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Ashraf MA, Akihiro T, Ito K, Kumagai S, Sugita R, Tanoi K, Rahman A. ATP binding cassette proteins ABCG37 and ABCG33 function as potassium-independent cesium uptake carriers in Arabidopsis roots. MOLECULAR PLANT 2021; 14:664-678. [PMID: 33588076 DOI: 10.1016/j.molp.2021.02.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 12/29/2020] [Accepted: 02/03/2021] [Indexed: 05/27/2023]
Abstract
Radiocesium accumulated in the soil by nuclear accidents is a major environmental concern. The transport process of cesium (Cs+) is tightly linked to the indispensable plant nutrient potassium (K+) as they both belong to the group I alkali metals with similar chemical properties. Most of the transporters that had been characterized to date as Cs+ transporters are directly or indirectly linked to K+. Using a combinatorial approach of physiology, genetics, cell biology, and root uptake assay, here we identified two ATP-binding cassette (ABC) proteins, ABCG37 and ABCG33, as facilitators of Cs+ influx. A gain-of-function mutant of ABCG37 (abcg37-1) showed increased sensitivity to Cs+-induced root growth inhibition, while the double knockout mutant of ABCG33 and ABCG37 (abcg33-1abcg37-2) showed resistance, whereas the single loss-of-function mutants of ABCG33 and ABCG37 did not show any alteration in Cs+ response. In planta short-term radioactive Cs+-uptake assay along with growth and uptake assays in a heterologous system confirmed ABCG33 and ABCG37 as Cs+-uptake carriers. Potassium response and content were unaffected in the double-mutant background and yeast cells lacking potassium-uptake carriers transformed with ABCG33 and ABCG37 failed to grow in the absence of K+, confirming that Cs+ uptake by ABCG33 and ABCG37 is independent of K+. Collectively, this work identified two ABC proteins as new Cs+-influx carriers that act redundantly and independent of the K+-uptake pathway.
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Affiliation(s)
- Mohammad Arif Ashraf
- United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Takashi Akihiro
- Faculty of Life and Environmental Science, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Keita Ito
- Faculty of Agriculture, Department of Plant Bio Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Sayaka Kumagai
- Faculty of Agriculture, Department of Plant Bio Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Ryohei Sugita
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8654, Japan
| | - Keitaro Tanoi
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8654, Japan; PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Abidur Rahman
- United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Faculty of Agriculture, Department of Plant Bio Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Agri-Innovation, Iwate University, Morioka, Iwate 020-8550, Japan.
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Zhou J, Zhou HJ, Chen P, Zhang LL, Zhu JT, Li PF, Yang J, Ke YZ, Zhou YH, Li JN, Du H. Genome-Wide Survey and Expression Analysis of the KT/HAK/KUP Family in Brassica napus and Its Potential Roles in the Response to K + Deficiency. Int J Mol Sci 2020; 21:ijms21249487. [PMID: 33322211 PMCID: PMC7763660 DOI: 10.3390/ijms21249487] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/10/2020] [Accepted: 12/11/2020] [Indexed: 11/16/2022] Open
Abstract
The KT/HAK/KUP (HAK) family is the largest potassium (K+) transporter family in plants, which plays key roles in K+ uptake and homeostasis, stress resistance, and root and embryo development. However, the HAK family has not yet been characterized in Brassica napus. In this study, 40 putative B. napus HAK genes (BnaHAKs) are identified and divided into four groups (Groups I–III and V) on the basis of phylogenetic analysis. Gene structure analysis revealed 10 conserved intron insertion sites across different groups. Collinearity analysis demonstrated that both allopolyploidization and small-scale duplication events contributed to the large expansion of BnaHAKs. Transcription factor (TF)-binding network construction, cis-element analysis, and microRNA prediction revealed that the expression of BnaHAKs is regulated by multiple factors. Analysis of RNA-sequencing data further revealed extensive expression profiles of the BnaHAKs in groups II, III, and V, with limited expression in group I. Compared with group I, most of the BnaHAKs in groups II, III, and V were more upregulated by hormone induction based on RNA-sequencing data. Reverse transcription-quantitative polymerase reaction analysis revealed that the expression of eight BnaHAKs of groups I and V was markedly upregulated under K+-deficiency treatment. Collectively, our results provide valuable information and key candidate genes for further functional studies of BnaHAKs.
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Affiliation(s)
- Jie Zhou
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
| | - Hong-Jun Zhou
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
| | - Ping Chen
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
| | - Lan-Lan Zhang
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
| | - Jia-Tian Zhu
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
| | - Peng-Feng Li
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
| | - Jin Yang
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
| | - Yun-Zhuo Ke
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
| | - Yong-Hong Zhou
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
| | - Jia-Na Li
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
- Correspondence: (J.-N.L.); or (H.D.); Tel.: +86-1822-348-0008 (H.D.)
| | - Hai Du
- College of Agronomy and Biotechnology, Southwest University, Chongqing 400716, China; (J.Z.); (H.-J.Z.); (P.C.); (L.-L.Z.); (J.-T.Z.); (P.-F.L.); (J.Y.); (Y.-Z.K.); (Y.-H.Z.)
- Academy of Agricultural Sciences, Southwest University, Chongqing 400716, China
- Correspondence: (J.-N.L.); or (H.D.); Tel.: +86-1822-348-0008 (H.D.)
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Šustr M, Doksanská T, Doležalová B, Soukup A, Tylová E. 134Cs Uptake and Growth at Various Cs + and K + Levels in Arabidopsis AtKUP7 Mutants. PLANTS (BASEL, SWITZERLAND) 2020; 9:E1525. [PMID: 33182498 PMCID: PMC7696183 DOI: 10.3390/plants9111525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/06/2020] [Accepted: 11/07/2020] [Indexed: 11/16/2022]
Abstract
Radiocaesium is a pollutant with a high risk for the environment, agricultural production, and human health. It is mobile in ecosystems and can be taken up by plants via potassium transporters. In this study, we focused on the role of potassium transporter AtKUP7 of the KT/HAK/KUP family in Cs+ and K+ uptake by plants and in plant tolerance to caesium toxicity. We detected that Arabidopsiskup7 mutant accumulates significantly lower amounts of 134Cs in the root (86%) and in the shoot (69%) compared to the wild-type. On the other hand ability of the mutant to grow on media with toxic (100 and 200 µM) concentrations of Cs+ was not changed; moreover its growth was not impaired on low K+. We further investigated another mutant line in AtKUP7 and found that the growth phenotype of the kup7 mutants in K+ deficient conditions is much milder than previously published. Also, their accumulation of K+ in shoots is hindered only by severe potassium shortage.
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Affiliation(s)
- Marek Šustr
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Viničná 5, 128 44 Prague 2, Czech Republic; (M.Š.); (B.D.); (A.S.)
| | - Tereza Doksanská
- National Radiation Protection Institute, Bartoškova 28, 140 00 Prague 4, Czech Republic;
| | - Barbora Doležalová
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Viničná 5, 128 44 Prague 2, Czech Republic; (M.Š.); (B.D.); (A.S.)
| | - Aleš Soukup
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Viničná 5, 128 44 Prague 2, Czech Republic; (M.Š.); (B.D.); (A.S.)
| | - Edita Tylová
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Viničná 5, 128 44 Prague 2, Czech Republic; (M.Š.); (B.D.); (A.S.)
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Nieves-Cordones M, Lara A, Silva M, Amo J, Rodriguez-Sepulveda P, Rivero RM, Martínez V, Botella MA, Rubio F. Root high-affinity K + and Cs + uptake and plant fertility in tomato plants are dependent on the activity of the high-affinity K + transporter SlHAK5. PLANT, CELL & ENVIRONMENT 2020; 43:1707-1721. [PMID: 32275780 DOI: 10.1111/pce.13769] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/27/2020] [Accepted: 03/29/2020] [Indexed: 06/11/2023]
Abstract
Root K+ acquisition is a key process for plant growth and development, extensively studied in the model plant Arabidopsis thaliana. Because important differences may exist among species, translational research supported by specific studies is needed in crops such as tomato. Here we present a reverse genetics study to demonstrate the role of the SlHAK5 K+ transporter in tomato K+ nutrition, Cs+ accumulation and its fertility. slhak5 KO lines, generated by CRISPR-Cas edition, were characterized in growth experiments, Rb+ and Cs+ uptake tests and root cells K+ -induced plasma membrane depolarizations. Pollen viability and its K+ accumulation capacity were estimated by using the K+ -sensitive dye Ion Potassium Green 4. SlHAK5 is the major system for high-affinity root K+ uptake required for plant growth at low K+ , even in the presence of salinity. It also constitutes a pathway for Cs+ entry in tomato plants with a strong impact on fruit Cs+ accumulation. SlHAK5 also contributes to pollen K+ uptake and viability and its absence produces almost seedless fruits. Knowledge gained into SlHAK5 can serve as a model for other crops with fleshy fruits and it can help to generate tools to develop low Cs+ or seedless fruits crops.
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Affiliation(s)
- Manuel Nieves-Cordones
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, Spain
| | - Alberto Lara
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, Spain
| | - Martha Silva
- Instituto Tecnológico Chascomús (INTECH), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Universidad Nacional de San Martín (UNSAM), Chascomús, Argentina
| | - Jesús Amo
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, Spain
| | | | - Rosa M Rivero
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, Spain
| | - Vicente Martínez
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, Spain
| | - M Angeles Botella
- Departamento de Biología Aplicada, Universidad Miguel Hernández, Alicante, Spain
| | - Francisco Rubio
- Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura-CSIC, Murcia, Spain
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5
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Ragel P, Raddatz N, Leidi EO, Quintero FJ, Pardo JM. Regulation of K + Nutrition in Plants. FRONTIERS IN PLANT SCIENCE 2019; 10:281. [PMID: 30949187 PMCID: PMC6435592 DOI: 10.3389/fpls.2019.00281] [Citation(s) in RCA: 130] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 02/20/2019] [Indexed: 05/17/2023]
Abstract
Modern agriculture relies on mineral fertilization. Unlike other major macronutrients, potassium (K+) is not incorporated into organic matter but remains as soluble ion in the cell sap contributing up to 10% of the dry organic matter. Consequently, K+ constitutes a chief osmoticum to drive cellular expansion and organ movements, such as stomata aperture. Moreover, K+ transport is critical for the control of cytoplasmic and luminal pH in endosomes, regulation of membrane potential, and enzyme activity. Not surprisingly, plants have evolved a large ensemble of K+ transporters with defined functions in nutrient uptake by roots, storage in vacuoles, and ion translocation between tissues and organs. This review describes critical transport proteins governing K+ nutrition, their regulation, and coordinated activity, and summarizes our current understanding of signaling pathways activated by K+ starvation.
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Affiliation(s)
- Paula Ragel
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, Seville, Spain
- Centre for Organismal Studies, Universität Heidelberg, Heidelberg, Germany
| | - Natalia Raddatz
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, Seville, Spain
| | - Eduardo O. Leidi
- Instituto de Recursos Naturales y Agrobiologia de Sevilla, Consejo Superior de Investigaciones Cientificas, Seville, Spain
| | - Francisco J. Quintero
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, Seville, Spain
| | - José M. Pardo
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, Seville, Spain
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Ragel P, Raddatz N, Leidi EO, Quintero FJ, Pardo JM. Regulation of K + Nutrition in Plants. FRONTIERS IN PLANT SCIENCE 2019. [PMID: 30949187 DOI: 10.3389/fpls.2019.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Modern agriculture relies on mineral fertilization. Unlike other major macronutrients, potassium (K+) is not incorporated into organic matter but remains as soluble ion in the cell sap contributing up to 10% of the dry organic matter. Consequently, K+ constitutes a chief osmoticum to drive cellular expansion and organ movements, such as stomata aperture. Moreover, K+ transport is critical for the control of cytoplasmic and luminal pH in endosomes, regulation of membrane potential, and enzyme activity. Not surprisingly, plants have evolved a large ensemble of K+ transporters with defined functions in nutrient uptake by roots, storage in vacuoles, and ion translocation between tissues and organs. This review describes critical transport proteins governing K+ nutrition, their regulation, and coordinated activity, and summarizes our current understanding of signaling pathways activated by K+ starvation.
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Affiliation(s)
- Paula Ragel
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, Seville, Spain
- Centre for Organismal Studies, Universität Heidelberg, Heidelberg, Germany
| | - Natalia Raddatz
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, Seville, Spain
| | - Eduardo O Leidi
- Instituto de Recursos Naturales y Agrobiologia de Sevilla, Consejo Superior de Investigaciones Cientificas, Seville, Spain
| | - Francisco J Quintero
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, Seville, Spain
| | - José M Pardo
- Instituto de Bioquímica Vegetal y Fotosíntesis, Consejo Superior de Investigaciones Científicas y Universidad de Sevilla, Seville, Spain
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