Auxin flow mediated competition between axillary buds to restore apical dominance

Balla, Jozef and Medved'ová, Zuzana and Kalousek, Petr and Matiješčuková, Natálie and Friml, Jiří and Reinöhl, Vilém and Procházka, Stanislav (2016) Auxin flow mediated competition between axillary buds to restore apical dominance. Scientific Reports, 6. Article number: 35955. ISSN 20452322

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Official URL: http://dx.doi.org/10.1038/srep35955

Abstract

Apical dominance is one of the fundamental developmental phenomena in plant biology, which determines the overall architecture of aerial plant parts. Here we show apex decapitation activated competition for dominance in adjacent upper and lower axillary buds. A two-nodal-bud pea (Pisum sativum L.) was used as a model system to monitor and assess auxin flow, auxin transport channels, and dormancy and initiation status of axillary buds. Auxin flow was manipulated by lateral stem wounds or chemically by auxin efflux inhibitors 2,3,5-triiodobenzoic acid (TIBA), 1-N-naphtylphtalamic acid (NPA), or protein synthesis inhibitor cycloheximide (CHX) treatments, which served to interfere with axillary bud competition. Redirecting auxin flow to different points influenced which bud formed the outgrowing and dominant shoot. The obtained results proved that competition between upper and lower axillary buds as secondary auxin sources is based on the same auxin canalization principle that operates between the shoot apex and axillary bud. © The Author(s) 2016.

Item Type: Article
DOI: 10.1038/srep35955
Subjects: 500 Science > 580 Plants > 581 Botany
Research Group: Friml Group
SWORD Depositor: Sword Import User
Depositing User: Sword Import User
Date Deposited: 26 Jan 2017 15:10
Last Modified: 30 Aug 2017 14:28
URI: https://repository.ist.ac.at/id/eprint/745

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