期刊
AGRONOMY-BASEL
卷 7, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/agronomy7010025
关键词
phytochrome; cryptochrome; de-etiolation; photoperiodic flowering; gene expression
资金
- Fujian-Taiwan Joint Innovative Center for Germplasm Resources and Cultivation of Crops, China [2015-75]
- Program for New Century Excellent Talents in Fujian Province University
- National Natural Science Foundation of China [31500548, 31650110478]
In nature, plants integrate a wide range of light signals from solar radiation to adapt to the surrounding light environment, and these light signals also regulate a variety of important agronomic traits. Blue light-sensing cryptochrome (cry) and red/far-red light-sensing phytochrome (phy) play critical roles in regulating light-mediated physiological responses via the regulated transcriptional network. Accumulating evidence in the model plant Arabidopsis has revealed that crys and phys share two mechanistically distinct pathways to coordinately regulate transcriptional changes in response to light. First, crys and phys promote the accumulation of transcription factors that regulate photomorphogenesis, such as HY5 and HFR1, via the inactivation of the CONSTITUTIVE PHOTOMORPHOGENIC1/SUPPRESSOR OF PHYA-105 E3 ligase complex by light-dependent binding. Second, photoactive crys and phys directly interact with PHYTOCHROME INTERACTING FACTOR transcription factor family proteins to regulate transcriptional activity. The coordinated regulation of these two pathways (and others) by crys and phys allow plants to respond with plasticity to fluctuating light environments in nature.
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