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 |
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Rok vydání: | 1998 |
Předmět: |
animal structures
food.ingredient Light Molecular Sequence Data Mutant Arabidopsis Receptors G-Protein-Coupled Hypocotyl Deoxyribodipyrimidine photo-lyase food Cryptochrome Botany Escherichia coli Drosophila Proteins Amino Acid Sequence Eye Proteins Lighting Plant Proteins Multidisciplinary Flavoproteins Sequence Homology Amino Acid biology Arabidopsis Proteins fungi food and beverages Biological Sciences biology.organism_classification Cell biology Cryptochromes Photoreceptor Cells Invertebrate Photomorphogenesis sense organs Deoxyribodipyrimidine Photo-Lyase Sequence Alignment Cotyledon Cryptochrome-1 |
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 |
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