ホソメコンブ配偶体の生長・成熟に及ぼす窒素・リンの影響

DOI 日本農学文献記事索引 Web Site 参考文献13件
  • 水田 浩之
    Laboratory of Breeding Science, Graduate School of Fisheries Science, Hokkaido University
  • 鳴海 日出人
    Nippon Data Service Co. Ltd
  • 山本 弘敏
    Laboratory of Breeding Science, Graduate School of Fisheries Science, Hokkaido University

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タイトル別名
  • Effects of Nitrate and Phosphate on the Growth and Maturation of Gametophytes of Laminaria religiosa Miyabe(Phaeophyceae).

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Zoospores of Laminaria religiosa were cultured for 81-97 days in different nitrate (0-100 μM) and phosphate (0-10 μM) concentrations in order to examine the effects of nitrate and phosphate on the growth and maturation of gametophytes in batch culture. The female gametophytes matured and formed sporophytes at concentrations of more than 5.0 μM nitrate and more than 1.0 μM phosphate. These are the critical levels necessary for allowing the development from a gametophyte into a sporophyte, in cases when the maturation of the gametophyte is limited by both nitrate and phosphate. The critical nitrate concentration decreased to 1.0 μM when the phosphate concentration was sufficient, and the critical phosphate concentration similarly decreased to 0.5 μM when the nitrate level was sufficient, indicating that the critical concentration is affected by the synergy between the concentrations of two nutrients. The effects of irradiance (0.76-14.8 μE/m2/s) and water temperature (5-15°C) on gametophyte maturation and sporophyte formation were also examined in six nutrient concentrations. Low nutrient concentration or low irradiance independently delayed maturation and formation, showing that the reproduction of L. religiosa gametophytes is controlled by the accumulation of nutrients in a plant and by quantum dose.

収録刊行物

  • 水産増殖

    水産増殖 49 (2), 175-180, 2001

    日本水産増殖学会

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