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转录组学和代谢组学分析表明，ABA 显著增加了水稻的耐盐性，与茉莉酸生物合成和类黄酮生物合成密切相关。

Transcriptomic and metabolomic analyses reveal that ABA increases the salt tolerance of rice significantly correlated with jasmonic acid biosynthesis and flavonoid biosynthesis.

机构信息

College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China.

Shenzhen Research Institute of Guangdong Ocean University, Shenzhen, 518108, China.

出版信息

Sci Rep. 2023 Nov 21;13(1):20365. doi: 10.1038/s41598-023-47657-w.

DOI:10.1038/s41598-023-47657-w
PMID:37990109
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10663488/
Abstract

Abscisic acid (ABA) has been shown to mitigate the deleterious effects of abiotic stresses and to regulate plant growth and development. Salinity is one of the important abiotic stresses affecting plant cell metabolism and physiology, which causes serious damages to crops. In this study, we investigated the protective role of exogenous ABA on leaves in response to salinity stress using rice seedlings (two leaf-one heart) subjected to three treatments: ZCK (control), ZS (50 mM NaCl), and ZSA (5 mg L ABA + 50 mM NaCl). We carried out transcriptomic and metabolomic analyses to identify the molecular mechanisms by which ABA protects plants against salt stress. Results showed that 1159 differentially expressed genes (DEGs) (916 up-regulated, 243 down-regulated) and 63 differentially accumulated metabolites (DAMs) (42 up-regulated, 21 down-regulated) were identified between the ZS and ZSA treatments, respectively. In addition, ABA pretreatment regulated the expression pattern of genes responsible for oxidation redox, starch and sucrose metabolism, and phenylpropanoid biosynthesis. The combined transcriptomic and metabolomic analysis revealed that 16 DEGs and 2 DAMs were involved in Flavonoid biosynthesis and 8 DEGs and 2 DAMs were involved alpha-Linolenic acid metabolism which are responsible for salinity stress tolerance through induced by exogenous ABA. Overall, ABA could enhance rice leaves growth and development mainly by regulating flavonoid biosynthesis and linoleic acid metabolism pathway.

摘要

脱落酸（ABA）已被证明可以减轻非生物胁迫对植物的有害影响，并调节植物的生长和发育。盐度是影响植物细胞代谢和生理的重要非生物胁迫之一，它会对作物造成严重损害。在这项研究中，我们使用水稻幼苗（两片叶一心）研究了外源 ABA 对盐胁迫下叶片的保护作用，幼苗分为三组：ZCK（对照）、ZS（50mM NaCl）和 ZSA（5mg L ABA+50mM NaCl）。我们进行了转录组和代谢组分析，以确定 ABA 保护植物免受盐胁迫的分子机制。结果表明，ZS 和 ZSA 处理之间分别鉴定出 1159 个差异表达基因（DEGs）（916 个上调，243 个下调）和 63 个差异积累代谢物（DAMs）（42 个上调，21 个下调）。此外，ABA 预处理调节了与氧化还原、淀粉和蔗糖代谢以及苯丙烷生物合成相关的基因的表达模式。转录组和代谢组联合分析表明，16 个 DEGs 和 2 个 DAMs 参与黄酮类生物合成，8 个 DEGs 和 2 个 DAMs 参与α-亚麻酸代谢，它们通过外源 ABA 诱导参与盐胁迫耐受。总的来说，ABA 可以通过调节类黄酮生物合成和亚麻酸代谢途径来增强水稻叶片的生长和发育。

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