Effects of pH and temperature on growth ofSaprolegnia diclina andS. parasitica isolated from various sources |
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| Authors: | Nilubol Kitancharoen Kei Yuasa Kishio Hatai |
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| Institution: | (1) Division of Fish Diseases, Nippon Veterinary and Animal Science University, 1-7-1, Kyonan-cho, 180 Musashino, Tokyo, Japan;(2) Fisheries Aquaculture International Co., Ltd, No. 7 Kohji-machi Building, Room 105, 4-5, Kohji-machi, Chiyoda-ku, 102 Tokyo, Japan |
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| Abstract: | Saprolegnia diclina andS. parasitica isolated from three sources could germinate in strong acidic conditions. Growth ability correlated with the species of fungi
rather than with the sources from which they were isolated.S.diclina isolates appeared to germinate at a pH condition as low as 3.5, whereasS. parasitica isolates could not germinate at below pH 3.8.S. parasitica isolates from visceral mycoses still showed good growth at 30°C, whereas other isolates did not. Also,S. parasitica isolates from visceral mycoses produced more abundant motile zoospores, and continued to do so for a longer period of time
(28 d), thanS. parasitica isolates from external saprolegniasis andS. diclina isolates. |
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| Keywords: | pH Saprolegnia diclina Saprolegnia parasitica temperature |
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