Winter warming post floral initiation delays flowering via bud dormancy activation and affects yield in a winter annual crop.

ABSTRACT: Winter annual life history is conferred by the requirement for vernalization to promote the floral transition and control the timing of flowering. Here we show using winter oilseed rape that flowering time is controlled by inflorescence bud dormancy in addition to vernalization. Winter warming treatments given to plants in the laboratory and field increase flower bud abscisic acid levels and delay flowering in spring. We show that the promotive effect of chilling reproductive tissues on flowering time is associated with the activity of two FLC genes specifically silenced in response to winter temperatures in developing inflorescences, coupled with activation of a BRANCHED1-dependent bud dormancy transcriptional module. We show that adequate winter chilling is required for normal infloresce

SUBMITTER: Lu X 

PROVIDER: S-EPMC9522361 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature