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The hormonal regulation of de-etiolation


Symons, GM and Smith, JJ and Nomura, T and Davies, NW and Yokota, T and Reid, JB, The hormonal regulation of de-etiolation, Planta, 227, (5) pp. 1115-1125. ISSN 0032-0935 (2008) [Refereed Article]

DOI: doi:10.1007/s00425-007-0685-x


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.

Item Details

Item Type:Refereed Article
Keywords:Arabidopsis Brassinosteroid De-etiolation Gibberellin Hormones Light
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Horticultural crops not elsewhere classified
UTAS Author:Symons, GM (Mr Gregory Symons)
UTAS Author:Smith, JJ (Ms Jenny Smith)
UTAS Author:Davies, NW (Associate Professor Noel Davies)
UTAS Author:Reid, JB (Professor Jim Reid)
ID Code:55068
Year Published:2008
Web of Science® Times Cited:29
Deposited By:Plant Science
Deposited On:2009-03-04
Last Modified:2009-05-18

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