada
| | - Dagoberto Armenta-Medina
- CONACyT Consejo Nacional de Ciencia y Tecnología, Dirección de Cátedras, Insurgentes Sur 1582, Crédito Constructor, 03940 Ciudad de México, México
- INFOTEC Centro de Investigación e Innovación en Tecnologías de la Informacion y Comunicación, Circuito Tecnopolo Sur No 112, Fracc. Tecnopolo Pocitos II, 20313 Aguascalientes, México
| | - Satoshi Iuchi
- RIKEN Bioresource Research Center, Ibaraki 305-0074, Japan
| | | | - Mika Nomoto
- Center for Gene Research, Nagoya University, Nagoya 464-8602, Japan
| | - Yasuomi Tada
- Center for Gene Research, Nagoya University, Nagoya 464-8602, Japan
| | - Miki Fujita
- RIKEN Center for Sustainable Resource Science, Yokohama 230-0045, Japan
| | - Kazuo Shinozaki
- RIKEN Center for Sustainable Resource Science, Yokohama 230-0045, Japan
| | - Yoshiharu Y Yamamoto
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
- RIKEN Center for Sustainable Resource Science, Yokohama 230-0045, Japan
| | - Leon V Kochian
- Global Institute for Food Security, University of Saskatchewan, Saskatoon S7N 4J8, Canada
| | - Hiroyuki Koyama
- Applied Biological Sciences, Gifu University, Gifu 501-1193, Japan
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14
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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. Front Plant Sci 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] [What about the content of this article? (0)] [Affiliation(s)] [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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Gu X, Li J, Wang X, He X, Cui Y. Laccaria bicolor Mobilizes both Labile Aluminum and Inorganic Phosphate in Rhizosphere Soil of Pinus massoniana Seedlings Field Grown in a Yellow Acidic Soil. Appl Environ Microbiol 2020; 86:e03015-19. [PMID: 32060022 DOI: 10.1128/AEM.03015-19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 02/05/2020] [Indexed: 11/20/2022] Open
Abstract
Plant growth is often limited by highly activated aluminum (Al) and low available phosphorus (P) in acidic soil. Ectomycorrhizal (ECM) fungi can improve their host plants' Al tolerance by increasing P availability while decreasing Al activity in vitro or in hydroponic or sand culture systems. However, the effect of ECM fungi on inorganic P (IP) and labile Al in acidic soil in the field, particularly in conjunction with Al treatment, remains poorly understood. The present study aimed to determine the influence of ECM fungal association on the mobilization of IP and labile Al in rhizosphere soil of host plants grown in the field with external Al treatment and the underlying nutritional mechanism in plant Al tolerance. To do so, 4-week-old Pinus massoniana seedlings were inoculated with three ECM isolates (Laccaria bicolor 270, L. bicolor S238A, and L. bicolor S238N) and grown in a Haplic Alisol field with or without Al treatment for 12 weeks. Results showed that L. bicolor association enhanced the available P depletion and facilitated the mobilization of IP and labile Al, in turn improving the capacity of host plant to use Al-bound P, Ca-bound P, and occluded P, particularly when P. massoniana seedlings were inoculated with L. bicolor S238A. Inoculation with L. bicolor isolates also enhanced the solubility of labile Al and facilitated the conversion of acid-soluble Al into exchangeable Al. Our findings suggested that ECM inoculation could enhance plant Al tolerance in the field by mobilizing IP to improve the P bioavailability but not by decreasing Al activity.IMPORTANCE Here, we reveal the underlying nutritional mechanism in plant Al tolerance conferred by ectomycorrhizal (ECM)-fungus inoculation in the field and report the screening of a promising ECM isolate to assist phytoremediation and afforestation using Pinus massoniana in acidic soil in southern China. This study advances our understanding of the contribution of ECM fungi to plant-ECM-fungus symbiosis and highlights the vital role of ECM-fungus inoculation in plant Al tolerance. In addition, the results described in the present study confirm the importance of carrying out studies in the field rather than only in vitro studies. Our findings strengthen our understanding of the role of ECM-fungus association in detecting, utilizing, and transporting unavailable nutrients in the soil to enhance host plant growth and adaptability in response to adverse habitats.
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Gallo-Franco JJ, Sosa CC, Ghneim-Herrera T, Quimbaya M. Epigenetic Control of Plant Response to Heavy Metal Stress: A New View on Aluminum Tolerance. Front Plant Sci 2020; 11:602625. [PMID: 33391313 PMCID: PMC7772216 DOI: 10.3389/fpls.2020.602625] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 11/23/2020] [Indexed: 05/05/2023]
Abstract
High concentrations of heavy metal (HM) ions impact agronomic staple crop production in acid soils (pH ≤ 5) due to their cytotoxic, genotoxic, and mutagenic effects. Among cytotoxic ions, the trivalent aluminum cation (Al3+) formed by solubilization of aluminum (Al) into acid soils, is one of the most abundant and toxic elements under acidic conditions. In recent years, several studies have elucidated the different signal transduction pathways involved in HM responses, identifying complementary genetic mechanisms conferring tolerance to plants. Although epigenetics has become more relevant in abiotic stress studies, epigenetic mechanisms underlying plant responses to HM stress remain poorly understood. This review describes the main epigenetic mechanisms related to crop responses during stress conditions, specifically, the molecular evidence showing how epigenetics is at the core of plant adaptation responses to HM ions. We highlight the epigenetic mechanisms that induce Al tolerance. Likewise, we analyze the pivotal relationship between epigenetic and genetic factors associated with HM tolerance. Finally, using rice as a study case, we performed a general analysis over previously whole-genome bisulfite-seq published data. Specific genes related to Al tolerance, measured in contrasting tolerant and susceptible rice varieties, exhibited differences in DNA methylation frequency. The differential methylation patterns could be associated with epigenetic regulation of rice responses to Al stress, highlighting the major role of epigenetics over specific abiotic stress responses.
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Affiliation(s)
- Jenny Johana Gallo-Franco
- Departamento de Ciencias Naturales y Matemáticas, Pontificia Universidad Javeriana, Cali, Cali, Colombia
| | - Chrystian Camilo Sosa
- Departamento de Ciencias Naturales y Matemáticas, Pontificia Universidad Javeriana, Cali, Cali, Colombia
- Grupo de Investigación en Evolución, Ecología y Conservación EECO, Programa de Biología, Facultad de Ciencias Básicas y Tecnologías, Universidad del Quindío, Armenia, Colombia
| | | | - Mauricio Quimbaya
- Departamento de Ciencias Naturales y Matemáticas, Pontificia Universidad Javeriana, Cali, Cali, Colombia
- *Correspondence: Mauricio Quimbaya,
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Magalhaes JV, Piñeros MA, Maciel LS, Kochian LV. Emerging Pleiotropic Mechanisms Underlying Aluminum Resistance and Phosphorus Acquisition on Acidic Soils. Front Plant Sci 2018; 9:1420. [PMID: 30319678 PMCID: PMC6168647 DOI: 10.3389/fpls.2018.01420] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 09/06/2018] [Indexed: 05/25/2023]
Abstract
Aluminum (Al) toxicity on acidic soils significantly damages plant roots and inhibits root growth. Hence, crops intoxicated by Al become more sensitive to drought stress and mineral nutrient deficiencies, particularly phosphorus (P) deficiency, which is highly unavailable on tropical soils. Advances in our understanding of the physiological and genetic mechanisms that govern plant Al resistance have led to the identification of Al resistance genes, both in model systems and in crop species. It has long been known that Al resistance has a beneficial effect on crop adaptation to acidic soils. This positive effect happens because the root systems of Al resistant plants show better development in the presence of soil ionic Al3+ and are, consequently, more efficient in absorbing sub-soil water and mineral nutrients. This effect of Al resistance on crop production, by itself, warrants intensified efforts to develop and implement, on a breeding scale, modern selection strategies to profit from the knowledge of the molecular determinants of plant Al resistance. Recent studies now suggest that Al resistance can exert pleiotropic effects on P acquisition, potentially expanding the role of Al resistance on crop adaptation to acidic soils. This appears to occur via both organic acid (OA)- and non-OA transporters governing a joint, iron-dependent interplay between Al resistance and enhanced P uptake, via changes in root system architecture. Current research suggests this interplay to be part of a P stress response, suggesting that this mechanism could have evolved in crop species to improve adaptation to acidic soils. Should this pleiotropism prove functional in crop species grown on acidic soils, molecular breeding based on Al resistance genes may have a much broader impact on crop performance than previously anticipated. To explore this possibility, here we review the components of this putative effect of Al resistance genes on P stress responses and P nutrition to provide the foundation necessary to discuss the recent evidence suggesting pleiotropy as a genetic linkage between Al resistance and P efficiency. We conclude by exploring what may be needed to enhance the utilization of Al resistance genes to improve crop production on acidic soils.
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Affiliation(s)
- Jurandir V. Magalhaes
- Embrapa Maize and Sorghum, Sete Lagoas, Brazil
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Miguel A. Piñeros
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY, United States
| | - Laiane S. Maciel
- 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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18
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Wang Y, Cai Y, Cao Y, Liu J. Aluminum-activated root malate and citrate exudation is independent of NIP1;2-facilitated root-cell-wall aluminum removal in Arabidopsis. Plant Signal Behav 2018; 13:e1422469. [PMID: 29293394 PMCID: PMC5790415 DOI: 10.1080/15592324.2017.1422469] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 12/12/2017] [Accepted: 12/21/2017] [Indexed: 05/27/2023]
Abstract
In Arabidopsis, aluminum (Al) exclusion from the root is mainly facilitated by Al-activated root malate and citrate exudation through the ALMT1 malate transporter and the MATE citrate transporter, respectively. However, the nature of an internal Al tolerance mechanism remains largely unknown. In a recent study, we showed that NIP1;2 facilitates Al-malate transport from the root cell wall into the root symplasm and subsequent root-to-shoot translocation and thus NIP1;2 plays key roles in Al detoxification and internal tolerance in Arabidopsis. We discovered that the NIP1;2-mediated Al removal from the root cell wall requires a functional ALMT1-mediated malate exudation system, which allows the formation of an Al-malate complex in the root cell wall. Thus, a coordinated function between the exclusion and the internal resistance mechanisms, linked by the ALMT1-mediated root malate exudation and the NIP1;2-mediated Al uptake system, is critical for Al resistance in Arabidopsis.
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Affiliation(s)
- Yuqi Wang
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, Guangdong, China
- Robert W. Holley Center, US Department of Agriculture, Agricultural Research Service, Cornell University, Ithaca, NY, USA
| | - Yanfei Cai
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Guangdong, China
| | - Yu Cao
- Robert W. Holley Center, US Department of Agriculture, Agricultural Research Service, Cornell University, Ithaca, NY, USA
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jiping Liu
- Robert W. Holley Center, US Department of Agriculture, Agricultural Research Service, Cornell University, Ithaca, NY, USA
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Wang Y, Li R, Li D, Jia X, Zhou D, Li J, Lyi SM, Hou S, Huang Y, Kochian LV, Liu J. NIP1;2 is a plasma membrane-localized transporter mediating aluminum uptake, translocation, and tolerance in Arabidopsis. Proc Natl Acad Sci U S A 2017; 114:5047-52. [PMID: 28439024 DOI: 10.1073/pnas.1618557114] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Members of the aquaporin (AQP) family have been suggested to transport aluminum (Al) in plants; however, the Al form transported by AQPs and the roles of AQPs in Al tolerance remain elusive. Here we report that NIP1;2, a plasma membrane-localized member of the Arabidopsis nodulin 26-like intrinsic protein (NIP) subfamily of the AQP family, facilitates Al-malate transport from the root cell wall into the root symplasm, with subsequent Al xylem loading and root-to-shoot translocation, which are critical steps in an internal Al tolerance mechanism in Arabidopsis We found that NIP1;2 transcripts are expressed mainly in the root tips, and that this expression is enhanced by Al but not by other metal stresses. Mutations in NIP1;2 lead to hyperaccumulation of toxic Al3+ in the root cell wall, inhibition of root-to-shoot Al translocation, and a significant reduction in Al tolerance. NIP1;2 facilitates the transport of Al-malate, but not Al3+ ions, in both yeast and Arabidopsis We demonstrate that the formation of the Al-malate complex in the root tip apoplast is a prerequisite for NIP1;2-mediated Al removal from the root cell wall, and that this requires a functional root malate exudation system mediated by the Al-activated malate transporter, ALMT1. Taken together, these findings reveal a critical linkage between the previously identified Al exclusion mechanism based on root malate release and an internal Al tolerance mechanism identified here through the coordinated function of NIP1;2 and ALMT1, which is required for Al removal from the root cell wall, root-to-shoot Al translocation, and overall Al tolerance in Arabidopsis.
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Zhang L, Wu XX, Wang J, Qi C, Wang X, Wang G, Li M, Li X, Guo YD. BoALMT1, an Al-Induced Malate Transporter in Cabbage, Enhances Aluminum Tolerance in Arabidopsis thaliana. Front Plant Sci 2017; 8:2156. [PMID: 29410672 PMCID: PMC5787101 DOI: 10.3389/fpls.2017.02156] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 12/06/2017] [Indexed: 05/02/2023]
Abstract
Aluminum (Al) is present in approximately 50% of the arable land worldwide and is regarded as the main limiting factor of crop yield on acidic soil. Al-induced root malate efflux plays an important role in the Al tolerance of plants. Here, the aluminum induced malate transporter BoALMT1 (KF322104) was cloned from cabbage (Brassica oleracea). BoALMT1 showed higher expression in roots than in shoots. The expression of BoALMT1 was specifically induced by Al treatment, but not the trivalent cations lanthanum (La), cadmium (Cd), zinc (Zn), or copper (Cu). Subcellular localization studies were performed in onion epidermal cells and revealed that BoALMT1 was localized at the plasma membrane. Scanning Ion-selective Electrode Technique was used to analyze H+ flux. Xenopus oocytes and Arabidopsis thaliana expressing BoALMT1 excreted more H+ under Al treatment. Overexpressing BoALMT1 in transgenic Arabidopsis resulted in enhanced Al tolerance and increased malate secretion. The results suggested that BoALMT1 functions as an Al-resistant gene and encodes a malate transporter. Expressing BoALMT1 in Xenopus oocytes or A. thaliana indicated that BoALMT1 could increase malate secretion and H+ efflux to resist Al tolerance.
