Flower-Inducing Activity of Phloem Exudates from Pharbitis cotyledons Exposed to Various Photoperiods :

• Ishioka,Nahoko

  Cenetic Engineering Laboratory, Faculty of Agriculture, Saga University

• Tanimoto,Shizufumi

  Cenetic Engineering Laboratory, Faculty of Agriculture, Saga University

• Harada,Hiroshi

  Institute of BioLogicaL Sciences, University of Tsukuba

抄録

The phloem exudate prepared from the cotyledons of Pharbitis seedlings that had been exposed to a single dark period (of longer than 10 h) induced flowering in cultured apices excised from non-induced seedlings. The flower-inducing activity of the exudate increased as the seedlings were exposed to longer periods of darkness. The highest activity was associated with the exudate taken from cotyledons exposed to a single 16-h dark period. The activity of the exudate taken from cotyledons exposed to an inductive dark period was clearly reduced by interruption of the dark period. The addition of exudate taken from three cotyledons to 10 ml of medium resulted in the highest flower-inducing activity. About 50% of cultured apex explants formed floral buds, even when the concentration of the exudate was reduced to O.1 cotyledon equivalents per 10 ml of medium. The flower-inducing activity of the exudate appeared to be heat-stable.

収録刊行物

• Plant and cell physiology

  Plant and cell physiology 32 (7), 921-924,

  Japanese Society of Plant Physiologists

キーワード

• Apex culture
• Flower formation
• Pharbitis nil
• Phloem exudates

詳細情報

• CRID: 1542261570220807936
• NII論文ID: 110003720006
• NII書誌ID: AA0077511X
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10770767
• 本文言語コード: en
• データソース種別:
  • NDL-Digital
  • CiNii Articles