Genetic interactions in plant photomorphogenesis
Academic Article
Overview
Research
Identity
Additional Document Info
Other
View All
Overview
abstract
Phytochrome and a blue light receptor mediate a developmental switch from etiolated growth to the photosynthetically competent 'de-etiolated' program. The analysis of Arabidopsis mutants deficient in photomorphogenetic responses (e.g. hy, blu) has identified several elements that mediate the red/far-red and blue light responses. Mutants that appear de-etiolated in the absence of light (e.g. det1, det2, cop1) implicate negatively-acting elements that integrate red and blue light signals. Phenocopy of the de-etiolated mutants by cytokinin implicates a role for this hormone in promoting seedling photomorphogenesis. Epistasis analyses support a pathway in which DET1 and DET2 are downstream effectors of phytochrome function. 1993 Academic Press. All rights reserved.