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|a 10.1093/jxb/eraf152
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|a eng
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|a Shabala, Sergey
|e verfasserin
|4 aut
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|a Salinity tolerance in wheat
|b rethinking the targets
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|c 2025
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|a Text
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|a Date Revised 09.04.2025
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a © The Author(s) 2025. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For commercial re-use, please contact reprintsoup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com.
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|a Wheat is the major staple food in the human diet but its production under current climate scenarios is problematic, giving the predicted extent of land salinization and the fact that wheat is highly sensitive to soil salinity. This work aims to critically assess previous breeding efforts and pros- and cons- of targeting SOS1 and HKT1 genes to improve salinity stress tolerance in wheat. We argue that overexpressing SOS1 genes encoding Na+/H+ exchangers for Na+ removal from root to the rhizosphere may come with a caveat of increased loading of Na+ into the xylem and its delivery to the shoot, as well as numerous pleiotropic effects. Similarly, targeting HKT1 transporters for removing Na+ from the shoot comes with significant yield penalties due to the high carbon cost for osmotic adjustment; this strategy is also limited by the relatively small capacity of the root to store excessive Na+ without experiencing toxicity symptoms. We suggest that targeting tissue tolerance traits such as K+ retention in mesophyll and vacuolar Na+ sequestration in the shoot will be able to deliver better outcomes. We also call for a better understanding of the structure-function relationships of various isoforms for key genes involved in maintenance of Na+ and K+ homeostasis and a need for more in-depth physiological studies of wheat species with DD genome; a key contributor to tissue tolerance traits. Our arguments are supported by the bioinformatic analysis of the number of orthologs for some key gene between hexaploidy (AABBDD) and tetraploid (AABB) wheats and their structural differences
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|a Journal Article
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|a Chen, Xi
|e verfasserin
|4 aut
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|a Yun, Ping
|e verfasserin
|4 aut
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|a Zhou, Meixue
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g (2025) vom: 09. Apr.
|w (DE-627)NLM098182706
|x 1460-2431
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|g year:2025
|g day:09
|g month:04
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|u http://dx.doi.org/10.1093/jxb/eraf152
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