Lanceispora amphibia gen. et sp. nov., a new amphisphaeriaceous ascomycete inhabiting senescent and fallen leaves of mangrove |
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Authors: | Akria Nakagiri Izumi Okane Tadayoshi Ito Ken Katumoto |
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Institution: | (1) Institute for Fermentation, Osaka, 17-85, Juso-honmachi 2-chome, Yodogawa-ku, 532 Osaka, Japan;(2) 2055-27, Oouchimihori, Yamaguchi, 753-02 Yamaguchi, Japan |
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Abstract: | Lanceispora amphibia gen. et sp. nov. in the Amphisphaeriaceae is described from senescent and fallen leaves ofBruguiera gymnorrhiza in mangrove forests in the Southwest Islands, Japan. The fungus produces immersed ascomata in leaf tissue, cylindrical asci
with an apical ring staining blue with iodine, and oblanceolate ascospores with a septum above the middle. Studies on the
fungal succession on the mangrove leaves revealed thatL. amphibia infects senescent leaves on the tree and inhabits intertidal fallen leaves, showing the highest frequency of occurrence at
the late stage of decomposition. In culture the optimal conditions for hyphal growth were 20 ppt salinity and 30°C, and those
for sexual reproduction were 10 ppt salinity and 25°C. Growth at 0 ppt (fresh water) was depressed. The fungus has amphibious
habits, growing on the tree and in intertidal water; and it is adapted to the high osmotic conditions in leaf tissues of the
mangrove tree and to the subtropical, brackish water environment of mangrove forests. |
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Keywords: | Bruguiera gymnorrhiza ecology Lanceispora amphibia mangrove taxonomy |
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