Journal article
Genetic Interactions Between Brassinosteroid-Inactivating P450s and Photomorphogenic Photoreceptors in Arabidopsis thaliana
G3 (Bethesda, Md.), Vol.2(12), pp.1585-1593
12/2012
Handle:
https://hdl.handle.net/2376/105978
PMCID: PMC3516480
PMID: 23275881
Abstract
Plants use light as a source of information via a suite of photomorphogenic photoreceptors to optimize growth in response to their light environment. Growth-promoting hormones such as brassinosteroids also can modulate many of these responses. BAS1 and SOB7 are brassinosteroid-catabolizing P450s in
Arabidopsis thaliana
that synergistically/redundantly modulate photomorphogenic traits such as flowering time. The role of BAS1 and SOB7 in photomorphogenesis has been investigated by studying null-mutant genetic interactions with the photoreceptors phyA, phyB, and cry1 with regard to seed germination and flowering time. The removal of
BAS1
and/or
SOB7
rescued the low germination rate of the
phyA-211 phyB-9
double-null mutant. With regard to floral induction,
bas1-2
and
sob7-1
showed a complex set of genetic interactions with photoreceptor-null mutants. Histochemical analysis of transgenic plants harboring
BAS1
:BAS1-GUS and
SOB7
:SOB7-GUS translational fusions under the control of their endogenous promoters revealed overlapping and distinct expression patterns. BAS1’s expression in the shoot apex increases during the phase transition from short-to-long-day growth conditions and requires phyB in red light. In summary,
BAS1
and
SOB7
displayed both simple and complex genetic interactions with the phytochromes in a plant-stage specific manner.
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Details
- Title
- Genetic Interactions Between Brassinosteroid-Inactivating P450s and Photomorphogenic Photoreceptors in Arabidopsis thaliana
- Creators
- Kulbir Singh Sandhu - Department of Crop and Soil Sciences, Washington State University, Pullman, Washington 99164Katherine Hagely - College of Agriculture, Food and Natural Resources, University of Missouri, Columbia, Missouri 65211Michael M Neff - Department of Crop and Soil Sciences, Washington State University, Pullman, Washington 99164
- Publication Details
- G3 (Bethesda, Md.), Vol.2(12), pp.1585-1593
- Academic Unit
- Crop and Soil Sciences, Department of
- Publisher
- Genetics Society of America
- Identifiers
- 99900546881901842
- Language
- English
- Resource Type
- Journal article