オキナワモズクの養殖に関する研究-5-単子嚢の遊走子の発生

概要

論文の詳細を見る
The morphogenesis of zoospore from a unilocular sporangium, and the influence of water temperature, salinity and illumination on the growth of the gametophyte were examined in the laboratory. 1) The sporophytes produced unilocular and plurilocular zoosporangia on the same individual. Therefore, in order to extirpate the plurilocular zoosporangium, without damaging the unilocular sporangium, the following method was adopted: The sporophytes were immersed in sea-water containing 1% active chlorine for two minutes, and by so doing, the plurilocular zoosporangia at the surface of the sporo-phyte were completely extirpated, while the discharging of zoospores out of the unilocular sporangium was left normal. 2) The development of zoospore from unilocular sporangia showed the discoid type. At 15 days of growth at 25°C, the gametophytes formed many erect assimilatory filaments and plurilocular gametangia on the surface of discs, and discharged gametes. At the age of 30 days, the gametophytes attained up to 1.4mm in diameter of discs, but the growth of their assimilatory filaments reached no more than 150μ in height. 3) Concerning adequate culture conditions for the growth of gametophytes, best growth occurred at 25°C water temperature, 23‰ salinity and 5 klx illuminance; while the plurilocular gametangia were formed under the following culture condi-tions, 20-30°C water temperature, 23-35‰ salinity and 2-20 klx illuminance.
日本水産學會の論文