作者: Gloria Serrano , Rosana Herrera-Palau , José M. Romero , Aurelio Serrano , George Coupland
DOI: 10.1016/J.CUB.2009.01.044
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摘要: Summary Background The circadian clock controls several important processes in plant development, including the phase transition from vegetative growth to flowering. In Arabidopsis thaliana , circadian-regulated gene CONSTANS ( CO ) plays a central role photoperiodic control of floral transition, one most conserved flowering responses among distantly related plants. is a member plant-specific family transcription factors, and when it arose during evolution higher plants unclear. Results A homologous present genome the unicellular green alga Chlamydomonas reinhardtii CrCO ) can complement co mutation promote early wild-type expressed under different promoters. Transcript levels FLOWERING LOCUS T FT ), main target CO, are increased transgenic way similar those overexpressing . microalga, expression influenced by day length clock, being higher in short photoperiods. Reduction RNA interference induces defects culture growth, whereas algae induced express high show alterations output processes, such as starch accumulation onset genes that regulate cell cycle. Conclusions effects observed may reflect for coordination regulated photoperiod clock. Our data indicate orthologs probably represent ancient regulators photoperiod-dependent events these evolutionary lineage gave rise