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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.

Item Type:	Article
Authors/Creators:	Symons, GM and Smith, JJ and Nomura, T and Davies, NW and Yokota, T and Reid, JB
Keywords:	Arabidopsis · Brassinosteroid · De-etiolation · Gibberellin · Hormones · Light
Journal or Publication Title:	Planta
ISSN:	0032-0935
DOI / ID Number:	https://doi.org/10.1007/s00425-007-0685-x
Additional Information:	The final publication is available at http://www.springerlink.com
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