Journal article
Light-stimulated cotyledon expansion in the blu3 and hy4 mutants of Arabidopsis thaliana
Plant physiology (Bethesda), Vol.105(4), pp.1433-1436
08/1994
Handle:
https://hdl.handle.net/2376/114692
PMCID: PMC159477
PMID: 7972499
Abstract
Cotyledon expansion in response to blue light was compared for wild-type Arabidopsis thaliana (L.) Heynh. and the mutants blu3 and hy4, which show reduced inhibition of hypocotyl growth in blue light. White, blue, and red light stimulated cotyledon expansion in both intact and excised cotyledons of wild-type seedlings (ecotypes No-0, WS, Co-0, La-er). Cotyledons on intact blu3 and hy4 seedlings did not grow as well as those on the wild type in response to blue light, but pretreatment of blu3 seedlings with low fluence rates of red light increased their responsiveness to blue light. Excision of cotyledons alleviated the mutant phenotype so that both mutant and wild-type cotyledons grew equally well in blue light. The loss of the mutant cotyledon phenotype upon excision indicates that the blu3 and hy4 lesions affect cotyledon expansion indirectly via a whole-plant response to light. Furthermore, the ability of excised, mutant cotyledons to grow normally in blue light shows that this growth response to blue light is mediated by a photosystem other than the ones impaired by the blu3 and hy4 lesions.
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Details
- Title
- Light-stimulated cotyledon expansion in the blu3 and hy4 mutants of Arabidopsis thaliana
- Creators
- D E Blum - Department of Botany AJ-30, University of Washington, Seattle 98195M M Neff - Department of Botany AJ-30, University of Washington, Seattle 98195E Van Volkenburgh - Department of Botany AJ-30, University of Washington, Seattle 98195
- Publication Details
- Plant physiology (Bethesda), Vol.105(4), pp.1433-1436
- Academic Unit
- Crop and Soil Sciences, Department of
- Identifiers
- 99900548481501842
- Language
- English
- Resource Type
- Journal article