Stable establishment of organ polarity occurs several plastochrons before primordium outgrowth in Arabidopsis.

ABSTRACT: In many species, leaves are initiated at the flanks of shoot meristems. Subsequent growth usually occurs mainly in the plane of the leaf blade, which leads to the formation of a bifacial leaf with dorsoventral identities. In a classical set of surgical experiments in potato meristems, Sussex provided evidence that dorsoventrality depends on a signal emanating from the meristem center. Although these results could be reproduced in tomato, this concept has been debated. We revisited these experiments in Arabidopsis, in which a range of markers are available to target the precise site of ablation. Using specific markers for organ founder cells and dorsoventral identity, we were unable to perturb the polarity of leaves and sepals long before organ outgrowth. Although results in Solanaceae sugg

SUBMITTER: Zhao F 

PROVIDER: S-EPMC8255034 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature