Fruiting-body formation, cultivation properties, and host specificity of a fungicolous fungus, Asterophora lycoperdoides |
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Authors: | Hiroto Homma Hirofumi Shinoyama Mutsumi Tanibe Seigo Amachi Toshimitsu Fukiharu Takaaki Fujii |
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Institution: | (1) Laboratory of Microbial Engineering, Graduate School of Science and Technology, Chiba University, 648 Matsudo, Matsudo Chiba, 271-8510, Japan;(2) Natural History Museum and Institute, Chiba, Japan |
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Abstract: | We report the fruiting-body formation and cultivation properties of Asterophora lycoperdoides, a fungicolous fungus. Asterophora lycoperdoides formed fruiting bodies on potato dextrose agar medium in approximately 1 week, although this fungus shows high host specificity
to Russula nigricans in nature. Optimal temperature of mycelial growth and fruiting-body formation was 25°C. Mannitol or soluble starch was preferably
used as a carbon source, and amino nitrogen was preferably used as the nitrogen source. For a better understanding of the
relationship between A. lycoperdoides and R. nigricans, we cultivated A. lycoperdoides on media supplemented with freeze-dried fruiting bodies of various fungi. The germination rate was approximately 2.5 times
higher on the medium containing freeze-dried R. nigricans than that on the PDA medium. The mycelia extended most rapidly in the presence of R. nigricans. Furthermore, the stipe length of its fruiting body was the longest on the medium containing R. nigricans. These results indicated that A. lycoperdoides can grow faster by utilizing certain substances that are abundantly contained in R. nigricans, such as mannitol, or by utilizing R. nigricans itself. It is considered that the constituents of R. nigricans might contribute to the host specificity of A. lycoperdoides. |
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Keywords: | Basidiomycete Cultivation study Host– parasite specificity Mycoparasite Russula nigricans |
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