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Affiliation(s)
- Lei Zhang
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, China
| | - Xin-Xin Wu
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, China
| | - Jinfang Wang
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, China
| | - Chuandong Qi
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, China
| | - Xiaoyun Wang
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, China
| | - Gongle Wang
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, China
| | - Mingyue Li
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, China
| | - Xingsheng Li
- Shandong Huasheng Agriculture Co. Ltd, Shandong, China
| | - Yang-Dong Guo
- Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, College of Horticulture, China Agricultural University, Beijing, China
- *Correspondence: Yang-Dong Guo
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Sharma T, Dreyer I, Kochian L, Piñeros MA. The ALMT Family of Organic Acid Transporters in Plants and Their Involvement in Detoxification and Nutrient Security. Front Plant Sci 2016; 7:1488. [PMID: 27757118 PMCID: PMC5047901 DOI: 10.3389/fpls.2016.01488] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Accepted: 09/20/2016] [Indexed: 05/02/2023]
Abstract
About a decade ago, members of a new protein family of anion channels were discovered on the basis of their ability to confer on plants the tolerance toward toxic aluminum ions in the soil. The efflux of Al3+-chelating malate anions through these channels is stimulated by external Al3+ ions. This feature of a few proteins determined the name of the entire protein family as Aluminum-activated Malate Transporters (ALMT). Meanwhile, after several years of research, it is known that the physiological roles of ALMTs go far beyond Al-detoxification. In this review article we summarize the current knowledge on this transporter family and assess their involvement in diverse physiological processes.
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Affiliation(s)
- Tripti Sharma
- Centro de Bioinformática y Simulación Molecular, Facultad de Ingeniería, Universidad de Talca, TalcaChile
| | - Ingo Dreyer
- Centro de Bioinformática y Simulación Molecular, Facultad de Ingeniería, Universidad de Talca, TalcaChile
| | - Leon Kochian
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture–Agricultural Research Service, Cornell University, Ithaca, NYUSA
| | - Miguel A. Piñeros
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture–Agricultural Research Service, Cornell University, Ithaca, NYUSA
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22
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Zhou D, Yang Y, Zhang J, Jiang F, Craft E, Thannhauser TW, Kochian LV, Liu J. Quantitative iTRAQ Proteomics Revealed Possible Roles for Antioxidant Proteins in Sorghum Aluminum Tolerance. Front Plant Sci 2016; 7:2043. [PMID: 28119720 PMCID: PMC5220100 DOI: 10.3389/fpls.2016.02043] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Accepted: 12/21/2016] [Indexed: 05/19/2023]
Abstract
Aluminum (Al) toxicity inhibits root growth and limits crop yields on acid soils worldwide. However, quantitative information is scarce on protein expression profiles under Al stress in crops. In this study, we report on the identification of potential Al responsive proteins from root tips of Al sensitive BR007 and Al tolerant SC566 sorghum lines using a strategy employing iTRAQ and 2D-liquid chromatography (LC) coupled to MS/MS (2D-LC-MS/MS). A total of 771 and 329 unique proteins with abundance changes of >1.5 or <0.67-fold were identified in BR007 and SC566, respectively. Protein interaction and pathway analyses indicated that proteins involved in the antioxidant system were more abundant in the tolerant line than in the sensitive one after Al treatment, while opposite trends were observed for proteins involved in lignin biosynthesis. Higher levels of ROS accumulation in root tips of the sensitive line due to decreased activity of antioxidant enzymes could lead to higher lignin production and hyper-accumulation of toxic Al in cell walls. These results indicated that activities of peroxidases and the balance between production and consumption of ROS could be important for Al tolerance and lignin biosynthesis in sorghum.
