Plant Growth-Regulating Activities of 3-Hydroxy-5-methyl Isoxazole : I. Effects of 3-hydroxy-5-methyl isoxazole and metabolites in plants on growth of rice seedlings

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  • 3-ヒドロキシ-5-メチルイソキサゾールの作物の生育調節作用に関する研究 : 第1報 3-ヒドロキシ-5-メチルイソキサゾールおよび植物体内代謝産物がイネ苗の生育に及ぼす影響
  • 3-ヒドロキシ-5-メチルイソキサゾールの作物の生育調節作用に関する研究-1-3-ヒドロキシ-5-メチルイソキサゾールおよび植物体内代謝産物がイネ苗の生育に及ぼす影響
  • 3-ヒドロキシ-5-メチルイソキサゾール ノ サクモツ ノ セイイク チョウセツ サヨウ ニ カンスル ケンキュウ 1 3-ヒドロキシ-5-メチルイソキサゾール オヨビ ショクブツタイナイ タイシャ サンブツ ガ イネ ナエ ノ セイイク ニ オヨボス エイキョウ

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Abstract

This investigation was conducted on rice seedlings to elucidate the plant growth-regulating properties of 3-hydroxy-5-methyl isoxazole which is an effective fungicide against the damping-off organism of rice seedlings. The results obtained are summarized as follows: 1) The promotion of root growth by 3-hydroxy-5-methyl isoxazole was assumed to be mediated by its metabolite (N-β-glucoside) in plants. 2) The formation and development of lateral roots and root hairs were accelerated in the early seedling stage. The root growth was vigorously promoted by 3-hydroxy-5-methyl isoxazole in the later seedling stage. 3) The rooting ability and root activity (oxidizing or reducing activity of roots) were enhanced by 3-hydroxy-5-methyl isoxazole.

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