Brassinosteroid signaling-dependent root responses to prolonged elevated ambient temperature.

ABSTRACT: Due to their sessile nature, plants have to cope with and adjust to their fluctuating environment. Temperature elevation stimulates the growth of Arabidopsis aerial parts. This process is mediated by increased biosynthesis of the growth-promoting hormone auxin. How plant roots respond to elevated ambient temperature is however still elusive. Here we present strong evidence that temperature elevation impinges on brassinosteroid hormone signaling to alter root growth. We show that elevated temperature leads to increased root elongation, independently of auxin or factors known to drive temperature-mediated shoot growth. We further demonstrate that brassinosteroid signaling regulates root responses to elevated ambient temperature. Increased growth temperature specifically impacts on the level

SUBMITTER: Martins S 

PROVIDER: S-EPMC5567177 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature