This study focuses on the weaver ant, Camponotus textor, Forel which occurs in some areas of the Brazilian Cerrado and Atlantic Forest, and its symbionts: Blochmannia, an obligate symbiont of Camponotus, and Wolbachia, known for causing reproductive alterations in their hosts. The main goal of this study was to investigate the presence, frequency of occurrence, and diversity of Wolbachia and Blochmannia strains in C. textor colonies. We found high infection rates (100%) and the occurrence of at least two distinct strains of Blochmannia (H_1 or H_7) in the same species. The observed haplotype variation within a single species may result from the high mutation rate of the symbiont. Similarly, the Wolbachia was found in all colonies with different rates of infections and a new strain (supergroup A) was deposited in the MLST database. The diversity found in the present study shows that there is still much to explore to understand about these symbiotic interactions.
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Proteomic characterization of the fibroin-based silk fibers produced by weaver ant Camponotus textor.
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Department of General and Applied Biology, Institute of Biosciences of Rio Claro, University of Sao Paulo State (UNESP), Rio Claro, São Paulo, Brazil. Electronic address:
The fibroin-based silk fibers of weaver ants are an alternative biomaterial to be investigated and explored for potential biomedical applications. In this context, the silk fibers from the nest of the weaver ant Camponotus textor was solubilized and fractionated by gel permeation. The different fractions were collected, pooled and submitted to analysis with a series of biochemical methods, nuclear magnetic resonance (NMR) spectroscopy, analytical proteomic strategies, and data treatment with bioinformatic tools to perform the structural characterization of the fibroin-based silk fibers produced by the ant.
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Departament of Biology e Center for Studies on Social Insects, Biosciense Institute, São Paulo State University (UNESP), Campus Rio Claro, Avenida 24A, 1515, Bela Vista, Rio Claro, SP, 13506-900, Brazil.
Camponotus is a hyper-diverse ant genus that is associated with the obligate endosymbiont Blochmannia, and often also with Wolbachia, but morphological studies on the location of these bacteria in the queen's ovaries during oogenesis remain limited. In the present study, we used the Neotropical weaver ant Camponotus textor to characterize the ovary using histology (HE) techniques, and to document the location of Blochmannia and Wolbachia during oogenesis through fluorescence in situ hybridization (FISH). This is the first morphological report of these two bacteria in the same host with polytrophic meroistic ovaries and reveals that Blochmannia is found inside late-stage oocytes and Wolbachia is associated with the nuclei of the nurse cells.
View Article and Find Full Text PDFWeaving through a cryptic species: Comparing the Neotropical ants Camponotus senex and Camponotus textor (Hymenoptera: Formicidae).
Micron
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Biodiversity Collections, Department of Biological Sciences, The University of Texas, El Paso, TX 79968, USA.
Camponotus senex (Fr. Smith 1858) and Camponotus textor Forel, 1899 are commonly confused species in the New World tropics. We provide morphological characteristics based on the larvae and adults, behavioural differences, together with evidence from molecular markers (cuticular hydrocarbon profiles, venom differences, nuclear ribosomal ITS-1, and mtDNA COI sequence comparisons) to separate the two species, demonstrating they are not immediately closely related.
View Article and Find Full Text PDFIntracellular Symbiotic Bacteria of Camponotus textor, Forel (Hymenoptera, Formicidae).
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Universidade Estadual Paulista "Júlio de Mesquita Filho" UNESP - Campus Rio Claro, Biologia, CEIS, Av. 24A, 1515, Bela Vista, Rio Claro, SP, 13506-900, Brazil.
This study focuses on the weaver ant, Camponotus textor, Forel which occurs in some areas of the Brazilian Cerrado and Atlantic Forest, and its symbionts: Blochmannia, an obligate symbiont of Camponotus, and Wolbachia, known for causing reproductive alterations in their hosts. The main goal of this study was to investigate the presence, frequency of occurrence, and diversity of Wolbachia and Blochmannia strains in C. textor colonies.
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Biologia, CEIS, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Campus Rio Claro, Av. 24A, 1515, Bela Vista, Rio Claro, SP, 13506-900, Brazil.
The great diversity of Camponotus, high levels of geographic, intraspecific and morphological variation common to most species of this genus make the determination of the interspecific limits of Camponotus a complex task. The Cytochrome c oxidase 1 (COI) gene was sequenced in this study to serve as an auxiliary tool in the identification of two taxa of Camponotus thought to be morphologically similar. Additionally, characteristics related to nesting were described.
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