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Agronomy 2017, 7(1), 25; doi:10.3390/agronomy7010025

Coordination of Cryptochrome and Phytochrome Signals in the Regulation of Plant Light Responses

1
Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
2
College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
3
College of Life Science, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
4
Department of Molecular, Cell & Developmental Biology, University of California, Los Angeles, CA 90095, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Dan Mullan
Received: 30 January 2017 / Revised: 13 March 2017 / Accepted: 13 March 2017 / Published: 21 March 2017
(This article belongs to the Special Issue Impacts of Photoreceptors on Plant Growth and Development)
View Full-Text   |   Download PDF [1297 KB, uploaded 21 March 2017]   |  

Abstract

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. View Full-Text
Keywords: phytochrome; cryptochrome; de-etiolation; photoperiodic flowering; gene expression phytochrome; cryptochrome; de-etiolation; photoperiodic flowering; gene expression
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MDPI and ACS Style

Su, J.; Liu, B.; Liao, J.; Yang, Z.; Lin, C.; Oka, Y. Coordination of Cryptochrome and Phytochrome Signals in the Regulation of Plant Light Responses. Agronomy 2017, 7, 25.

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