Studies on the Flower Initiation in <i>Pharbitis</i> Seedlings I

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  • WADA Kiyomi
    Biological Institute, Faculty of Science, Shizuoka University

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Other Title
  • アサガオの花芽分化についての研究
  • アサガオの花芽分化についての研究 とくに莖頂の令(age),および葉・花葉原基の莖頂での分化速度の比較〔英文〕
  • アサガオ ノ カガ ブンカ ニ ツイテ ノ ケンキュウ トクニ ケイチョウ ノ レイ age , オヨビ ハ ハナ ヨウ ゲンキ ノ ケイチョウ デ ノ ブンカ ソクド ノ ヒカク エイブン
  • Studies on the Flower Initiation in Pharbitis Seedlings I
  • Ages of Shoot Apices and Initiation Rates of Leaf Primordia at the Shoot Apex
  • とくに茎頂の令(age), および葉•花葉原基の茎頂での分化速度の比較

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Based on a microscopic observation of external-morphological changes of Pharbitis shoot apices, the shoot apex stages were determined, the ages of shoot apices were expressed numerically, and the initiation rates of leaf primordia were calculated graphically.<br>The initiation of leaf primordia at the shoot apex was accelerated by flowerinductive dark treatments. This acceleration was evident, even before the floral organ was recognized under dissecting microscope, within three to four days after an inductive dark period. It may be said that the first sign of flower initiation is an acceleration of the initiation rate of leaf primordia at the shoot apex.

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