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Affiliation(s)
- Dangwei Zhou
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture - Agricultural Research Service, Cornell UniversityIthaca, NY, USA
- Center of Plateau Ecology, Northwest Institute of Plateau Biology, Chinese Academy of SciencesXining, China
| | - Yong Yang
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture - Agricultural Research Service, Cornell UniversityIthaca, NY, USA
| | - Jinbiao Zhang
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture - Agricultural Research Service, Cornell UniversityIthaca, NY, USA
- College of Life Sciences, Fujian Agriculture and Forestry UniversityFuzhou, China
| | - Fei Jiang
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture - Agricultural Research Service, Cornell UniversityIthaca, NY, USA
- Agricultural Biotechnology Center, Chengdu Institute of Biology, Chinese Academy of SciencesChengdu, China
| | - Eric Craft
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture - Agricultural Research Service, Cornell UniversityIthaca, NY, USA
| | - Theodore W. Thannhauser
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture - Agricultural Research Service, Cornell UniversityIthaca, NY, USA
| | - Leon V. Kochian
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture - Agricultural Research Service, Cornell UniversityIthaca, NY, USA
| | - Jiping Liu
- Robert W. Holley Center for Agriculture and Health, United States Department of Agriculture - Agricultural Research Service, Cornell UniversityIthaca, NY, USA
- *Correspondence: Jiping Liu
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Zhu H, Wang H, Zhu Y, Zou J, Zhao FJ, Huang CF. Genome-wide transcriptomic and phylogenetic analyses reveal distinct aluminum-tolerance mechanisms in the aluminum-accumulating species buckwheat (Fagopyrum tataricum). BMC Plant Biol 2015; 15:16. [PMID: 25603892 PMCID: PMC4307214 DOI: 10.1186/s12870-014-0395-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 12/22/2014] [Indexed: 05/06/2023]
Abstract
BACKGROUND Similar to common buckwheat (Fagopyrum esculentum), tartary buckwheat (Fagopyrum tataricum) shows a high level of aluminum (Al) tolerance and accumulation. However, the molecular mechanisms for Al detoxification and accumulation are still poorly understood. To begin to elucidate the molecular basis of Al tolerance and accumulation, we used the Illumina high-throughput mRNA sequencing (RNA-seq) technology to conduct a genome-wide transcriptome analysis on both tip and basal segments of the roots exposed to Al. RESULTS By using the Trinity method for the de novo assembly and cap3 software to reduce the redundancy and chimeras of the transcripts, we constructed 39,815 transcripts with an average length of 1184 bp, among which 20,605 transcripts were annotated by BLAST searches in the NCBI non-redundant protein database. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis showed that expression of genes involved in the defense of cell wall toxicity and oxidative stress was preferentially induced by Al stress. Our RNA-seq data also revealed that organic acid metabolism was unlikely to be a rate-limiting step for the Al-induced secretion of organic acids in buckwheat. We identified two citrate transporter genes that were highly induced by Al and potentially involved in the release of citrate into the xylem. In addition, three of four conserved Al-tolerance genes were found to be duplicated in tartary buckwheat and display diverse expression patterns. CONCLUSIONS Nearly 40,000 high quality transcript contigs were de novo assembled for tartary buckwheat, providing a reference platform for future research work in this plant species. Our differential expression and phylogenetic analysis revealed novel aspects of Al-tolerant mechanisms in buckwheat.
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MESH Headings
- Adaptation, Physiological/drug effects
- Adaptation, Physiological/genetics
- Aluminum/toxicity
- Carboxylic Acids/metabolism
- Down-Regulation/drug effects
- Down-Regulation/genetics
- Fagopyrum/drug effects
- Fagopyrum/genetics
- Fagopyrum/physiology
- Gene Expression Profiling
- Gene Expression Regulation, Plant/drug effects
- Gene Ontology
- Genes, Plant
- Genome, Plant
- Molecular Sequence Annotation
- Phylogeny
- Plant Roots/drug effects
- Plant Roots/metabolism
- Plant Shoots/drug effects
- Plant Shoots/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Reproducibility of Results
- Sequence Analysis, RNA
- Sequence Homology, Nucleic Acid
- Species Specificity
- Stress, Physiological/drug effects
- Stress, Physiological/genetics
- Up-Regulation/drug effects
- Up-Regulation/genetics
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Affiliation(s)
- Haifeng Zhu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Hua Wang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.
| | - Yifang Zhu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Jianwen Zou
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Fang-Jie Zhao
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Chao-Feng Huang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China.
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24
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Abstract
Aluminum (Al) toxicity in acid soils is a significant limitation to crop production worldwide, as approximately 50% of the world's potentially arable soil is acidic. Because acid soils are such an important constraint to agriculture, understanding the mechanisms and genes conferring resistance to Al toxicity has been a focus of intense research interest in the decade since the last article on crop acid soil tolerance was published in this journal. An impressive amount of progress has been made during that time that has greatly increased our understanding of the diversity of Al resistance genes and mechanisms, how resistance gene expression is regulated and triggered by Al and Al-induced signals, and how the proteins encoded by these genes function and are regulated. This review examines the state of our understanding of the physiological, genetic, and molecular bases for crop Al tolerance, looking at the novel Al resistance genes and mechanisms that have been identified over the past ten years. Additionally, it examines how the integration of molecular and genetic analyses of crop Al resistance is starting to be exploited for the improvement of crop plants grown on acid soils via both molecular-assisted breeding and biotechnology approaches.
