RrMYB5- and RrMYB10-regulated flavonoid biosynthesis plays a pivotal role in feedback loop responding to wounding and oxidation in Rosa rugosa.

ABSTRACT: Flavonoids play critical roles in plant responses to various stresses. Few studies have been reported on what the mechanism of activating flavonoid biosynthesis in plant responses to wounding and oxidation is. In this study, flavonoid metabolites and many MYB transcript factors from Rosa rugosa were verified to be induced by wounding and oxidation. RrMYB5 and RrMYB10, which belong to PA1- and TT2-type MYB TFs, respectively, showed extremely high induction. Overexpression of RrMYB5 and RrMYB10 resulted in an increased accumulation of proanthocyanidins in R. rugosa and tobacco by promoting the expression of flavonoid structural genes. Transcriptomic analysis of the transgenic plants showed that most genes, involved in wounding and oxidation response and ABA signalling modulation, were up-reg

SUBMITTER: Shen Y 

PROVIDER: S-EPMC6790370 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature