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Microbial ecology
Aug, 2007;54 (2): 242-51.

Molecular evidence for polyphyletic origin of the primary symbionts of sucking lice (phthiraptera, anoplura).

Václav Hypsa, Jaroslav Krízek
Author Information
  1. Václav Hypsa: Faculty of Biological Sciences, Ceské Budejovice, Czech Republic. vacatko@paru.cas.cz
PMID: 17345136 DOI: 10.1007/s00248-006-9194-x

Abstract

Based on 16S rDNA analyses, the primary symbionts of sucking lice were found to form a polyphyletic assemblage of several distant lineages that have arisen several times within Enterobacteriaceae and at least once within Legionellaceae. Another independent lineage of endosymbiotic enterobacteria inhabits a sister group of the sucking lice, Rhynchophthirina. The inspection of 16S rDNA supports the symbiotic nature of the investigated bacteria; they display a typical trait of degenerative processes, an increased AT content (Adenine-Thymine content) in comparison with free-living bacteria. The calculation of divergence time between the closest anopluran and rhynchophthirine symbionts further support their independent origin. The results shown here, together with evidence from other groups, indicate that the significance of primary symbionts for blood-feeding insects should be reconsidered.

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MeSH Term

Animals
Bacteria
Bacterial Physiological Phenomena
Base Sequence
DNA, Mitochondrial
DNA, Ribosomal
Phthiraptera
RNA, Ribosomal, 16S
Symbiosis

Chemicals

DNA, Mitochondrial
DNA, Ribosomal
RNA, Ribosomal, 16S
Journal Article Research Support, Non-U.S. Gov't

Word Cloud

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