| Project/Area Number |
02640541
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
植物形態・分類学
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
IWATSUKI Zennosuke Hiroshima U., Fac. of Sci., Prof., 理学部, 教授 (80072809)
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| Co-Investigator(Kenkyū-buntansha) |
HIGUCHI Masanobu Hiroshima U., Fac. of Sci., Rese. Asso, 理学部, 助手 (10189772)
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| Project Period (FY) |
1990 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1992: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1991: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1990: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | Japanese mosses / Speciation / Plant taxonomy / Sexuality / Peristome teeth / Vegetative diaspores / 日本産蘇類 / さく歯 / 無性生殖器官 / 蘚類 / 苔類 / 日本 / イソ酵素 / 〓歯 / 胞子 / 長距離散布 |
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| Research Abstract |
As the basic data of this research, all moss species recorded from Japan were listed. This list is comprised of 1180 species belonging to 321 genera. Moss flora of Japan is remarkably rich as it contains almost the same number of species with that of whole North America.
The affinities of the Japanese moss flora with those of eastern North America and western North America were investigated. The list of moss species of the eastern North American element in the Japanese moss flora is revised to 33 species and a list of 11pairs of vicarious taxa of mosses in these two regions is provided. Possible speciations of these species were discussed.
Structure and movement of peristome filaments of many Japanese species of the genus Fissidens were studied. All species of the subgenera Aneruron and Fissidens examined show hygroscopical movement of peristome filamtnes. The filaments are spirally thickened and not nodose. On the contrary, all species of the subgenera Serridium and Pachyfissidens have nodose peristome filaments and do not show hygroscopic movement. Differentiation of peristome teeth is important for the classification of subgenera of Fissidens.
Various types of vegetative diaspores of Japanese mosses were examined. They are classified into two groups, propagules and gemmae. Vegetative diaspores are important for distribution of mosses. Speciation of mosses based on vegetative diaspores was discussed.
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