| Budget Amount *help |
¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1987: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1986: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Research Abstract |
As a sample of the asexual organisms for surveying methods to recognize the inter- and intra-specific relationships based on more genetical evidences instead of cross tests on the sexaul organisms, unicellular red algae selected.
More than 20 strains belonging to 7 genera 13 species were examined with electrophoresis of their fraction-1-proteins, isozymes and total organizing proteins, as well as usual criteira of their morphology, ultrastructure and photosynthetic pigments. The former examinations could not be suceeded due to thick mucilage substances of their cell coverings preventing to extract all of these proteins. I could not help examining the latter features in more detail, with additional informations of their asexual reproductions and habitat.
Unicellular red algae investigated in this study and published so far were classified into six groups; Cyanidium-,Rhodella- , Flintiella-, Rhodospora-, Rhodosorus- and Porphyridium-group. The first five are recognized to be an evolutionary group, each sharing a common pigmentation and chloroplast structure with a cline which has a gradual reduction in pyrenoid matrix and change in the chloroplast position from axile to peripheral. Each group, however, tends to inhabit a similar environment. In contrast, the sixth group is to be an ancestral stock for the other groups and multicellular red algae. This Prophyridium-group is characterized by a stellate chloroplast with an embedded pyrenoid. However, there is a variety of pigmentation in related to habitat.
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