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

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概要

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• 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.

• 日本植物生理学会の論文

著者

• SUZUKI Yoshihito

  Department of Applied Biological Chemistry, The University of Tokyo

• MUROFUSHI Noboru

  Faculty of Bioresource Sciences, Akita Prefectural University

• YAMAGUCHI Isomaro

  Department of Applied Biological Chemistry, The University of Tokyo

• MUROFUSHI Noboru

  Department of Biotechnology, Akita Prefectural University

• Maejima Noboru

  Department Of Biotechnology Akita Prefectural University

• Suzuki Y

  Department Of Global Epidemiology Hokkaido University Research Center For Zoonosis Control

• YANG Young-Yell

  Plant Science Center, RIKEN

• Yamaguchi Isomaro

  Department Of Applied Biological Chemistry The University Of Tokyo

• Yoshida Shigeo

  Plant Functions Lab. The Inst. Of Phys. And Chem. Res. (riken)

• Murofushi Noboru

  Department Of Agricultural Chemistry The University Of Tokyo

• Suzuki Yoshihito

  Department Of Applied Biological Chemistry The University Of Tokyo

• Yamaguchi Isomaro

  Department Of Agricultural Chemistry Faculty Of Agricultural Science University Of Tokyo

• Yamaguchi I

  Department Of Applied Biological Chemistry University Of Tokyo

• Suzuki Y

  Research Institute For Bioresources Okayama University

• Yang Young-yell

  Plant Science Center Riken

• Yang Young-Yell

  Department of Agricultural Chemistry, The University of Tokyo

• TAKENO-WADA Kiyoshi

  Laboratory of Horticulture, Faculty of Agriculture, Tohoku University

• Takeno-wada Kiyoshi

  Laboratory Of Horticulture Faculty Of Agriculture Tohoku University:(present)laboratory Of Horticult

• Suzuki Yoshihito

  Department Of Applied Biological Chemistry Graduate School Of Agricultural And Life Sciences The Uni

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