Enhancement of blue-light sensitivity of Arabidopsis seedlings by a blue light receptor cryptochrome 2

Autor: Anthony R. Cashmore, Hongyun Yang, Chentao Lin, Jeff Z. Y. Chen, Todd C. Mockler, Hongwei Guo
Rok vydání: 1998
Předmět:
Zdroj: Proceedings of the National Academy of Sciences. 95:2686-2690
ISSN: 1091-6490
0027-8424
DOI: 10.1073/pnas.95.5.2686
Popis: Cryptochrome is a group of flavin-type blue light receptors that regulate plant growth and development. The function of Arabidopsis cryptochrome 2 in the early photomorphogenesis of seedlings was studied by using transgenic plants overexpressing CRY2 protein, and cry2 mutant plants accumulating no CRY2 protein. It is found that cryptochrome 2 mediates blue light-dependent inhibition of hypocotyl elongation and stimulation of cotyledon opening under low intensities of blue light. In contrast to CRY1, the expression of CRY2 is rapidly down-regulated by blue light in a light-intensity dependent manner, which provides a molecular mechanism to explain at least in part that cryptochrome 2 functions primarily under low light during the early development of seedlings.
Databáze: OpenAIRE