Phytochrome A Regulates Red-Light Induction of Phototropic Enhancement in Arabidopsis
Open Access
- 1 January 1996
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 110 (1), 155-162
- https://doi.org/10.1104/pp.110.1.155
Abstract
Phytochrome A (phyA) and phytochrome B photoreceptors have distinct roles in the regulation of plant growth and development. Studies using specific photomorphogenic mutants and transgenic plants overexpressing phytochrome have supported an evolving picture in which phyA and phytochrome B are responsive to continuous far-red and red light, respectively. Photomorphogenic mutants of Arabidopsis thaliana that had been selected for their inability to respond to continuous irradiance conditions were tested for their ability to carry out red-light-induced enhancement of phototropism, which is an inductive phytochrome response. We conclude that phyA is the primary photoreceptor regulating this response and provide evidence suggesting that a common regulatory domain in the phyA polypeptide functions for both high-irradiance and inductive phytochrome responses.Keywords
This publication has 20 references indexed in Scilit:
- Missense mutations define a restricted segment in the C-terminal domain of phytochrome A critical to its regulatory activity.Plant Cell, 1995
- Spotlight on Phytochrome Nomenclature.Plant Cell, 1994
- Dominant negative suppression of arabidopsis photoresponses by mutant phytochrome A sequences identifies spatially discrete regulatory domains in the photoreceptor.Plant Cell, 1994
- Arabidopsis HY8 locus encodes phytochrome A.Plant Cell, 1993
- Mutations in the gene for the red/far-red light receptor phytochrome B alter cell elongation and physiological responses throughout Arabidopsis development.Plant Cell, 1993
- hy8, a new class of arabidopsis long hypocotyl mutants deficient in functional phytochrome A.Plant Cell, 1993
- The hy3 Long Hypocotyl Mutant of Arabidopsis Is Deficient in Phytochrome B.Plant Cell, 1991
- Light-Regulated Gravitropism in Seedling Roots of MaizePlant Physiology, 1987
- Effect of Red Light on Geotropism in Pea EpicotylsPlant Physiology, 1979
- A Rapid and Sensitive Method for the Quantitation of Microgram Quantities of Protein Utilizing the Principle of Protein-Dye BindingAnalytical Biochemistry, 1976