Photoreceptors as light sensors in plants

Photoreceptors as light sensors in plants
Author(s):
Dr Sukhbir Kaur Gujral
Keywords:
Cryptochrome, phototropin, phytochrome, UVR8, ZEITLUPE
Abstract
Photoreceptors are the proteins that are specially designed to perceive light and signal certain biological effects in the plant. Phytochromes are a class of photoreceptor in plants, bacteria and fungi used to detect light. They are sensitive to light in the red and far-red region of the visible spectrum. Cryptochromes are a class of flavoproteins found in plants and animals that are sensitive to blue light. They are involved in the circadian rhythms and the sensing of magnetic fields in a number of species. Phototropins are plant-specific blue light receptors for phototropism, chloroplast movement, leaf expansion, and stomatal opening. All these responses are thought to optimize photosynthesis by helping to capture light energy efficiently, reduce photodamage, and acquire CO2. ZEITLUPE (ZTL), a photoreceptor with E3 ubiquitin ligase activity, communicates end-of-day light conditions to the plant circadian clock.
Article Details
Unique Paper ID: 156575 Publication Volume & Issue: Volume 3, Issue 4 Page(s): 225 - 231
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