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- Title
The hormonal regulation of de-etiolation.
- Authors
Symons, Gregory M.; Smith, Jennifer J.; Nomura, Takahito; Davies, Noel W.; Yokota, Takao; Reid, James B.
- 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.
- Subjects
GIBBERELLINS; BRASSINOSTEROIDS; PLANT morphology; PLANT hormones; PLANT regulators; BARLEY; ARABIDOPSIS thaliana; PEAS; BOTANY
- Publication
Planta: An International Journal of Plant Biology, 2008, Vol 227, Issue 5, p1115
- ISSN
0032-0935
- Publication type
Article
- DOI
10.1007/s00425-007-0685-x