A kiwifruit (Actinidia deliciosa) R2R3-MYB transcription factor modulates chlorophyll and carotenoid accumulation.

ABSTRACT: MYB transcription factors (TFs) regulate diverse plant developmental processes and understanding their roles in controlling pigment accumulation in fruit is important for developing new cultivars. In this study, we characterised kiwifruit TFMYB7, which was found to activate the promoter of the kiwifruit lycopene beta-cyclase (AdLCY-β) gene that plays a key role in the carotenoid biosynthetic pathway. To determine the role of MYB7, we analysed gene expression and metabolite profiles in Actinidia fruit which show different pigment profiles. The impact of MYB7 on metabolic biosynthetic pathways was then evaluated by overexpression in Nicotiana benthamiana followed by metabolite and gene expression analysis of the transformants. MYB7 was expressed in fruit that accumulated carotenoid and Chl p

SUBMITTER: Ampomah-Dwamena C 

PROVIDER: S-EPMC6585760 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature