1365-313X/asset/cover.gif?v=1&s=b8615e6a009ad3b444c73042a1ee6da164712df0 "The Plant Journal")
Present address: Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA 90095, USA.
1365-313X/asset/TPJ_left.gif?v=1&s=98f11c85833302cb41315552dfbb4107cd241542)
1365-313X/asset/TPJ_right.gif?v=1&s=5e8e5ca914032d030f15cf9f8427ee5ead0e0f39)
You have full text access to this OnlineOpen article
Arabidopsis cryptochrome 1 is a soluble protein mediating blue light-dependent regulation of plant growth and development
Article first published online: 5 MAR 2002
DOI: 10.1046/j.1365-313X.1996.10050893.x
Additional Information
How to Cite
Lin, C., Ahmad, M. and Cashmore, A. R. (1996), Arabidopsis cryptochrome 1 is a soluble protein mediating blue light-dependent regulation of plant growth and development. The Plant Journal, 10: 893–902. doi: 10.1046/j.1365-313X.1996.10050893.x
Publication History
- Issue published online: 5 MAR 2002
- Article first published online: 5 MAR 2002
- Received 29 February 1996; revised 19 July 1996; accepted 3 September 1996.
- Abstract
- Cited By
Cryptochrome 1 (CRY1) is a flavin-type blue light receptor of Arabidopsis thaliana which mediates inhibition of hypocotyl elongation. In the work described in this report it is demonstrated that CRY1 is a soluble protein expressed in both young seedlings grown either in the dark or under light, and in different organs of adult plants. The functional role of CRY1 was further investigated using transgenic Arabidopsis plants overexpressing CRY1. It is demonstrated that overexpression of CRY1 resulted in hypersensitivity to blue, UV-A, and green light for the inhibition of hypocotyl elongation response. Transgenic plants overexpressing CRY1 also exhibited a dwarf phenotype with reduced size in almost every organ. This was in keeping with the previous observation of reciprocal alterations found in hy4 mutant plants and is consistent with a hypothesis that CRY1 mediates a light-dependent process resulting in a general inhibitory effect on plant growth. In addition, transgenic plants overexpressing CRY1 showed increased anthocyanin accumulation in response to blue, UV-A, and green light in a fluence rate-dependent manner. This increase in anthocyanin accumulation in transgenic plants was shown to be concomitant with increased blue light-induction of CHS gene expression. It is concluded that CRY1 is a photoreceptor mediating blue light-dependent regulation of gene expression in addition to its affect on plant growth.