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Affiliation(s)
- Leon V Kochian
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, New York 14853; , ,
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25
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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 Physiol 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] [What about the content of this article? (0)] [Affiliation(s)] [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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26
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Maejima E, Watanabe T. Proportion of phospholipids in the plasma membrane is an important factor in Al tolerance. Plant Signal Behav 2014; 9:e29277. [PMID: 25763499 PMCID: PMC4203505 DOI: 10.4161/psb.29277] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 05/19/2014] [Accepted: 05/19/2014] [Indexed: 05/25/2023]
Abstract
The negative charge on the plasma membrane (PM) is mainly derived from the phosphate group of phospholipids. One of the mechanisms of aluminum (Al) toxicity is to increase the PM permeability of root cells by binding to the negative sites on the PM. Thus, PM with a higher proportion of phospholipids could be more susceptible to Al toxicity. In our previous study, we showed that tolerance to Al and low-calcium in rice was enhanced by decreasing the proportion of phospholipids in root cells. Both Melastoma malabathricum L. and Melaleuca cajuputi Powell are dominant woody species that grow in tropical acid sulfate soils, and have been reported to be more tolerant to Al than rice. Surprisingly, the proportion of PM phospholipids in root cells of M. malabathricum and M. cajuputi was considerably low. Our present findings suggest that PM lipid composition plays an important role in Al tolerance mechanisms in various plant species.
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27
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Ligaba A, Dreyer I, Margaryan A, Schneider DJ, Kochian L, Piñeros M. Functional, structural and phylogenetic analysis of domains underlying the Al sensitivity of the aluminum-activated malate/anion transporter, TaALMT1. Plant J 2013; 76:766-80. [PMID: 24188189 DOI: 10.1111/tpj.12332] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 09/05/2013] [Accepted: 09/09/2013] [Indexed: 05/08/2023]
Abstract
Triticum aestivum aluminum-activated malate transporter (TaALMT1) is the founding member of a unique gene family of anion transporters (ALMTs) that mediate the efflux of organic acids. A small sub-group of root-localized ALMTs, including TaALMT1, is physiologically associated with in planta aluminum (Al) resistance. TaALMT1 exhibits significant enhancement of transport activity in response to extracellular Al. In this study, we integrated structure-function analyses of structurally altered TaALMT1 proteins expressed in Xenopus oocytes with phylogenic analyses of the ALMT family. Our aim is to re-examine the role of protein domains in terms of their potential involvement in the Al-dependent enhancement (i.e. Al-responsiveness) of TaALMT1 transport activity, as well as the roles of all its 43 negatively charged amino acid residues. Our results indicate that the N-domain, which is predicted to form the conductive pathway, mediates ion transport even in the absence of the C-domain. However, segments in both domains are involved in Al(3+) sensing. We identified two regions, one at the N-terminus and a hydrophobic region at the C-terminus, that jointly contribute to the Al-response phenotype. Interestingly, the characteristic motif at the N-terminus appears to be specific for Al-responsive ALMTs. Our study highlights the need to include a comprehensive phylogenetic analysis when drawing inferences from structure-function analyses, as a significant proportion of the functional changes observed for TaALMT1 are most likely the result of alterations in the overall structural integrity of ALMT family proteins rather than modifications of specific sites involved in Al(3+) sensing.
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Affiliation(s)
- Ayalew Ligaba
- Robert W. Holley Center for Agriculture and Health, Agricultural Research Service, US Department of Agriculture, Cornell University, Tower Road, Ithaca, NY, 14853, USA
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28
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Mohammed YSA, Eltayeb AE, Tsujimoto H. Enhancement of aluminum tolerance in wheat by addition of chromosomes from the wild relative Leymus racemosus. Breed Sci 2013; 63:407-416. [PMID: 24399913 PMCID: PMC3859352 DOI: 10.1270/jsbbs.63.407] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 09/27/2013] [Indexed: 06/03/2023]
Abstract
Aluminum (Al) toxicity is the key factor limiting wheat production in acid soils. Soil liming has been used widely to increase the soil pH, but due to its high cost, breeding tolerant cultivars is more cost-effective mean to mitigate the problem. Tolerant cultivars could be developed by traditional breeding, genetic transformation or introgression of genes from wild relatives. We used 30 wheat alien chromosome addition lines to identify new genetic resources to improve wheat tolerance to Al and to identify the chromosomes harboring the tolerance genes. We evaluated these lines and their wheat background Chinese Spring for Al tolerance in hydroponic culture at various Al concentrations. We also investigated Al uptake, oxidative stress and cell membrane integrity. The L. racemosus chromosomes A and E significantly enhanced the Al tolerance of the wheat in term of relative root growth. At the highest Al concentration tested (200 μM), line E had the greatest tolerance. The introgressed chromosomes did not affect Al uptake of the tolerant lines. We attribute the improved tolerance conferred by chromosome E to improved cell membrane integrity. Chromosome engineering with these two lines could produce Al-tolerant wheat cultivars.
