作物体内におけるジベレリン代謝の生理的意義 : 第3報 各種植物の葉におけるGA_3グルコサイドの生成

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  • 作物体内におけるジベレリン代謝の生理的意義-3-各種植物の葉におけるGA3グルコサイドの生成
  • サクモツタイナイ ニ オケル ジベレリン タイシャ ノ セイリテキ イギ 3
  • Physiological Meanings of Gibberellin Metabolism in Crop Plants : III. Formation of GA_3-glucoside in the leaves of various kinds of plants

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1.8科,50種,122品種の植物の葉について,GA_3吸収時におけるGA_3グルコサイドの生成度合を,rice seedling testにより調査した。2.GA_3グルコサイドの生成度合について,インゲンにみられたような品種間差異が,他の植物についてもみられるか,否かを調査するため,イネ,ダイズ,ササゲ,エンドウについては,とくに多数の品種を供試した。しかし,本実験の範囲では,顕著な品種間差異を認めることができなかった。3.植物の種類によっては,GA_3グルコサイドの生成度合に差が認められ,また,科によって,一定の傾向がみられた。すなわち,本実験の範囲では,イネ科,ナス科,バラ科の植物は,GA_3グルコサイドの生成が困難であり,マメ科,ヒルガオ科,キク科の植物は,GA_3グルコサイドの生成が顕著であった。

In this experiment, the degrees of GA_3-glucoside formation in the leaves after treatment with GA_3 were investigated on various kinds of plants belonging to 8 families, 50 genera, and 122 species. The formation of GA_3-glucoside was confirmed in the following way. After GA_3 absorption for three days, the leaves were extracted with 70 per cent acetone. The extract of those leaves was concentrated under reduced pressure. The residue was then adjusted to pH 2.5, and was shaken with ethylacetate and continuously with n-butanol. Only the gibberellin in the n-butanol fraction was examined by the rice seedling test after paperchromatographic development with ammoniacal iso-propanol. The growth promoting substance at Rf 0.3-0.4 on the chromatogram was regarded as GA_3-glucoside. The degrees of GA_3-glucoside formation in various plants are summarized in Table 2. It was hardly observed that the degrees of GA_3-glucoside formation in the leaves were influenced by the differences of varieties. This result was not in accordance with the case of kidney bean plant. On the other hand, those degrees were influenced by the differences of species, and the plants belonging to the same family had the same tendency. For instance, the plants belonging to Leguminosae and Convolvulaceae had the tendency to form GA_3-glucoside in the leaves, and the plants belonging to Gramineae, Rosaceae, and Solanaceae had the tendency not to form GA_3-glucoside.

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