Microheterogeneity and Coevolution
Description
Citation
| Title | Microheterogeneity and Coevolution: An Examination of rDNA Sequence Characteristics in Neoparamoeba pemaquidensis and Its Prokinetoplastid Endosymbiont |
| Author(s) | C. Caraguel , C. O'Kelly , P. Legendre , S. Frasca , R. Gast, B. Despres , R. Cawthorn, S. Greenwood |
| Journal | The Journal of eukaryotic microbiology |
| Date | 2007 |
| Volume | 54 |
| Issue | 5 |
| Start page | 418 |
| End page | 426 |
| Abstract | ABSTRACT. Neoparamoeba pemaquidensis, the etiological agent of amoebic gill disease, has shown surprising sequence variability among different copies of the 18S ribosomal RNA gene within an isolate. This intra-genomic microheterogeneity was confirmed and extended to an analysis of the internal transcribed spacer (ITS) region. High levels of intra-genomic nucleotide diversity (Pi=0.0201-0.0313) were found among sequenced ITS regions from individual host amoeba isolates. In contrast, the ITS region of its endosymbiont revealed significantly lower levels of intra-genomic nucleotide diversity (Pi=0.0028-0.0056) compared with the host N. pemaquidensis. Phylogenetic and ParaFit coevolution analyses involving N. pemaquidensis isolates and their respective endosymbionts confirmed a significant coevolutionary relationship between the two protists. The observation of non-shared microheterogeneity and coevolution emphasizes the complexity of the interactions between N. pemaquidensis and its obligate endosymbiont. |
| DOI | 10.1111/j.1550-7408.2007.00281.x |
Using APA 6th Edition citation style.
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