Environmental factors influencing sporocarp formation in <Emphasis Type="Italic">Typhula ishikariensis</Emphasis> |
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| Authors: | Email author" target="_blank">Akira?KawakamiEmail author Naoyuki?Matsumoto Shigeo?Naito |
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| Institution: | (1) National Agricultural Research Center for Hokkaido Region, Winter Stress Laboratory, 1 Hitsujigaoka, Toyohira, Sapporo, 062-8555, Japan;(2) National Institute for Agro-Environmental Sciences, Tsukuba, Japan;(3) Graduate School of Agriculture, Hokkaido University, Sapporo, Japan |
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| Abstract: | Environmental factors influencing sporocarp formation in Typhula ishikariensis were studied under controlled conditions. Sporocarp formation in T. ishikariensis was divided into two stages: stipe elongation from the sclerotium and fertile head development at the tip of the stipe. Factors required for each stage differed. At the stipe elongation stage, low temperature (10°/5°C; day/night) and high humidity were important, but light was not required. In contrast, at the fertile head stage, light and moderate day length (8 h/day) were essential. Fertile heads developed at 46µEm–2s–1; and high intensity (137µEm–2s–1) did not suppress development. Moreover, adding unsterilized soil to the sea sand medium accelerated sporocarp formation. These findings imply that the sclerotium of T. ishikariensis recognizes several physical factors for sporocarp formation. Sporocarps of T. ishikariensis developed within 4 weeks after incubation under optimal conditions. The sporocarp produced basidiospores, and differential mating incompatibility was confirmed among monokaryons derived from basidiospores produced under artificial conditions. This method should be useful for obtaining monokaryons for genetic studies of T. ishikariensis. |
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| Keywords: | Speckled snow mold Typhula ishikariensis Basidiospore Sporocarp formation Environmental factor |
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