Metabolism and Translocation of Gibberellins in Seedlings of Pharbitis nil. : (I) Effect of Photoperiod on Stem Elongation and Endogenous Gibberellins in Cotyledons and Their Phloem Exudates : GROWTH AND DEVELOPMENT :

• YANG,Young-Yell

  Department of Applied Biological Chemistry, The University of Tokyo:(Present)Frontier Research Program, The Institute of Physical and Chemical Research(RIKEN)

• YAMAGUCHI,Isomaro

  Department of Applied Biological Chemistry, The University of Tokyo

• TAKENO-WADA,Kiyoshi

  Laboratory of Horticulture, Faculty of Agriculture, Tohoku University:(Present)Laboratory of Horticulture, Faculty of Agriculture, Nagoya University

• SUZUKI,Yoshihito

  Department of Applied Biological Chemistry, The University of Tokyo

• Murofushi,Noboru

  Department of Applied Biological Chemistry, The University of Tokyo

抄録

Gibberellin Al (GA_1), GA_<19>, and GA_<20> in phloem exudates and cotyledons of seedlings of Pharbitis nil cv. Violet, grown under different photoperiodic conditions, were qualitatively and semi-quantitatively analyzed by a combination of high performance-liquid chromatography (HPLC) and radioimmunoassays (RIA). The levels of GA_<19> and GA_<20> were higher in cotyledons from plants grown under dark treatment (DT) conditons of 16 h-light/8 h-dark for 6 days followed by 8 h-light/16 h-dark for 3 days than in those grown under continuous light (CL) for 9 days. This relationship was also observed for the GAS in phloem exudates, although the levels were much lower than in the cotyledons. When GAS were applied to the cotyledons, elongation of the epicotyl was promoted more by GA_<20> than by GA_1 or GA_<19>, especially under the CL treatment. The relative effect of GA_1 and GA_<20> on the epicotyl elongation was reversed when these GAS were applied to epicotyls pre-treated with prohexadione, an inhibitor of 2-oxoglutarate-dependent dioxygenases.

収録刊行物

• Plant and cell physiology

  Plant and cell physiology 36 (2), 221-227,

  Japanese Society of Plant Physiologists

キーワード

• gubberellins(Pharbitis nil)
• Pharbitis nil
• Photoperiod(Gibberellins)
• Radioimmunoassay(Gibberellins)
• Stem elongation(Photoperiod)

詳細情報

• CRID: 1544231895057883136
• NII論文ID: 110003720595
• NII書誌ID: AA0077511X
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10771556
• 本文言語コード: en
• データソース種別:
  • NDL-Digital
  • CiNii Articles