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https://hdl.handle.net/2440/131715
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dc.contributor.author | Feng, C.-Z. | - |
dc.contributor.author | Luo, Y.-X. | - |
dc.contributor.author | Wang, P.-D. | - |
dc.contributor.author | Gilliham, M. | - |
dc.contributor.author | Long, Y. | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | New Phytologist, 2021; 232(1):1-14 | - |
dc.identifier.issn | 0028-646X | - |
dc.identifier.issn | 1469-8137 | - |
dc.identifier.uri | http://hdl.handle.net/2440/131715 | - |
dc.description.abstract | In Arabidopsis, the High-affinity K+ transporter HAK5 is the major pathway for root K+ uptake when below 100 μM; HAK5 responds to Low-K+ (LK) stress by strongly and rapidly increasing its expression during K+ -deficiency. Therefore, positive regulators of HAK5 expression have the potential to improve K+ uptake under LK. Here, we show that mutants of the transcription factor MYB77 share a LK-induced leaf chlorosis phenotype, lower K+ content, and lower Rb+ uptake of the hak5 mutant, but not the shorter root growth, and that overexpression of MYB77 enhanced K+ uptake and improved tolerance to LK stress. Further, we demonstrate that MYB77 positively regulates the expression of HAK5, by binding to the HAK5 promoter and enhances high-affinity K+ uptake of roots. As such, our results reveal a novel pathway for enhancing HAK5 expression under LK stress, and provides a candidate for increasing the tolerance of plants to LK. | - |
dc.description.statementofresponsibility | Cui-zhu Feng, Yun-xin Luo, Peng-dan Wang, Matthew Gilliham, Yu Long | - |
dc.language.iso | en | - |
dc.publisher | Wiley | - |
dc.rights | © 2021 The Authors. New Phytologist © 2021 New Phytologist Foundatio | - |
dc.source.uri | http://dx.doi.org/10.1111/nph.17589 | - |
dc.subject | HAK5 | - |
dc.subject | High-affinity K+ uptake | - |
dc.subject | MYB77 | - |
dc.subject | Transcription factor | - |
dc.subject | leaf chlorosis | - |
dc.title | MYB77 regulates high-affinity potassium uptake by promoting expression of HAK5 | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1111/nph.17589 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/CE140100008 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Gilliham, M. [0000-0003-0666-3078] | - |
Appears in Collections: | Aurora harvest 4 Environment Institute publications |
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