The hormonal regulation of de-etiolation.

Planta
Gregory M SymonsJames B Reid

Abstract

De-etiolation involves a number of phenotypic changes as the plants shift from a dark-grown (etiolated) to a light-grown (de-etiolated) morphology. Whilst these light-induced, morphological changes are thought to be mediated by plant hormones, the precise mechanism/s are not yet fully understood. Here we provide further direct evidence that gibberellins (GAs) may play an important role in de-etiolation, because a similar light-induced reduction in bioactive GA levels was detected in barley (Hordeum vulgare L.), Arabidopsis (Arabidopsis thaliana L.), and pea (Pisum sativum L.). This is indicative of a highly conserved, negative-regulatory role for GAs in de-etiolation, in a range of taxonomically diverse species. In contrast, we found no direct evidence of a reduction in brassinosteroid (BR) levels during de-etiolation in any of these species.

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Feb 4, 2012·The Arabidopsis Book·Steven D Clouse
Sep 18, 2008·Plant Molecular Biology·David Alabadí, Miguel A Blázquez
Jun 11, 2011·Biochemistry·Murli ManoharKendal D Hirschi
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Oct 15, 2009·Plant Signaling & Behavior·Antía Rodríguez-VillalónManuel Rodríguez-Concepción
Mar 28, 2013·Development·Jia-Ying ZhuZhi-Yong Wang
May 15, 2021·PLoS Genetics·Zhenzhen ZhangZhi-Yong Wang

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