期刊
FOLIA BIOLOGICA-KRAKOW
卷 64, 期 1, 页码 47-54出版社
POLISH ACAD SCIENCES, INST SYSTEMATICS EVOLUTION ANIMALS
DOI: 10.3409/fb64_1.47
关键词
Paramecium bursaria; chloroplast 3 'rp136-5 'infA gene fragment; LSU rDNA; Chlorella vulgaris; Chlorella variabilis; Micractinium conductrix
类别
Paramecium bursaria (EHRENBERG 1831), a freshwater ciliate, typically harbors hundreds of green algal symbionts inside the cell. The aim of present study was the molecular identification of newly analyzed P. bursaria symbionts. The second aspect of the present survey was testing a hypothesis whether endosymbionts prefer the specified syngen of the host, and the specified geographical distribution. Ten strains of endosymbionts isolated from strains of P. bursaria originating from different geographical locations were studied. We analyzed for the first time, both the fragment of plastid genome containing 3 'rp136-5' infA genes and a fragment of a nuclear gene encoding large subunit ribosomal RNA (LSU rDNA). The analysis of the LSU rDNA sequences showed the existence of 3 haplotypes and the haplotype diversity of 0.733, and 8 haplotypes for the 3' rp136-5' infA gene fragment and haplotype diversity of 0.956. The endosymbionts isolated from P. bursaria strains were identified as Chlorella vulgaris, Ch. variabilis and Micractinium conductrix. There was no correlation between the syngen of P. bursaria and the species of endosymbiont.
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