| An assessment of morphogenetic fluctuation during reproductive phase change in Arabidopsis. | |
| | |
MedLine Citation:
|
PMID: 21367754 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
BACKGROUND AND AIMS: Reproductive phase change in Arabidopsis thaliana is characterized by two transitions in phytomer identity, the differentiation of the first elongate internode (bolting transition) and of the first flower (floral transition). An evaluation of the dynamics of these transitions was sought by examining the precision of the corresponding phytomer identity changes. METHODS: The length of the first elongate internode and the frequency of chimeric inflorescence structures, e.g. paraclades not subtended by a leaf (no-leaf/paraclades) and flowers subtended by a bract (bract/flowers), were measured in the Wassilewskija (Ws) accession and 47 early flowering mutants under a wide range of photoperiods. The impact of photoperiodic perturbations applied to Ws plants at different times of development was also evaluated. KEY RESULTS: In Ws, both types of characters were remarkably constant across photoperiods in spite of a high degree of interindividual variability. Bract/flowers were not normally produced in Ws, but they were observed in conditions that suggest enhanced light signalling, e.g. in response to continuous light perturbations and in mutants with reduced hypocotyl elongation. In contrast, no-leaf/paraclades were normally present in approx. 20 % of Ws plants, and their frequency was increased in conditions that suggest reduced light signalling, e.g. in mutants with altered specification of long-day responses. The length of the first elongate internode was unrelated to the rate of stem elongation and to the regulation of reproductive phase change. CONCLUSIONS: Bract/flowers and no-leaf/paraclades corresponded to opposite effects on the floral transition that reflected different dynamics of progression to flowering. In contrast, the length of the first elongate internode was only indirectly related to the regulation of reproductive phase change and was mainly dependent on global morphogenetic constraints. This paper proposes that morphogenetic variability could be used to identify critical phases of development and characterize the canalization of developmental patterns. |
| | |
Authors:
|
Sylvie Pouteau; Catherine Albertini |
Related Documents
:
|
21194554 - Time dependence of coupling in frequency-scaled bimanual coordination. 22417174 - All-trans retinal mediates light-induced oxidation in single living rod photoreceptors(... 8855044 - Evaluation of hypostasis using a colorimeter measuring system and its application to as... 22329764 - Ultrafast photochemistry of light-adapted and dark-adapted bacteriorhodopsin: effects o... 8968074 - Light-dependent activation of 7,12-dimethylbenz[a]anthracene to a potent genotoxicant. 9189904 - Unusual responses to light and darkness of ocular melatonin in european sea bass. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2011-03-01 |
Journal Detail:
|
Title: Annals of botany Volume: 107 ISSN: 1095-8290 ISO Abbreviation: Ann. Bot. Publication Date: 2011 May |
Date Detail:
|
Created Date: 2011-04-22 Completed Date: 2011-08-03 Revised Date: 2012-05-01 |
Medline Journal Info:
|
Nlm Unique ID: 0372347 Medline TA: Ann Bot Country: England |
Other Details:
|
Languages: eng Pagination: 1017-27 Citation Subset: IM |
Affiliation:
|
Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, RD 10, Versailles, France. Sylvie.Pouteau@versailles.inra.fr |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Arabidopsis
/
anatomy & histology,
growth & development,
physiology* Flowers / growth & development, physiology Light Signal Transduction Phenotype Photoperiod Plant Leaves / anatomy & histology, growth & development, physiology Reproduction |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Rapamycin-mediated mTOR inhibition attenuates survivin and sensitizes glioblastoma cells to radiatio...
Next Document: Trends in hospitalisations associated with paediatric burns.