Regulation of tomato fruit elongation by transcription factor BZR1.7 through promotion of SUN gene expression.

ABSTRACT: Fruit shape is an important biological trait that is also of special commercial value in tomato. The SUN gene has been known as a key regulator of tomato fruit elongation for years, but the molecular mechanisms underlying its transcriptional regulation remain little understood. Here, a unique BZR1-like transcription factor, BZR1.7, was identified as a trans-acting factor of the SUN gene promoter that bound to the conserved E-box of the promoter to promote SUN gene expression. Overexpression of BZR1.7 in tomato led to elevated SUN gene expression and formation of elongated fruits. Plants of the BZR1.7 knockout mutant created by gene editing did not exhibit an observable fruit shape phenotype, suggesting possible functional redundancy of BZ

SUBMITTER: Yu T 

PROVIDER: S-EPMC9347012 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature