Arabidopsis CYCD3 D-type cyclins link cell proliferation and endocycles and are rate-limiting for cytokinin responses.

ABSTRACT: Current understanding of the integration of cell division and expansion in the development of plant lateral organs such as leaves is limited. Cell number is established during a mitotic phase, and subsequent growth into a mature organ relies primarily on cell expansion accompanied by endocycles. Here we show that the three Arabidopsis cyclin D3 (CYCD3) genes are expressed in overlapping but distinct patterns in developing lateral organs and the shoot meristem. Triple loss-of-function mutants show that CYCD3 function is essential neither for the mitotic cell cycle nor for morphogenesis. Rather, analysis of mutant and reciprocal overexpression phenotypes shows that CYCD3 function contributes to the control of cell number in developing leaves by regulating the duration of the mitotic phase an

SUBMITTER: Dewitte W 

PROVIDER: S-EPMC1964848 | biostudies-literature | 2007 Sep

REPOSITORIES: biostudies-literature