| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Filamentous green alga genus Spirogyra (Zygnemataceae) which often constructs a mat forming community in lake littoral, pond and streams, is a common genera found in freshwaters. The formation process of conjugation and zygospores of Spirogyra is a suitable teaching material introducing sexual reproduction in biology learning. Spirogyra species have been classified by the shape and color of conjugation and fully-ripened zygospores. Although conjugation and zygospore development of Spirogyra are a well-known phenomenon, little is understood about their detailed processes and mechanism, because of the difficulty in artificial reproducible induction of conjugation in laboratory experiments. Consequently, ecological studies of Spirogyra were almost unidentified the species. Results of this study suggest that some species of Spirogyra might be propagating in spring and forming zygospores in late spring to early summer. However, the mechanism is still not clear.
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