IDENTIFICATION OF A LIGHT-REGULATED MYB GENE FROM AN ARABIDOPSIS TRANSCRIPTION FACTOR GENE COLLECTION

Seven different MYB-related genes have been isolated from a genomic Ar abidopsis library with probes based on MYB DNA-binding motifs. The pre dicted amino acid sequence of these genes showed high similarity in th e MYB domain but outside this region virtually no similarities were fo und. The set of MYB-related genes was used to identify differentially expressed genes following the transfer of etiolated seedlings to light . This differential screen resulted in the selection of the ATM4 gene which is induced by light within one hour of exposure of etiolated or dark-adapted seedlings.