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The hormonal regulation of de-etiolation


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

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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 Type: Article
Keywords: Arabidopsis · Brassinosteroid · De-etiolation · Gibberellin · Hormones · Light
Journal or Publication Title: Planta
Page Range: pp. 1115-1125
ISSN: 0032-0935
Identification Number - DOI: 10.1007/s00425-007-0685-x
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Date Deposited: 08 Jul 2011 05:34
Last Modified: 18 Nov 2014 04:20
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