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29
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Chen ZC, Yokosho K, Kashino M, Zhao FJ, Yamaji N, Ma JF. Adaptation to acidic soil is achieved by increased numbers of cis-acting elements regulating ALMT1 expression in Holcus lanatus. Plant J 2013; 76:10-23. [PMID: 23773148 DOI: 10.1111/tpj.12266] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 06/05/2013] [Accepted: 06/12/2013] [Indexed: 05/18/2023]
Abstract
Yorkshire fog (Holcus lanatus), which belongs to the Poaceae family and is a close relative of the agronomic crop oat (Avena sativa), is a widely adaptable grass species that is able to grow on highly acidic soils with high levels of Al, but the mechanism underlying the high Al tolerance is unknown. Here, we characterized two accessions of H. lanatus collected from an acid plot (soil pH 3.6, HL-A) and a neutral plot (pH 7.1, HL-N) in terms of Al tolerance, organic acid anion secretion and related gene expression. In response to Al (pH 4.5), the HL-A roots secreted approximately twice as much malate as the HL-N roots, but there was no difference in citrate secretion. Cloning of the gene HlALMT1 responsible for malate secretion showed that the encoded amino acid sequence did not differ between two accessions, but the expression level in the outer cell layers of the HL-A roots was twice as high as in the HL-N roots. This difference was not due to the genomic copy number, but was due to the number of cis-acting elements for an Al-responsive transcription factor (HlART1) in the promoter region of HlALMT1, as demonstrated by both a yeast one-hybrid assay and a transient assay in tobacco protoplasts. Furthermore, introduction of HlALMT1 driven by the HL-A promoter into rice resulted in significantly more Al-induced malate secretion than introduction of HlALMT1 driven by the HL-N promoter. These findings indicate that the adaptation of H. lanatus to acidic soils may be achieved by increasing number of cis-acting elements for ART1 in the promoter region of the HlALMT1 gene, enhancing the expression of HlALMT1 and the secretion of malate.
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Affiliation(s)
- Zhi Chang Chen
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan
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30
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Xia J, Yamaji N, Ma JF. A plasma membrane-localized small peptide is involved in rice aluminum tolerance. Plant J 2013; 76:345-55. [PMID: 23888867 DOI: 10.1111/tpj.12296] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 07/13/2013] [Accepted: 07/18/2013] [Indexed: 05/06/2023]
Abstract
A transcription factor for Al tolerance, ART1, regulates the expression of at least 30 genes in rice. Here we functionally characterized one of the downstream genes, OsCDT3, which encodes a predicted peptide of only 53 amino acid residues rich in cysteine. Knockdown of this gene resulted in decreased tolerance to Al, but did not affect the tolerance to Cd. The aluminum (Al) content in the root residues including cell wall and the plasma membrane of knockdown lines decreased, but the Al concentration in the root cell sap increased compared with those of the wild-type rice. OsCDT3 was mainly expressed in the roots and its expression was specifically induced by Al exposure, not by low pH and other metals. There was a small genotypic variation in OsCDT3 expression level, but no correlation between Al tolerance and the OsCDT3 variation was found among 17 rice cultivars. Analysis of pOsCDT3::GFP transgenic rice showed that OsCDT3 was expressed at all cells in the root tips. Transient expression of OsCDT3 fused with GFP at both N- and C-termini showed that OsCDT3 was anchored to the plasma membrane. Expression of OsCDT3 in yeast conferred tolerance to Al, but not to Cd. Furthermore, OsCDT3 did not show transport activity for Al in yeast, but was able to directly bind Al in vitro. Taken together, our results indicate that OsCDT3 anchoring to the plasma membrane may play a role in stopping entry of Al into the root cells by binding Al, therefore, contributing to high Al tolerance in rice.
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Affiliation(s)
- Jixing Xia
- Institute of Plant Science and Resources, Okayama University, Chuo 2-20-1, Kurashiki, Japan
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31
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Zhao XQ, Shen RF. Interactive regulation of nitrogen and aluminum in rice. Plant Signal Behav 2013; 8:e24355. [PMID: 23531694 PMCID: PMC3907435 DOI: 10.4161/psb.24355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Despite many studies on the high aluminum (Al) tolerance of rice (Oryza sativa), its exact mechanisms remain largely unknown. It is also unclear why Al improves growth of some plants. Our research on interactions between nitrogen (N) and Al may help to understand these phenomena. Previously, we found that ammonium-supplemented rice was more Al tolerant than nitrate-supplemented rice. Furthermore, Al-tolerant rice varieties preferred ammonium, while Al-sensitive ones preferred nitrate; in fact, Al tolerance was significantly correlated with the ammonium/nitrate preference among rice varieties. Al even enhanced growth of ammonium-supplemented rice, while it inhibited growth of nitrate-supplemented rice. Based on our own and other reports on N-Al interactions, we propose that intermediate products of N metabolism may play a role in rice Al tolerance. Al-enhanced ammonium utilization may explain why Al promotes growth of some plants, since Al often coexists with higher levels of ammonium than nitrate in acid soils.
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Melo JO, Lana UGP, Piñeros MA, Alves VMC, Guimarães CT, Liu J, Zheng Y, Zhong S, Fei Z, Maron LG, Schaffert RE, Kochian LV, Magalhaes JV. Incomplete transfer of accessory loci influencing SbMATE expression underlies genetic background effects for aluminum tolerance in sorghum. Plant J 2013; 73:276-88. [PMID: 22989115 DOI: 10.1111/tpj.12029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 09/10/2012] [Accepted: 09/13/2012] [Indexed: 05/08/2023]
Abstract
Impaired root development caused by aluminum (Al) toxicity is a major cause of grain yield reduction in crops cultivated on acid soils, which are widespread worldwide. In sorghum, the major Al-tolerance locus, AltSB , is due to the function of SbMATE, which is an Al-activated root citrate transporter. Here we performed a molecular and physiological characterization of various AltSB donors and near-isogenic lines harboring various AltSB alleles. We observed a partial transfer of Al tolerance from the parents to the near-isogenic lines that was consistent across donor alleles, emphasizing the occurrence of strong genetic background effects related to AltSB . This reduction in tolerance was variable, with a 20% reduction being observed when highly Al-tolerant lines were the AltSB donors, and a reduction as great as 70% when other AltSB alleles were introgressed. This reduction in Al tolerance was closely correlated with a reduction in SbMATE expression in near-isogenic lines, suggesting incomplete transfer of loci acting in trans on SbMATE. Nevertheless, AltSB alleles from the highly Al-tolerant sources SC283 and SC566 were found to retain high SbMATE expression, presumably via elements present within or near the AltSB locus, resulting in significant transfer of the Al-tolerance phenotype to the derived near-isogenic lines. Allelic effects could not be explained by coding region polymorphisms, although occasional mutations may affect Al tolerance. Finally, we report on the extensive occurrence of alternative splicing for SbMATE, which may be an important component regulating SbMATE expression in sorghum by means of the nonsense-mediated RNA decay pathway.
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Affiliation(s)
- Janaina O Melo
- Embrapa Maize and Sorghum, Road. MG 424, km 65, 35701-970, Sete Lagoas, Minas Gerais, Brazil
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Ubiraci G P Lana
- Embrapa Maize and Sorghum, Road. MG 424, km 65, 35701-970, Sete Lagoas, Minas Gerais, Brazil
- Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Miguel A Piñeros
- US Department of Agriculture - Agricultural Research Service, Robert W. Holley Center for Agriculture and Health, Cornell University, Ithaca, NY, 14853, USA
| | - Vera M C Alves
- Embrapa Maize and Sorghum, Road. MG 424, km 65, 35701-970, Sete Lagoas, Minas Gerais, Brazil
| | - Claudia T Guimarães
- Embrapa Maize and Sorghum, Road. MG 424, km 65, 35701-970, Sete Lagoas, Minas Gerais, Brazil
| | - Jiping Liu
- US Department of Agriculture - Agricultural Research Service, Robert W. Holley Center for Agriculture and Health, Cornell University, Ithaca, NY, 14853, USA
| | - Yi Zheng
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY, 14853, USA
| | - Silin Zhong
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY, 14853, USA
| | - Zhangjun Fei
- US Department of Agriculture - Agricultural Research Service, Robert W. Holley Center for Agriculture and Health, Cornell University, Ithaca, NY, 14853, USA
- Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY, 14853, USA
| | - Lyza G Maron
- US Department of Agriculture - Agricultural Research Service, Robert W. Holley Center for Agriculture and Health, Cornell University, Ithaca, NY, 14853, USA
| | - Robert E Schaffert
- Embrapa Maize and Sorghum, Road. MG 424, km 65, 35701-970, Sete Lagoas, Minas Gerais, Brazil
| | - Leon V Kochian
- US Department of Agriculture - Agricultural Research Service, Robert W. Holley Center for Agriculture and Health, Cornell University, Ithaca, NY, 14853, USA
| | - Jurandir V Magalhaes
- Embrapa Maize and Sorghum, Road. MG 424, km 65, 35701-970, Sete Lagoas, Minas Gerais, Brazil
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