Gibberellin Biosynthesis: Its Regulation by Endogenous and Environmental Signals
Shinjiro Yamaguchi,Yuji Kamiya +1 more
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TLDR
New GA response mutants provided information about how signaling components are involved in feedback regulation of the GA biosynthetic pathway and manipulation of the pathway by modifying the expression of these genes in transgenic plants.Abstract:
The hormone gibberellin (GA) plays an essential role in many aspects of plant growth and development, such as seed germination, stem elongation and flower development. In recent years, exciting progress has been made in understanding how the biosynthesis of this hormone is regulated by endogenous and environmental factors. This has resulted from isolation of genes encoding enzymes involved in GA biosynthesis and metabolism, which also enabled us to manipulate the pathway by modifying the expression of these genes in transgenic plants. In addition, new GA response mutants provided information about how signaling components are involved in feedback regulation of the GA biosynthetic pathway.read more
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Journal ArticleDOI
Gibberellin Metabolism and its Regulation
TL;DR: Current understanding of the GA biosynthesis and deactivation pathways in plants and fungi is summarized, and how GA concentrations in plant tissues are regulated during development and in response to environmental stimuli is discussed.
Journal ArticleDOI
Gibberellin signaling: biosynthesis, catabolism, and response pathways.
TL;DR: The power of molecular genetics has dramatically advanced the understanding of all aspects of gibberellin signaling, and many genes encoding GA response pathway components have been identified using Arabidopsis and cereal mutants.
Journal ArticleDOI
Gibberellin Biosynthesis and Response during Arabidopsis Seed Germination
TL;DR: In situ hybridization analysis demonstrated that the expression of GA-responsive genes is not restricted to the predicted site of GA biosynthesis, suggesting that GA itself, or GA signals, is transmitted across different cell types during Arabidopsis seed germination.
Journal ArticleDOI
Molecular mechanism of gibberellin signaling in plants
Tai-ping Sun,Frank Gubler +1 more
TL;DR: Evidence indicates that the DELLA proteins are targeted for degradation by an E3 ubiquitin ligase SCF complex through the ubiquitIn-26S proteasome pathway.
Journal ArticleDOI
1-Deoxy-d-xylulose-5-phosphate Synthase, a Limiting Enzyme for Plastidic Isoprenoid Biosynthesis in Plants
TL;DR: The results suggest that in plastids the pool of isopentenyl diphosphate is limiting to isprenoid production, and this enzyme catalyzes one of the rate-limiting steps of the MEP biosynthetic pathway.