Diurnal regulation of plastid genes in Populus deltoides.
Indian J Biochem Biophys
;
2000 Dec; 37(6): 453-8
Artigo
em Inglês
| IMSEAR
| ID: sea-28225
ABSTRACT
Light regulates leaf and chloroplast development, together with overall chloroplast gene expression at various levels. Plants respond to diurnal and seasonal changes in light by changing expression of photosynthesis genes and metabolism. In Populus deltoides, a deciduous tree species, leaf development begins in the month of March and leaf maturation is attained by summer, which is subsequently followed by autumnal senescence and fall. In the present study, diurnal changes in the steady state transcript levels of plastid genes were examined in the fully developed leaves during summer season. Our results show that steady state level of the psaA/B, psbA, psbEFLJ and petA transcripts showed differential accumulation during diurnal cycle in summer. However, there was no significant change in the pigment composition during the day/night cycle. Our studies suggest that the diurnal regulation of steady state mRNA accumulation may play a crucial role during daily adjustments in plants life with rapidly changing light irradiance and temperature.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Árvores
/
Ritmo Circadiano
/
Plastídeos
/
Folhas de Planta
/
Regulação da Expressão Gênica de Plantas
Idioma:
Inglês
Revista:
Indian J Biochem Biophys
Ano de publicação:
2000
Tipo de documento:
Artigo
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