Abstract：
:Previous studies have established that psyllids (Hemiptera, Psylloidea) contain primary endosymbionts, designated as Carsonella ruddii, which cospeciate with the psyllid host. This association appears to be the consequence of a single infection of a psyllid ancestor with a bacterium. Some psyllids may have additional secondary (S-) endosymbionts. We have cloned and sequenced the 16S-23S ribosomal RNA genes of seven representative psyllid S-endosymbionts. Comparison of the S-endosymbiont phylogenetic trees with those of C. ruddii indicates a lack of congruence, a finding consistent with multiple infections of psyllids with different precursors of the S-endosymbionts and/or possible horizontal transmission. Additional comparisons indicate that the S-endosymbionts are related to members of the Enterobacteriaceae as well as to several other endosymbionts and insect-associated bacteria.
journal_name
Curr Microbioljournal_title
Current microbiologyauthors
Thao ML,Clark MA,Baumann L,Brennan EB,Moran NA,Baumann Pdoi
10.1007/s002840010138keywords:
subject
Has Abstractpub_date
2000-10-01 00:00:00pages
300-4issue
4eissn
0343-8651issn
1432-0991pii
10.1007/s002840010138journal_volume
41pub_type
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