Journal article
The roles of the GA receptors GID1a, GID1b, and GID1c in sly1-independent GA signaling
Plant signaling & behavior, Vol.9(2), pp.e28030-e28030
02/01/2014
Handle:
https://hdl.handle.net/2376/114562
PMCID: PMC4091331
PMID: 24521922
Abstract
Gibberellin (GA) hormone signaling occurs through proteolytic and non-proteolytic mechanisms. GA binding to the GA receptor GID1 (GA-INSENSITIVE DWARF1) enables GID1 to bind negative regulators of GA responses called DELLA proteins. In proteolytic GA signaling, the SLEEPY1 (SLY1) F-box protein targets DELLA proteins in the GID1-GA-DELLA complex for destruction through the ubiquitin-proteasome pathway. Non-proteolytic GA signaling in
sly1
mutants where GA cannot target DELLA proteins for destruction, requires GA and
GID1
gene function. Based on comparison of
gid1
multiple mutants to
sly1 gid1
mutants,
GID1a
is the primary GA receptor stimulating stem elongation in proteolytic and non-proteolytic signaling, and stimulating fertility in proteolytic GA signaling.
GID1b
plays the primary role in fertility, and a secondary role in elongation during non-proteolytic GA signaling. The stronger role of
GID1b
in non-proteolytic GA signaling may result from the fact that GID1b has higher affinity for DELLA protein than GID1a and GID1c.
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Details
- Title
- The roles of the GA receptors GID1a, GID1b, and GID1c in sly1-independent GA signaling
- Creators
- Amber L Hauvermale - Department of Crop and Soil Science; Washington State University; Pullman, WA USATohru Ariizumi - Department of Crop and Soil Science; Washington State University; Pullman, WA USACamille M Steber - Department of Crop and Soil Science; Washington State University; Pullman, WA USA
- Publication Details
- Plant signaling & behavior, Vol.9(2), pp.e28030-e28030
- Academic Unit
- Crop and Soil Sciences, Department of
- Publisher
- Landes Bioscience
- Identifiers
- 99900547860501842
- Language
- English
- Resource Type
- Journal article