Isolation and characterization of a novel mutation that confers gibberellin-sensitive dwarfism inArabidopsis thaliana

摘要: Gibberellins (GAs) regulate diverse aspects of plant growth and development. Despite extensive analysis the GA-metabolic pathway, only a few genes have been identified as regulatory components GA metabolism. In searching for those genes, we screened isolated novel dominant mutant,GA-sensitive dwarf1-1D (gsd1-1D), fromArabidopsis thaliana. This mutant exhibited characteristic phenotypes GA-deficient mutants, including semi-dwarfism, dark-green leaves, late-flowering, reduced fertility. Exogenously applied rescued thegsd1-1D phenotypes, implying that this phenomenon was likely due to level GA. Likewise, transcripts GA-responsive were affected by thisgsd1-1D mutation, which genetic showed be semi-dominant monogenic. Chromosomal mapping theGSD1 locus indicated it resides on middle Chromosome 3, where no loci related metabolism exist. These results suggest encodes component controlling bioactive inA.