SlMYB72 and SlMYB75 antagonistically regulate trichome formation via the MYB-bHLH-WD40 complex in tomato.

ABSTRACT: Trichomes are specialized epidermal outgrowths serving as protective barriers for plants against various stresses such as herbivore attacks. MYB-bHLH-WD40 complex is of great significance for unicellular trichome formation in Arabidopsis, whereas its role in the formation of multicellular trichomes in tomatoes remains largely unknown. In the present study, we identified that the R2R3-type MYB transcription factor SlMYB72 promotes the formation of type II, V, and VI trichomes by inhibiting the expression of SlCycB2, a repressor of trichome initiation. SlMYB75 is a negative regulator of trichome formation and positively regulates SlCycB2 expression. Interaction analyses showed that SlMYB72 and SlMYB75 can form MYB-bHLH-WD40 complexes with SlbHLH150 and SlTTG1, respectively, through mutual in

SUBMITTER: Qi T 

PROVIDER: S-EPMC11968270 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature