Original video: https://youtu.be/PrKmvyyicMQ
Delivered on: 29 DECEMBER 2022
This video delves into the fascinating world of cryptochromes, the blue light photoreceptors that play a crucial role in regulating plant growth and development. 🌿 We'll explore their functions, mechanisms of action, and significance in various light-induced responses.
Cryptochromes are blue-light photoreceptors that mediate several blue-light responses, including suppression of hypocotyl elongation, promotion of cotyledon expansion, membrane depolarization, inhibition of petiole
elongation, anthocyanin production, and circadian clock entrainment.
CRYPTOCHROME1 (CRY1), was originally identified in Arabidopsis using genetic screens for mutants whose hypocotyls were elongated when grown
in white light because they lacked the light-stimulated inhibition of hypocotyl elongation described above.
Further analyses showed that the long hypocotyl phenotype of one of the mutants, hy4, was specific to blue light-inhibition of hypocotyl elongation. That is, hypocotyl elongation was still inhibited by red light in the hy4 mutant. As will be discussed later in the chapter, cryptochromes are responsible for the long-term blue light-induced inhibition of hypocotyl elongation, while phototropins mediate
the rapid inhibitory response.
Complementary Slides Photoreceptors in Plants (Cryptochrome)
Keywords: Cryptochromes, blue light, photoreceptors, plant development, hypocotyl elongation, cotyledon expansion, membrane depolarization, petiole elongation, anthocyanin production, circadian clock, CRYPTOCHROME1 (CRY1), phototropins, plant physiology
Location:
Faculty of Agriculture, Universiti Putra Malaysia
Fakulti Pertanian, Universiti Putra Malaysia, 43000 Seri Kembangan, Selangor
XPMM+9J Seri Kembangan, Selangor
2.9845517506267742, 101.73803356324866
Attribution 4.0 International — CC BY 4.0 - Creative Commons
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