caa a22 4500 475746848 CHVBK 20180406123515.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1007/s002840010138 doi (NATIONALLICENCE)springer-10.1007/s002840010138 Secondary Endosymbionts of Psyllids Have Been Acquired Multiple Times [Elektronische Daten] [MyLo L. Thao, Marta A. Clark, Linda Baumann, Eric B. Brennan, Nancy A. Moran, Paul Baumann] 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. Springer-Verlag New York Inc., 2000 Thao MyLo L. Microbiology Section, University of California, Davis, CA 95616-8665, USA, US aut Clark Marta A. Microbiology Section, University of California, Davis, CA 95616-8665, USA, US aut Baumann Linda Microbiology Section, University of California, Davis, CA 95616-8665, USA, US aut Brennan Eric B. Plant Biology Section, University of California, Davis, CA 95616-8536, USA, US aut Moran Nancy A. Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA, US aut Baumann Paul Microbiology Section, University of California, Davis, CA 95616-8665, USA, US aut https://doi.org/10.1007/s002840010138 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s002840010138 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Thao MyLo L. Microbiology Section, University of California, Davis, CA 95616-8665, USA, US aut NATIONALLICENCE 700 1- Clark Marta A. Microbiology Section, University of California, Davis, CA 95616-8665, USA, US aut NATIONALLICENCE 700 1- Baumann Linda Microbiology Section, University of California, Davis, CA 95616-8665, USA, US aut NATIONALLICENCE 700 1- Brennan Eric B. Plant Biology Section, University of California, Davis, CA 95616-8536, USA, US aut NATIONALLICENCE 700 1- Moran Nancy A. Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, USA, US aut NATIONALLICENCE 700 1- Baumann Paul Microbiology Section, University of California, Davis, CA 95616-8665, USA, US aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer