Title: Promotive Effect of Pseudogibberellin A1 on Leaf Sheath Elongation of the 'Tan-ginbozu' Dwarf of Oryza sativa
Abstract: Pseudogibberellin Al (PSGA1) is identical to gibberellin Al (GA1) except for the a-oriented hydroxyl group on the ring A as compared to the (3-oriented hydroxyl group of GA1.This compound has been shown to be slightly active in cucumber hypocotyl elongation and more active in the leaf sheath elongation of the dwarf-5 mutant of maize).However, the activity has not been demonstrated in the rice seedling assay using normal varieties)-9'.The present report will show that PSGA1 is active in the leaf sheath elongation of the Tan-ginbozu dwarf of rice.