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Climate-resilient crops: Lessons from xerophytes

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dc.contributor.authorChen, X.
dc.contributor.authorZhao, C.
dc.contributor.authorYun, P.
dc.contributor.authorYu, M.
dc.contributor.authorZhou, M.
dc.contributor.authorChen, Z.H.
dc.contributor.authorShabala, S.
dc.date.issued2024
dc.description.abstractDeveloping climate-resilient crops is critical for future food security and sustainable agriculture under current climate scenarios. Of specific importance are drought and soil salinity. Tolerance traits to these stresses are highly complex, and the progress in improving crop tolerance is too slow to cope with the growing demand in food production unless a major paradigm shift in crop breeding occurs. In this work, we combined bioinformatics and physiological approaches to compare some of the key traits that may differentiate between xerophytes (naturally drought-tolerant plants) and mesophytes (to which the majority of the crops belong). We show that both xerophytes and salt-tolerant mesophytes have a much larger number of copies in key gene families conferring some of the key traits related to plant osmotic adjustment, abscisic acid (ABA) sensing and signalling, and stomata development. We show that drought and salt-tolerant species have (i) higher reliance on Na for osmotic adjustment via more diversified and efficient operation of Na⁺/H⁺ tonoplast exchangers (NHXs) and vacuolar H⁺- pyrophosphatase (VPPases); (ii) fewer and faster stomata; (iii) intrinsically lower ABA content; (iv) altered structure of pyrabactin resistance/pyrabactin resistance-like (PYR/PYL) ABA receptors; and (v) higher number of gene copies for protein phosphatase 2C (PP2C) and sucrose non-fermenting 1 (SNF1)-related protein kinase 2/open stomata 1 (SnRK2/OST1) ABA signalling components. We also show that the past trends in crop breeding for Na⁺ exclusion to improve salinity stress tolerance are counterproductive and compromise their drought tolerance. Incorporating these genetic insights into breeding practices could pave the way for more drought-tolerant and salt-resistant crops, securing agricultural yields in an era of climate unpredictability.
dc.description.statementofresponsibilityXi Chen, Chenchen Zhao, Ping Yun, Min Yu, Meixue Zhou, Zhong-Hua Chen, and Sergey Shabala
dc.identifier.citationThe Plant Journal, 2024; 117(6):1815-1835
dc.identifier.doi10.1111/tpj.16549
dc.identifier.issn0960-7412
dc.identifier.issn1365-313X
dc.identifier.orcidChen, Z.H. [0000-0002-7531-320X]
dc.identifier.urihttps://hdl.handle.net/2440/147213
dc.language.isoen
dc.publisherWiley
dc.relation.granthttp://purl.org/au-research/grants/arc/DP220101795
dc.relation.granthttp://purl.org/au-research/grants/arc/FT210100366
dc.rights© 2023 The Authors. The Plant Journal published by Society for Experimental Biology and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
dc.source.urihttps://doi.org/10.1111/tpj.16549
dc.subjectclimate-resilient crops; drought stress; xerophytes; Na(+)/H(+) tonoplast exchangers; abscisic acid; stomata; salinity; evolutionary analysis.
dc.subject.meshAbscisic Acid
dc.subject.meshCrops, Agricultural
dc.subject.meshDroughts
dc.subject.meshNaphthalenes
dc.subject.meshPlant Breeding
dc.subject.meshSulfonamides
dc.titleClimate-resilient crops: Lessons from xerophytes
dc.typeJournal article
pubs.publication-statusPublished

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