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

• DOI: 10.1073/pnas.95.5.2686
• Publication Date: 2002-07-26T14:44:19Z
• Authors: Chentao Lin; Hongyun Yang; Hongwei Guo; Todd Mockler; Jeff Chen; Anthony R. Cashmore
• Keywords: Photomorphogenesis; Cotyledon; Phytochrome; Light sensitivity; Phototropism

Cryptochrome is a group of flavin-type blue light receptors that regulate plant growth and development. The function Arabidopsis cryptochrome 2 in the early photomorphogenesis seedlings was studied by using transgenic plants overexpressing CRY2 protein, cry2 mutant accumulating no protein. It found mediates light-dependent inhibition hypocotyl elongation stimulation cotyledon opening under low intensities light. In contrast to CRY1, expression rapidly down-regulated light-intensity dependent manner, which provides molecular mechanism explain at least part functions primarily during development seedlings.