Inducible Conditions for Sorus Formation of the Sporophyte Discs of Laminaria japonica Areschoug(Phaeophyceae)
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- Mizuta Hiroyuki
- Laboratory of Aquatic Breeding Science. Faculty of Fisheries Science, Hokkaido University
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- Nimura Kazumi
- Laboratory of Aquatic Breeding Science. Faculty of Fisheries Science, Hokkaido University
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- Yamamoto Hirotoshi
- Laboratory of Aquatic Breeding Science. Faculty of Fisheries Science, Hokkaido University
書誌事項
- タイトル別名
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- Inducible Conditions for Sorus Formation of the Sporophyte Discs of <i>Laminaria japonica</i> Areschoug (Phaeophyceae)
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Optimal conditions for sorus formation of Laminaria japonica were investigated by culturing discs of the sporophyte in bottles. All discs formed sori in the seven combinational conditions of temperature (5-15°C), irradiance (33.2-116 μE•m-2•s-1) and photoperiods (16:8, 12:12 and 8:16h LD) in nutrientrich medium. Sorus formation occurred earlier at 15°C than at 5 and 10°C and were largest in the area at 15°C. Sori grew larger under high irradiance (116 μE•m-2•s-1) than under low irradiances (66.4 and 33.2 μE•m-2•s-1), but the initiation of sorus formation was not influenced by irradiance. Sorus formation was earlier in 8:16h LD than in 12:12 and 16:8h LD. Rapid formation of large sori occurred at high temperatures even in a long photoperiod. Sorus formation in discs in nutrient-poor medium was slower than that in discs in nutrient-rich medium, in which all discs formed large sori. Most discs in nutrient-poor medium formed very small sori. These results indicate that water temperature and nutrient conditions strongly affect both to the induction and expansion of sorus formation.
収録刊行物
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- Ｆｉｓｈｅｒｉｅｓ ｓｃｉｅｎｃｅ
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Ｆｉｓｈｅｒｉｅｓ ｓｃｉｅｎｃｅ 65 (1), 104-108, 1999
公益社団法人 日本水産学会
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詳細情報 詳細情報について
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- CRID
- 1390001204429029120
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- NII論文ID
- 130003903304
- 10004877637
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- NII書誌ID
- AA10993718
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- NDL書誌ID
- 4666166
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- ISSN
- 09199268
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- 使用不可