Biology bacteriocyte-associated endosymbionts of plant sap-sucking insects.
- P. Baumann
- BiologyAnnual Review of Microbiology
- 9 September 2005
Psyllids, whiteflies, aphids, and mealybugs are members of the suborder Sternorrhyncha and share a common property, namely the utilization of plant sap as their food source, and the different properties of the genomes and fragments of the genome suggest that there are different constraints on the permissible evolutionary changes.
Taxonomy of Aerobic Marine Eubacteria
- L. Baumann, P. Baumann, M. Mandel, R. Allen
- BiologyJournal of Bacteriology
- 1 April 1972
Two hundred and eighteen strains of nonfermentative marine bacteria were submitted to an extensive morphological, physiological, and nutritional characterization, finding that the majority of these groups were separable by a large number of unrelated phenotypic traits.
Sequence evolution in bacterial endosymbionts having extreme base compositions.
- M. A. Clark, N. Moran, P. Baumann
- BiologyMolecular biology and evolution
- 1 November 1999
Phylogenetic reconstruction of amino acid replacements indicates that replacements yielding increased A + T predominated early in the evolution of Buchnera, with the trend slowing or stopping during the last 50 Myr, suggesting that base composition in BuchnerA has approached a limit enforced by selective constraint acting on protein function.
A molecular clock in endosymbiotic bacteria is calibrated using the insect hosts
- N. Moran, M. Munson, P. Baumann, H. Ishikawa
- BiologyProceedings of the Royal Society of London…
- 23 August 1993
Rates calibrated using dates inferred from fossil aphids imply that Asian and American species of the aphid tribe Melaphidina diverged by the early Eocene; this result confirms an earlier hypothesis based on biogeographic evidence.
Organization of the mitochondrial genomes of whiteflies, aphids, and psyllids (Hemiptera, Sternorrhyncha)
- M. Thao, L. Baumann, P. Baumann
- BiologyBMC Evolutionary Biology
- 3 August 2004
Two species of whiteflies, one psyllid and one aphid have mitochondrial genomes with a gene order very similar to that of the proposed insect ancestor, indicating a transposition in the ancestor of these clusters.
Genetics, physiology, and evolutionary relationships of the genus Buchnera: intracellular symbionts of aphids.
- P. Baumann, L. Baumann, C. Lai, D. Rouhbakhsh, N. Moran, M. A. Clark
- BiologyAnnual Review of Microbiology
- 1995
Genetic and physiological studies indicate that Buchnera can synthesize methionine, cysteine, and tryptophan and supply these amino acids to the aphid host and involve plasmid-amplification of the gene coding for anthranilate synthase, the first enzyme of the tryptophile biosynthetic pathway.
A Study of the Moraxella Group II. Oxidative-negative Species (Genus Acinetobacter)
- P. Baumann, M. Doudoroff, R. Stanier
- BiologyJournal of Bacteriology
- 1 May 1968
Neither the hydrolysis of gelatin nor acid production from aldose sugars was found to be a reliable index of strain affinities indicated by the phenotypic analysis, although both properties were of some use in distinguishing between the subgroups.
COSPECIATION BETWEEN BACTERIAL ENDOSYMBIONTS (BUCHNERA) AND A RECENT RADIATION OF APHIDS (UROLEUCON) AND PITFALLS OF TESTING FOR PHYLOGENETIC CONGRUENCE
- M. A. Clark, N. Moran, P. Baumann, J. Wernegreen
- BiologyEvolution; international journal of organic…
- 1 April 2000
Overall, analyses support the interpretation that symbionts and aphids have undergone strict cospeciation, with no horizontal transmission of symbiotic bacteria even among closely related, ecologically similar aphid hosts.
Bacillus sphaericus as a mosquito pathogen: properties of the organism and its toxins.
- P. Baumann, M. A. Clark, L. Baumann, A. Broadwell
- BiologyMicrobiological reviews
- 1 September 1991
Comparisons of larvae from species which differ in their susceptibility to the B. sphaericus toxin indicate that the probable difference resides in the nature of the target sites of the epithelial midgut cells and not in uptake or processing of the toxin.
Secondary (γ-Proteobacteria) Endosymbionts Infect the Primary (β-Proteobacteria) Endosymbionts of Mealybugs Multiple Times and Coevolve with Their Hosts
- M. Thao, P. Gullan, P. Baumann
- BiologyApplied and Environmental Microbiology
- 1 July 2002
The results of phylogenetic analyses of mitochondrial DNA fragments encoding cytochrome oxidase subunits I and II from four representative mealybugs species were in agreement with the results of 16S-23S rDNA analyses, suggesting that relationships among strains of “Candidatus T. princeps” are useful in inferring the phylogeny of their mealybug hosts.
...
...