FaTRAB1, a bZIP transcription factor, enhances anthocyanin biosynthesis in strawberry leaves via tissue-specific regulation.

ABSTRACT: The bZIP transcription factor FaTRAB1 has been extensively studied as a central regulator of plant adaptation to environmental stresses. However, its role in modulating anthocyanin biosynthesis remains unclear. This study reveals a novel function of FaTRAB1 in regulating anthocyanin accumulation in both strawberry leaves (Fragaria vesca 'Ruegen') and fruits (Fragaria × ananassa 'Benihoppe'). FaTRAB1 is a nucleocytoplasmic-localized protein, exhibiting relatively higher expression in leaves and small green fruits. Stable overexpression of FaTRAB1 in 'Ruegen' strawberry significantly enhanced anthocyanin levels in young, mature, and old leaves. Mass spectrometry and HPLC analysis identified three major anthocyanins in mature strawberry leaves: cyanidin-3-O-glucoside (C3G) and cyanidin-3,5-O-

SUBMITTER: Yang M 

PROVIDER: S-EPMC12494280 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature