Auxin transport through PIN-FORMED 3 (PIN3) controls shade avoidance and fitness during competition.

ABSTRACT: Plants grow in dense vegetations at the risk of being out-competed by neighbors. To increase their competitive power, plants display adaptive responses, such as rapid shoot elongation (shade avoidance) to consolidate light capture. These responses are induced upon detection of proximate neighbors through perception of the reduced ratio between red (R) and far-red (FR) light that is typical for dense vegetations. The plant hormone auxin is a central regulator of plant development and plasticity, but until now it has been unknown how auxin transport is controlled to regulate shade-avoidance responses. Here, we show that low R:FR detection changes the cellular location of the PIN-FORMED 3 (PIN3) protein, a regulator of auxin efflux, in Arabidopsis seedlings. As a result, auxin levels in the e

SUBMITTER: Keuskamp DH 

PROVIDER: S-EPMC3012496 | biostudies-literature | 2010 Dec

REPOSITORIES: biostudies-literature