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Chemical constituents of Malagasy liverworts, part II: mastigophoric acid methyl ester of biogenetic interest from Mastigophora diclados (Lepicoleaceae Subf. Mastigophoroideae).

In the course of our chemotaxonomic study of the liverworts growing in Madagascar, mastigophoric acid methyl ester, along with eleven known compounds were isolated from Mastigophora diclados. Isolated metabolites showed that the Malagasy Mastigophora is more related to the samples from Borneo and Japan than to the Taiwanese or Malaysian ones. The biosynthesis of the herbertane type sesquiterpenoids from Mastigophora diclados is suggested to be similar to those found in the genus Herbertus. The herbertane-type sesquiterpenoids were screened for Staphylococcus aureus strain inhibition.

Acids↗

[Effect of the parasitic dinoflagellate Ellobiopsis chattoni (Protozoa: Mastigophora) on the winter mortality of the calanoid copepod Calanus finmarchicus (Crustacea: Copepoda) in the Norwegian Sea].

We studied the effects of the parasitic dinoflagellate Ellobiopsis chattoni on the winter mortality of natural population of the calanoid copepod Calanus finmarchicus in the Norwegian Sea (materials was collected in March-April 1989 and September 1990). Dinoflagellate infection occurred during autumn (the infection rates of copepods with E. chattoni was 15%, as average). Average mortality rate in C. finmarchicus was about 0.08% per day, or about one-tenth of total mortality in winter period.

Animals↗

Development of Trypanoplasma borreli (Mastigophora: Kinetoplastida) in the leech vector Piscicola geometra and its infectivity for the common carp, Cyprinus carpio.

The development of Trypanoplasma borreli in the crop of the leech vector Piscicola geometra was characterized by significant changes in morphology. Immediately after ingestion by the leech, stumpy-shaped T. borreli predominated and numerous dividing specimens were found. This led to long and slender trypanoplasms near the end of the infection. The infection was terminated with complete digestion of the blood stored in the crop of the leech. The longest period of infection observed was 11 days. Trypanoplasma borreli was found only in the crop of the leech. At any time during the infection, T. borreli isolated from P. geometra cause a parasitemia when inoculated into parasite-free carp. There was no difference in morphology or infectivity among T. borreli isolated from various crop regions of P. geometra.

Animals↗