期刊
PLANT PHYSIOLOGY AND BIOCHEMISTRY
卷 168, 期 -, 页码 410-422出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2021.10.022
关键词
Pigeon pea; Transcriptome analysis; Methyl jasmonate; Flavonoid metabolism
资金
- National Natural Science Foundation of China [31800509, 31922058, 31930076, 31901281, 32171742]
- Outstanding Young Talent Fund in Beijing Forestry University [2019JQ03009]
- Natural Science Foundation of Beijing [6212023]
The study demonstrates that MeJA can promote the synthesis of flavonoids in pigeon pea, thereby enhancing its ability to resist fungal infections. This provides a basis for further research on flavonoid-mediated defense responses.
Flavonoids are important metabolites of pigeon pea in relation to its stress resistance. However, the molecular basis and regulatory mechanisms of flavonoids in pigeon pea remain unclear. Methyl jasmonate (MeJA) is a signaling molecule associated with biosynthesis of flavonoids. In this study, after exogenous treatment of 10 mg/ L MeJA, infection of pathogenic fungi to pigeon pea was alleviated and the content of flavonoids was increased. Results of gene expression and metabolic changes that were respectively analyzed by transcriptome sequencing and high performance liquid chromatography (HPLC) showed that (1) concentrations of various flavonoids, such as genistein, apigenin, vitexin and biochanin A were significantly up-regulated; (2) 13675 differentially expressed genes were produced, mainly enriched in signal transduction and isoflavone biosynthesis pathways: (3) the expression levels of key synthase genes (CcI2 ' H, CcHIDH, Cc7-IOMT) in the flavonoid biosynthesis pathway were significantly up-regulated; (4) Overexpression of CcbHLH35 significantly induced upregulation of flavonoid synthase genes and accumulation of genistein, vitexin and apigenin. Our findings reveals the pivotal roles of MeJA in synthesis and functioning of flavonoids in pigeon pea, which provide a basis for further studies on flavonoid-mediated defense responses.
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