Plum Fruit Development Occurs via Gibberellin-Sensitive and -Insensitive DELLA Repressors.

ABSTRACT: Fruit growth depends on highly coordinated hormonal activities. The phytohormone gibberellin (GA) promotes growth by triggering degradation of the growth-repressing DELLA proteins; however, the extent to which such proteins contribute to GA-mediated fruit development remains to be clarified. Three new plum genes encoding DELLA proteins, PslGAI, PslRGL and PslRGA were isolated and functionally characterized. Analysis of expression profile during fruit development suggested that PslDELLA are transcriptionally regulated during flower and fruit ontogeny with potential positive regulation by GA and ethylene, depending on organ and developmental stage. PslGAI and PslRGL deduced proteins contain all domains present in typical DELLA proteins. However, PslRGA exhibited a degenerated DELLA domain an

SUBMITTER: El-Sharkawy I 

PROVIDER: S-EPMC5226729 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature