I. Honda et al., CHARACTERIZATION OF ENDOGENOUS GIBBERELLINS IN DWARF RICE MUTANTS, Bioscience, biotechnology, and biochemistry, 60(12), 1996, pp. 2073-2075
The elongation response of 17 near-isogenic dwarf lines of the Shiokar
i rice cultivar to gibberellins (GAs) was examined. Two strains, ID-18
h and ID-19, were selected for further analysis of their endogenous GA
levels. It is suggested that ID-18h dwarfism is caused by the deficie
ncy of GA 3 beta-hydroxylation activity, and ID-19 dwarfism by the ins
ensitivity of the elongation response to physiologically active GAs.