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Callose accumulation in specific phloem cell types reduces axillary bud growth in Arabidopsis thaliana.

Accepted version
Peer-reviewed

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Authors

Fichtner, Franziska  ORCID logo  https://orcid.org/0000-0002-4508-5437
Delacruz, Ruth 

Abstract

Shoot branching involves the coordinated regulation of the activity of meristems established in the axils of leaves along the stem (Mcsteen and Leyser, 2005). Once established, such axillary meristems often arrest as a dormant bud after the production of a few leaves. The hormone auxin, produced in the shoot apex, plays a central role in this process by moving downward in the stem and maintaining these axillary meristems in an inactive state, a process termed apical dominance (Morris, 1977, Snow, 1925, 1929). Since auxin does not itself enter the buds, the auxin transport canalisation model for bud regulation was postulated (Li and Bangerth, 1999; Bennett et al. 2006). According to this model, each bud, acting as an auxin source, must establish canalised auxin export in order to grow.

Description

Keywords

buds, callose, companion cells, phloem, plasmodesmata, shoot branching, Arabidopsis, Arabidopsis Proteins, Gene Expression Regulation, Plant, Glucans, Phloem

Journal Title

New Phytol

Conference Name

Journal ISSN

0028-646X
1469-8137

Volume Title

231

Publisher

Wiley

Rights

All rights reserved
Sponsorship
Gatsby Charitable Foundation (GAT3395/PR3)
Gatsby Charitable Foundation (GAT3395/PR3B)