Auxin signaling in the epidermis regulates stem growth via interactions with the brassinosteroid pathway

ABSTRACT: Growth of a complex multicellular organism requires coordinated changes in diverse cell types. These cellular changes generate organs of the correct size, shape and functionality. During plant development, the growth hormone auxin induces stem elongation; however, which cell types of the stem perceive the auxin signal and contribute to organ growth is poorly understood. Here, we show that auxin signalling is required in many cell types for correct hypocotyl stem growth, with a key role for the epidermis. Combining genetic manipulations in Arabidopsis thaliana with transcriptional profiling of the hypocotyl epidermis from Brassica rapa, we show that auxin functions in the epidermis in part by inducing activity of the locally-acting, growth-promoting brassinosteroid pathway. Our finding

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Carl Procko 

PROVIDER: E-GEOD-79881 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress