Age-Dependent and Tissue-Specific Alterations in the rDNA Clusters of the C. A. Meyer Cultivated Cell Lines.

Long-term cultivation of cell lines leads to a decreasing synthesis of the biologically active substances used in traditional medicine. To gain insight into the cellular mechanisms which may influence this process, we analyzed variations within the rDNA cluster of the Oriental ginseng cell lines. The cell lines were cultivated for 6 and 24 years; the number of nucleoli and chromosomes was analyzed.

Stephanoprora chasanensis n. sp. (Digenea: Echinochasmidae): Morphology, life cycle, and molecular data.

Echinostomatoidea is a large, globally distributed and heterogeneous group of hermaphroditic digeneans that parasite, as adults, vertebrate hosts of all classes. Species of this group have received attention from researchers as they can cause diseases in wildlife and humans. Here we describe the biological and molecular phylogenetic characteristics of Stephanoprora chasanensis n.

Variation in the number of nucleoli and incomplete homogenization of 18S ribosomal DNA sequences in leaf cells of the cultivated Oriental ginseng (Panax ginseng Meyer).

Background: Wild ginseng, Panax ginseng Meyer, is an endangered species of medicinal plants. In the present study, we analyzed variations within the ribosomal DNA (rDNA) cluster to gain insight into the genetic diversity of the Oriental ginseng, P. ginseng, at artificial plant cultivation.

Phylogenetic relationships of Paradiclybothrium pacificum and Diclybothrium armatum (Monogenoidea: Diclybothriidae) inferred from 18S rDNA sequence data.

The Diclybothriidae (Monogenoidea: Oligonchoinea) includes specific parasites of fishes assigned to the ancient order Acipenseriformes. Phylogeny of the Diclybothriidae is still unclear despite several systematic studies based on morphological characters. Together with the closely related Hexabothriidae represented by parasites of sharks and ray-fishes, the position of Diclybothriidae in different taxonomical systems has been matter of discussion.

Phylogeny based on two mtDNA genes (Co-1, Cyt-B) among Sculpins (Scorpaeniformes, Cottidae) and some other scorpionfish in the Russian Far East.

The average scores of p-distances at Co-1 and Cyt-b genes revealed a pattern of increased nucleotide diversity for four categories: (1) intraspecies, (2) intragenus, (3) intrafamily, and (4) intraorder. Scores for Co-1 genes were following: (1) 0.24 ± 0.