The ethylene signaling pathway has a negative impact on sucrose-induced anthocyanin accumulation in Arabidopsis.
J Plant Res
; 124(1): 193-200, 2011 Jan.
Article
em En
| MEDLINE
| ID: mdl-20514508
ABSTRACT
In an attempt to understand the complex regulatory mechanisms underlying sucrose-induced flavonoid biosynthesis, we examined several Arabidopsis mutants with altered anthocyanin accumulation. We determined that disruption of ethylene signaling results in a dramatic increase in sucrose-induced anthocyanin accumulation. Furthermore, we investigated why the ein2-1 (ethylene insensitive) Arabidopsis mutant accumulates higher levels of anthocyanin in response to sucrose than wild-type Arabidopsis. An increased level of PAP1 transcript in the ein2-1 mutant appears to be the main factor responsible for the increased accumulation of anthocyanin in response to sucrose. Therefore, our results indicate that the ethylene signaling pathway plays a negative role in sucrose-induced anthocyanin accumulation. We believe that the explanation for this observation may be related to the initiation of the senescence program in plants.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Sacarose
/
Transdução de Sinais
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Arabidopsis
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Etilenos
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Antocianinas
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article