Gibberellin metabolism: new insights revealed by the genes.
The identification of most of the genes involved in the metabolic pathways for gibberellin hormones has helped us to understand these pathways and their regulation. Many of these enzymes are multifunctional and therefore fewer enzymes than might be expected are required to synthesize the various gibberellin structures. However, several of the enzymes are encoded by multiple genes that are regulated differently, adding unexpected genetic complexity. Several endogenous and environmental factors modify the expression of gibberellin biosynthesis genes, including developmental stage, hormonal status and light. A future challenge will be to dissect the complex, interacting pathways that mediate the regulation of gibberellin metabolism.
Hedden
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Crop Production and Improvement Dept, IACR Long Ashton Research Station, University of Bristol Dept of Agricultural Sciences, Long Ashton, Bristol, UK BS41 9AF. peter.hedden@bbsrc.ac.uk
Phillips
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AL
D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism; D017343:Genes, Plant; D005875:Gibberellins / Q000096:biosynthesis / Q000378:metabolism*; D006899:Mixed Function Oxygenases / Q000737:chemistry / Q000378:metabolism; D008969:Molecular Sequence Data; D005810:Multigene Family; D017386:Sequence Homology, Amino Acid; D015398:Signal Transduction
D005875:Gibberellins; D006899:Mixed Function Oxygenases