アマノリ類に寄生する壺状菌について
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概要
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A Chytridean parasite was frequently found on the fronds of cultured Porphyra. It occurred in several culture fields along the coast of central and northern Japan, especially in the north-eastern region, and it appeared for almost all culture-seasons covering from November till March, especially during November till January. The fungus, perhaps a new species belonging to the Olpidiopsis of Archymycetes, is parasitic on the living individual cell of, not only the mature frond, young sprout, but also the germling and free carpo-, mono-spore and vegetative cell. In the case of germling of carpo-spore, the fungus attacked both the original spore-cell and the filament of the filamentous-germling developed on the glass slide, while in the Conchocelis-germling on the bivalva shell it did not attack the filament penetrated into the shell. The fungus grows intracellularly in the cell of the Porphyra, and kills the host-cell in slow space. It is colorless, globular or ovoid with 7.5-13μ (mostly 9.5-l0μ) in size, contains many minute globules. In mature it protrudes out a small tube outside the cell-wall, and produce 4-16 spores within the cell. The spore is also colorless, reniform or irregular shaped, and has 2 long similar flagella on the ventral side. Escaping from the mother cell, it swims about rather quickly, without any phototactic movement, and then becomes rest losing the flagella, spheric with 3.0-5.Oμ(mostly 4.5μ) in size. The spore infests into a new host immediately after attaching it. The present fungus, Olpidiopsis n. sp., was seen only on the Porphyra, therefore 'the chytrid disease of Porphyra' was given to this parasitism. We could not correctly estimate the extent of damage of the disease, but it seemed to be rather smaller for the mature fronds while rather severe for the young sprouts and free spores. In addition, it seemed most probable that late Prof. YENDO (1919) had took this Chytridean parasite for the male and female swarming gametes of the Porphyra.
- 社団法人 日本水産学会の論文
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関連論文
- アサクサノリの腐敗病に関する研究
- Studies on the Gloiopeltis furcata in Iseand Mikawa-bay (2)
- Studies on the Gloiopeltis furcata in Ise-and Mikawa-bay (1)
- On The Monostroma found in Ise-and Mikawa-Bay
- アマノリ類に寄生する壺状菌について