Molecular basis of age-dependent vernalization in Cardamine flexuosa.
Science
; 340(6136): 1097-100, 2013 May 31.
Article
en En
| MEDLINE
| ID: mdl-23723237
ABSTRACT
Plants flower in response to many varied cues, such as temperature, photoperiod, and age. The floral transition of Cardamine flexuosa, a herbaceous biennial-to-perennial plant, requires exposure to cold temperature, a treatment known as vernalization. C. flexuosa younger than 5 weeks old are not fully responsive to cold treatment. We demonstrate that the levels of two age-regulated microRNAs, miR156 and miR172, regulate the timing of sensitivity in response to vernalization. Age and vernalization pathways coordinately regulate flowering through modulating the expression of CfSOC1, a flower-promoting MADS-box gene. The related annual Arabidopsis thaliana, which has both vernalization and age pathways, does not possess an age-dependent vernalization response. Thus, the recruitment of age cue in response to environmental signals contributes to the evolution of life cycle in plants.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Proteínas de Plantas
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Frío
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Regulación de la Expresión Génica de las Plantas
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Proteínas de Dominio MADS
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Cardamine
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Flores
Idioma:
En
Revista:
Science
Año:
2013
Tipo del documento:
Article