Xyloglucan Remodeling Defines Auxin-Dependent Differential Tissue Expansion in Plants.

ABSTRACT: Size control is a fundamental question in biology, showing incremental complexity in plants, whose cells possess a rigid cell wall. The phytohormone auxin is a vital growth regulator with central importance for differential growth control. Our results indicate that auxin-reliant growth programs affect the molecular complexity of xyloglucans, the major type of cell wall hemicellulose in eudicots. Auxin-dependent induction and repression of growth coincide with reduced and enhanced molecular complexity of xyloglucans, respectively. In agreement with a proposed function in growth control, genetic interference with xyloglucan side decorations distinctly modulates auxin-dependent differential growth rates. Our work proposes that auxin-dependent growth programs have a spatially defined effect on

SUBMITTER: Velasquez SM 

PROVIDER: S-EPMC8430841 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature