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dc.contributor.authorQu, Y.-
dc.contributor.authorGuan, R.-
dc.contributor.authorBose, J.-
dc.contributor.authorHenderson, S.W.-
dc.contributor.authorWege, S.-
dc.contributor.authorQiu, L.-
dc.contributor.authorGilliham, M.-
dc.identifier.citationPlant, Cell and Environment, 2021; 44(3):856-869-
dc.description.abstractSoybean (Glycine max) yields are threatened by multiple stresses including soil salinity. GmSALT3 (a cation-proton exchanger protein) confers net shoot exclusion for both Na⁺ and Cl⁻ and improves salt tolerance of soybean; however, how the ER-localised GmSALT3 achieves this is unknown. Here, GmSALT3's function was investigated in heterologous systems and near-isogenic lines that contained the full-length GmSALT3 (NIL-T; salt-tolerant) or a truncated transcript Gmsalt3 (NIL-S; salt-sensitive). GmSALT3 restored growth of K⁺ -uptake-defective E. coli and contributed toward net influx and accumulation of Na⁺ , K⁺ , and Cl⁻ in Xenopus laevis oocytes, while Gmsalt3 was non-functional. Time-course analysis of NILs confirmed shoot Cl⁻ exclusion occurs distinctly from Na⁺ exclusion. Grafting showed that shoot Na⁺ exclusion occurs via a root xylem-based mechanism; in contrast, NIL-T plants exhibited significantly greater Cl⁻ content in both the stem xylem and phloem sap compared to NIL-S, indicating that shoot Cl⁻ exclusion likely depends upon novel phloem-based Cl⁻ recirculation. NIL-T shoots grafted on NIL-S roots contained low shoot Cl⁻ , which confirmed that Cl⁻ recirculation is dependent on the presence of GmSALT3 in shoots. Overall, these findings provide new insights on GmSALT3's impact on salinity tolerance and reveal a novel mechanism for shoot Cl⁻ exclusion in plants.-
dc.description.statementofresponsibilityYue Qu, Rongxia Guan, Jayakumar Bose, Sam W. Henderson, Stefanie Wege, Lijuan Qiu, Matthew Gilliham-
dc.rights© 2020 John Wiley & Sons Ltd-
dc.subjectAbiotic stress; CHX; ion transporter; salinity tolerance; shoot ion exclusion-
dc.titleSoybean CHX-type ion transport protein GmSALT3 confers leaf Na⁺ exclusion via a root derived mechanism, and Cl⁻ exclusion via a shoot derived process-
dc.title.alternativeSoybean CHX-type ion transport protein GmSALT3 confers leaf Na(+) exclusion via a root derived mechanism, and Cl(-) exclusion via a shoot derived process-
dc.typeJournal article-
dc.identifier.orcidQu, Y. [0000-0003-0101-1097]-
dc.identifier.orcidBose, J. [0000-0002-0565-2951]-
dc.identifier.orcidHenderson, S.W. [0000-0003-3019-1891]-
dc.identifier.orcidWege, S. [0000-0002-7232-5889]-
dc.identifier.orcidGilliham, M. [0000-0003-0666-3078]-
Appears in Collections:Agriculture, Food and Wine publications
Aurora harvest 4

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