Gibberellin Enhances the Anisotropy of Cell Expansion in the Growth Zone of the Maize Leaf.

ABSTRACT: Although plant organ shapes are defined by spatio-temporal variations of directional tissue expansion, this is a little characterized aspect of organ growth regulation. Although it is well known that the plant hormone gibberellin increases the leaf length/with ratio, its effects on cell expansion in the growing leaf are largely unknown. To understand how variations in rate and anisotropy of growth establish the typical monocotelydonous leaf shape, we studied the leaf growth zone of maize (Zea mays) with a kinematic analysis of cell expansion in the three directions of growth: proximo-distal, medio-lateral, and dorso-ventral. To determine the effect of gibberellin, we compared a gibberellin-deficient dwarf3 mutant and the overproducing UBI::GA20OX-1 line with their wild types.

SUBMITTER: Sprangers K 

PROVIDER: S-EPMC7417610 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature