Quantitative Analysis of Endogenous Gibberellins in Normal and Dwarf Cultivars of Rice

摘要: Endogenous levels of gibberellins in shoots and ears of two dwarf rice (Oryza sativa L.) cultivars, Tan-ginbozu (dx mutant) and Waito-C (dy mutant), were analyzed and compared with those of normal rice cultivar, Nihonbare. The endogenous levels of 13-hydroxylated gibberellins in Tan-ginbozu were much lower than those in Nihonbare. In Waito-C, the levels of GA19 and GA20 in the shoots were higher but that of GA1 was lower than the levels of these gibberellins in Nihonbare. These results support the hypothesis that the dy gene …