アサクサノリの胞子の放出,浮游及び着生 海藻胞子付けの研究第9報

抄録

1. Monospores
Shedding occurs when the tide is rising. About 10³ spores are shed from 1cm² of plant in a flood tide. 10² spores were found in 1 L. of sea water in flood tide.
Monospores fix themselves to substrata within one minute, especially to those which are being washed by waves at flood tide.
They develop normally in 1 to 2 days after their fixation.
2. Carpospores
Shedding and fixing habits-of carpospores are quite different from those of monospores and of all the spores of other algae which develop soon. The latter spores shed periodically and the number of spores shed decrease day by day in culture. Their fixing ability is the strongest just after the shedding and they develop normally soon after the fixation. While carpospores of Porphyra sweep out from the margin of plants little by little into the sea accompanied by their mother cells. The number increases day by day in culture. Most of them have no fixing ability and a greater part of them develop abnormally. These facts suggest the possibility that carpospores in winter do not develop soon, but that they may rest during early spring to early autumn in the sea (Kunieda 1939).