Integrative analysis of transcriptome and metabolome revealed the mechanisms by which flavonoids and phytohormones regulated the adaptation of alfalfa roots to NaCl stress

Frontiers in Plant Science

Plant Science

Juncheng Yin¹  Junhao Li¹  Xiaoshan Wang¹  Jing Wang¹ 

[1] Department of Grassland Science, College of Animal Science and Technology, Yangzhou University, Yangzhou, China;

关键词: flavonoid;    Medicago sativa;    metabolome;    NaCl stress;    plant hormones;    transcriptome;   

DOI  :  10.3389/fpls.2023.1117868

 received in 2022-12-07, accepted in 2023-01-16,  发布年份 2023

来源: Frontiers

【 摘 要 】

IntroductionSalinity critically affects the growth and development of alfalfa (Medicago sativa), making it necessary to understand the molecular mechanism of alfalfa’s adaptation to salt stress.MethodsIn this study, alfalfa roots were subjected to salt stress and transcriptomics and metabolomics analyses were performed.ResultsThe results showed that flavonoid synthesis, hormone synthesis, and transduction pathways may be involved in the alfalfa salt stress adaptation reaction, and that they are related. Combined analysis of differential genes and differential metabolites found that dihydroquercetin and beta-ring hydroxylase (LUT5), ABA responsive element binding factor 2 (ABF2), protein phosphatase PP2C (PP2C) and abscisic acid (ABA) receptor PYL2 (PYL), luteolinidin was significantly correlated with PP2C and phytochrome-interacting factor 4 (PIF4) and (+)-7-isomethyl jasmonate were significantly correlated with flavonol synthase (FLS) gene. (+)-7-isomethyl jasmonate and homoeriodictyol chalcone were significantly correlated with peroxidase (POD). POD was significantly up-regulated under NaCl stress for 6 and 24 h. Moreover, flavonoids, gibberellin (GA), jasmonic acid (JA) and ABA were suggested to play an important role in alfalfa’s response to salt stress. Further, GA,ABA, and JA may be involved in the regulation of flavonoids to improve alfalfa’s salt tolerance, and JA may be a key signal to promote the synthesis of flavonoids. DiscussionThis study revealed the possible molecular mechanism of alfalfa adaptation to salt stress, and identified a number of salt-tolerance candidate genes from the synthesis and signal transduction pathways of flavonoids and plant hormones, providing new insights into the regulatory network of alfalfa response to salt stress.

【 授权许可】

Unknown   
Copyright © 2023 Wang, Yin, Wang and Li