アサクサノリの果胞子付けに関する二･三の実験

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  • アサクサノリ ノ カホウシ ズケ ニ カンスル ニ , サン ノ ジッケン
  • Some Experiments on Liberation and Adhesion of Carpospore of Porphyra tenera

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In this work, an experimental observation has been conducted on the liberation and the adhesion of carpospores of Porphyra tenera in the laboratory. The material was collected at spring tide and kept half-dry prior to the experiment. From the half-dried material, the great majority of healthy carpospores liberated within 2 days. However, in case of fronds kept in the sea water, the shedding of spores continued more than two weeks. The experiment revealed that approximately 20-50 per cent of liberated spores attached to the substratum and about 10 per cent of them developed into the Conchocelis-phase. Futher, in running sea water, the adhesion of spores tends to be easier and more in quantity in slow current than in fast. When the spore-containing water was poured into the vessel in which oyster shells were piled up togather, there was scarcely any difference between all shells in number of attached spores.

室内でアサクサノリの果胞子付けに関係がある胞子の放出や附着について実験観察を行つた.1.干出時に採集した葉体は一両日なら蔭干状態で,それ以上では海水中で保存した方が有効胞子が多く得られる.2.採集後海水中に活した葉体では2週間以上健全な胞子が放出されるが大多数は3～4日以内に放出された.3.胞子液による種付けでは全胞子の50～20%が附着し,約10%が穿孔した.4.水流と附着は逆相関し,水流が遅い程附着は良好であつた。5.水槽中で貝殻を堆積した後,胞子を含む海水を注入すると多数の殻に割合均一な胞子の附着が得られる.

長崎大学水産学部研究報告, v.7, pp.81-86; 1959

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