In vitroにおけるダイジョ(Dioscorea alata L.)幼植物の生育およびミニ塊茎の肥大生長に及ぼす植物生長調節物質の作用

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タイトル別名
  • Effects of Plant Growth Regulators on Plantlet Growth and Enlargement of Microtubers of Water Yam (Dioscorea alata L.) In Vitro.
  • In vitro ニ オケル ダイジョ Dioscorea alata L ヨウショクブツ ノ セイイク オヨビ ミニ カイケイ ノ ヒダイ セイチョウ ニ オヨボス ショクブツ セイチョウ チョウセツ ブッシツ ノ サヨウ

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It is well known that jasmonic acid and related compounds are plant growth regulators associated with the growth of yam plants. Gibberellins (GA3) and abscisic acid (ABA) are also considered to play a role in the growth of yam (Dioscoreaspp.) . Therefore, the effects of these three plant growth regulators on the growth of plantlets and enlargement of microtubers were examinedin vitro. JA-Me and GA3promoted the enlargement of microtubers, while ABA exerted an inhibitory effect on them. Combination of ABA with GA3led to a decrease of the inhibitory effect of ABA and the promoting effect of GA3, respectively. The similar results were obtained in the combination of ABA and JA-Me. These results indicated that ABA exerted an antagonistic effect on JA-Me and GA3 in the enlargement of microtubers. No synergistic effects of JA-Me with GA3were observed. On the other hand, ABA inhibited the stem elongation of yam plantlets. Furthermore, GA3, which generally promotes stem elongation in other plants, also strongly inhibited it. These results suggested that water yam showed an unusual growth response to GA3.

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  • 熱帯農業

    熱帯農業 45 (2), 142-147, 2001

    日本熱帯農業学会

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