Abstract
Aphanomyces frigidophilus sp. nov. was obtained from eggs of Japanese char,Salvelinus leucomaenis, from Tochigi Prefectural Fisheries Experimental Station, Utsunomiya, Japan. Vegetative hyphae were delicate, slightly wavy, moderately branched. Zoosporangia were isodiametric with the vegetative hyphae. Oogonia were abundant, originating on short stalks from lateral sides of hyphae. Oogonia were spherical, subspherical or pyriform, with a single subcentric oospore inside. Outer surfaces of oogonia were roughened with short papillate, crenulate or irregular ornaments. Antheridia and oospore germination were not observed. Zoospore germination and vegetative growth were found from pH 5.0 to 11.0. Zoospore production was highest at 10°C, whereas rapid growth occurred at 20–25°C. Vegetative growth of the fungus declined from the maximal level at 25°C to less than half maximal at 30°C and completely disappeared at 35°C.
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Kitancharoen, N., Hatai, K. Aphanomyces frigidophilus sp. nov. from eggs of Japanese char,Salvelinus leucomaenis . Mycoscience 38, 135–140 (1997). https://doi.org/10.1007/BF02460848
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DOI: https://doi.org/10.1007/BF02460848