INVESTIGADORES
YANOVSKY Marcelo Javier
artículos
Título:
Regulation of gene expression by light
Autor/es:
? CASAL JJ AND MJ YANOVSKY
Revista:
INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY
Referencias:
Año: 2005 p. 501 - 511
ISSN:
0214-6282
Resumen:
ABSTRACT Light signals perceived mainly by phytochromes and cryptochromes regulate plant
growth and development by driving dramatic shifts of the transcriptome. Early light-responsive
genes include a large proportion of transcripton factors of different DNA binding motifs. Mutations
at loci encoding several transcriptional regulators, including some of those showing rapid changes
in transcript levels, impair responses to light in Arabidopsis thaliana. Proteasome-mediated
degradation involving the E3 ligase COP1 provides an additional layer of control of the levels of
transcription factors. Some transcriptional regulators are shared by light, circadian and/or hormonal
signalling circuits creating complex networks that interactively integrate environmental and
endogenous cues.