ANAC046, a NAC family transcription factor, is involved in leaf senescence by controlling the chlorophyll catabolic gene expression in Arabidopsis

ABSTRACT: Chlorophyll (Chl) degradation is an important process during leaf senescence, bud breaking and fruit ripening. Chlorophyll catabolic pathway has been intensively studied and nearly all the enzymes involved in the pathway are characterized. However, regulatory mechanism of the pathway is largely unknown at the molecular level. In this study, we performed a yeast one-hybrid screening using a library composed only of transcription factor cDNAs to search for factors controlling expression of the chlorophyll catabolic genes. We identified a common regulator, ANAC046, that directly binds to the promoter regions of NON-YELLOW COLORING 1, STAY-GREEN 1 (SGR1), SGR2, and pheophorbide a oxygenase. Transgenic plants overexpressing ANAC046 exhibited an early senescence phenotype with lower chlorophyll

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Nobutaka Mitsuda 

PROVIDER: E-GEOD-71767 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress