Effects of genetic perturbation on seasonal life history plasticity.
Science
; 323(5916): 930-4, 2009 Feb 13.
Article
en En
| MEDLINE
| ID: mdl-19150810
ABSTRACT
Like many species, the model plant Arabidopsis thaliana exhibits multiple different life histories in natural environments. We grew mutants impaired in different signaling pathways in field experiments across the species' native European range in order to dissect the mechanisms underlying this variation. Unexpectedly, mutational loss at loci implicated in the cold requirement for flowering had little effect on life history except in late-summer cohorts. A genetically informed photothermal model of progression toward flowering explained most of the observed variation and predicted an abrupt transition from autumn flowering to spring flowering in late-summer germinants. Environmental signals control the timing of this transition, creating a critical window of acute sensitivity to genetic and climatic change that may be common for seasonally regulated life history traits.
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1
Banco de datos:
MEDLINE
Asunto principal:
Arabidopsis
Tipo de estudio:
Prognostic_studies
Idioma:
En
Año:
2009
Tipo del documento:
Article