47.ジベレリンおよびジベレリン生合成阻害剤処理によるネギの分げつ発生の制御(口頭発表)

概要

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Tillering is an important determinant of quality in Japanese bunching onion (Allium fistulosum L.). When tillers arise, plants of Japanese bunching onion have thin and flat leaf blades. To clarify the involvement of gibberellin (GA) in control of tillering in Japanese bunching onion, we conducted an experiment using GA_3 and GA-biosynthesis inhibitor. Application of uniconazole (UCZ), a GA-biosynthesis inhibitor, delayed the differentiation of first axillary buds. This effect of UCZ was denied by GA_3 application. In comparison with control plants, plants treated with GA_3 had more tillers. Plants treated with UCZ had fewer tillers, but they showed a drastic increase of the number of tillers after GA_3 application. These results suggest that GA takes an important role in control of tillering in Japanese bunching onion.
2008-10-06