Light affects tissue patterning of the hypocotyl in the shade-avoidance response.

ABSTRACT: Plants have evolved strategies to avoid shade and optimize the capture of sunlight. While some species are tolerant to shade, plants such as Arabidopsis thaliana are shade-intolerant and induce elongation of their hypocotyl to outcompete neighboring plants. We report the identification of a developmental module acting downstream of shade perception controlling vascular patterning. We show that Arabidopsis plants react to shade by increasing the number and types of water-conducting tracheary elements in the vascular cylinder to maintain vascular density constant. Mutations in genes affecting vascular patterning impair the production of additional xylem and also show defects in the shade-induced hypocotyl elongation response. Comparative analysis of the shade-induced transcriptomes revealed

SUBMITTER: Botterweg-Paredes E 

PROVIDER: S-EPMC7153905 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature