Emerging Roles and New Paradigms in Signaling Mechanisms of Plant Cryptochromes

Analogous to the opsin-based receptors in animals, plants contain a diverse and elaborate set of photoreceptors to perceive a much wider spectrum of light and adapt to varying light conditions. Cryptochromes (CRYs), the blue/UV-A light sensing receptors, represent one such class of photoreceptors fo...

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Bibliographic Details
Published in:Critical reviews in plant sciences 2017-03, Vol.36 (2), p.89-115
Main Authors: Mishra, Sushma, Khurana, Jitendra P.
Format: Article
Language:English
Subjects:
blue light photoreceptor
Circadian rhythms
Cryptochromes
Deoxyribonucleic acid
DNA
DNA damage
DNA repair
Etiolation
Flowering
Gene expression
light signaling
photomorphogenesis
Photoreception
Photoreceptors
phytohormones
Receptors
Seedlings
Signal transduction
Signaling
Structural damage
Ultraviolet radiation
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Summary:Analogous to the opsin-based receptors in animals, plants contain a diverse and elaborate set of photoreceptors to perceive a much wider spectrum of light and adapt to varying light conditions. Cryptochromes (CRYs), the blue/UV-A light sensing receptors, represent one such class of photoreceptors found ubiquitously in plants. Although structurally similar to DNA photolyases which could repair UV-induced DNA damage, photoactivated CRYs, instead, initiate signal transduction pathways, which lead to gene expression changes and eventually more overt photomorphogenic responses. Apart from the well-established roles of CRYs in regulating seedling de-etiolation, flowering time, and circadian clock, recent reports have highlighted their roles in controlling other aspects of plant development as well. This review attempts to describe the novel/atypical roles of CRYs that have emerged in the past few years, and also present an account of the various signaling components involved in CRY signal transduction pathway.
ISSN:0735-2689
1549-7836
DOI:10.1080/07352689.2017.1348725