Light inhibition of fumarase in Arabidopsis leaves is phytochrome A-dependent and mediated by calcium.
Plant Physiol Biochem
; 102: 161-6, 2016 May.
Article
em En
| MEDLINE
| ID: mdl-26949024
ABSTRACT
Inhibition of fumarase activity in the light has been studied in Arabidopsis in relation to the involvement of phytochrome. Using knockout phytochrome mutants, we observed that the main regulator of FUM1 gene transcription, encoding the mitochondrial form of fumarase, is phytochrome A. The active form of phytochrome A suppressed FUM1 expression, while the expression of the FUM2 gene encoding the cytosolic form of fumarase was unaffected both in darkness and in light. The nuclear concentration of Ca(2+) was modulated by red and far-red light. We suggest that the signal transduction mechanism operates via Ca(2+) activation of expression of the gene encoding the transcription factor PIF3, which binds to promoters of phytochrome-regulated genes and inhibits FUM1 expression.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Regulação Enzimológica da Expressão Gênica
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Cálcio
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Arabidopsis
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Regulação da Expressão Gênica de Plantas
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Proteínas de Arabidopsis
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Fitocromo A
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Fumarato Hidratase
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Luz
Idioma:
En
Revista:
Plant Physiol Biochem
Assunto da revista:
BIOQUIMICA
/
BOTANICA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Federação Russa