Microarray analysis of genes that respond to gamma-irradiation in Arabidopsis.
To reveal the signal transduction mechanism of the response to stress in the form of active oxygen species, we used a microarray system to analyze gene expression patterns 2 or 24 h after gamma-irradiation of Arabidopsis. gamma-Irradiation induces several signal transduction and metabolite genes. By analysis of cis-elements located on the promoter region of the gamma-responsive genes, we have also found several cis-elements related to various signal transduction systems. We also analyzed the pleiotropic mutant ttg1-1, which has a dramatically altered physiological response to gamma-irradiation. By comparing the gene expression patterns of wild-type (Ler) and ttg1-1 mutant plants after gamma-irradiation, we identified various TTG1-regulated gamma-response genes. Analysis of the cis-elements in the promoter region of the gamma-responsive genes also revealed that the many transcription factors interacting with TTG1 protein (WD40 protein) are related to the gamma-responsive gene expression.
Nagata
Toshifumi
T
National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan.
Yamada
Hitomi
H
Du
Zeji
Z
Todoriki
Setsuko
S
Kikuchi
Shoshi
S
D017360:Arabidopsis / Q000235:genetics*; D029681:Arabidopsis Proteins / Q000235:genetics; D005720:Gamma Rays; D015870:Gene Expression / Q000528:radiation effects*; D017343:Genes, Plant / Q000528:radiation effects*; D009154:Mutation; D020411:Oligonucleotide Array Sequence Analysis; D018749:RNA, Plant / Q000032:analysis
D029681:Arabidopsis Proteins; D018749:RNA, Plant; C121067:TTG1 protein, Arabidopsis