Light control of Arabidopsis development entails coordinated regulation of genome expression and cellular pathways.
An expressed sequence tag-based microarray was used to profile genome expression underlying light control of Arabidopsis development. Qualitatively similar gene expression profiles were observed among seedlings grown in different light qualities, including far-red, red, and blue light, which are mediated primarily by phytochrome A, phytochrome B, and the cryptochromes, respectively. Furthermore, light/dark transitions also triggered similar differential genome expression profiles. Most light treatments also resulted in distinct expression profiles in small fractions of the expressed sequence tags examined. The similarly regulated genes in all light conditions were estimated to account for approximately one-third of the genome, with three-fifths upregulated and two-fifths downregulated by light. Analysis of those light-regulated genes revealed more than 26 cellular pathways that are regulated coordinately by light. Thus, light controls Arabidopsis development through coordinately regulating metabolic and regulatory pathways.
Ma
L
L
Peking-Yale Joint Center of Plant Molecular Genetics and Agrobiotechnology, College of Life Sciences, Peking University, Beijing 100871, People's Republic of China.
Li
J
J
Qu
L
L
Hager
J
J
Chen
Z
Z
Zhao
H
H
Deng
X W
XW
D017360:Arabidopsis / Q000235:genetics / Q000254:growth & development* / Q000528:radiation effects; D029681:Arabidopsis Proteins; D056931:Cryptochromes; D029721:Drosophila Proteins; D020224:Expressed Sequence Tags; D005136:Eye Proteins; D005420:Flavoproteins / Q000235:genetics / Q000528:radiation effects; D018507:Gene Expression Regulation, Developmental / Q000528:radiation effects; D018506:Gene Expression Regulation, Plant / Q000528:radiation effects; D018745:Genome, Plant; D008027:Light; D020411:Oligonucleotide Array Sequence Analysis; D010786:Photoreceptor Cells / Q000528:radiation effects; D017956:Photoreceptor Cells, Invertebrate; D010834:Phytochrome / Q000235:genetics / Q000528:radiation effects; D051942:Phytochrome A; D051939:Phytochrome B; D010940:Plant Proteins / Q000235:genetics* / Q000528:radiation effects; D018520:Plant Shoots / Q000235:genetics / Q000254:growth & development / Q000528:radiation effects; D043562:Receptors, G-Protein-Coupled; D014157:Transcription Factors
D029681:Arabidopsis Proteins; C538962:CRY1 protein, Arabidopsis; D056931:Cryptochromes; D029721:Drosophila Proteins; D005136:Eye Proteins; D005420:Flavoproteins; C497973:PHYA protein, Arabidopsis; C497952:PHYB protein, Arabidopsis; D051942:Phytochrome A; D010940:Plant Proteins; D043562:Receptors, G-Protein-Coupled; D014157:Transcription Factors; C119828:cry protein, Drosophila; D010834:Phytochrome; D051939:Phytochrome B