We present a phylogeny of the Neotropical genus Engystomops (= Physalaemus pustulosus species group) based on sequences of approximately 2.4 kb of mtDNA, (12S rRNA, valine-tRNA, and 16S rRNA) and propose a phylogenetic nomenclature. The phylogeny includes all described taxa and two unnamed species. All analyses indicate that Engystomops is monophyletic and contains two basal allopatric clades. ...

Abstract Faeces from cows with different milk yield and non-lactating were applied to soil investigate whether N 2 O efflux is related feeding-induced differences in faecal microbiome abundances of nitrification denitrification genes. Fungal 18S-rRNA gene abundance was the highest faeces group. The 18S-rRNA/ergosterol ratio showed a strong positive correlation 18S-rRNA/fungal glucosamine ratio....

In the present investigation, the abundance and molecular phylogeny of part of the culturable bacterial population involved in the dissolution of "miliolite", a bioclastic limestone, from Gopnath, India, was studied. Carbonate-dissolving bacteria were isolated, enumerated and screened for their ability to dissolve miliolite. Amplified ribosomal DNA restriction analysis (ARDRA) indicated 14 oper...

The systematic position of the New Zealand sentinel crab Macrophthalmus (Hemiplax) hirtipes (Jacquinot, in Hombron & Jacquinot, 1846) has been questioned because the zoeal morphology is incongruent with that of other species assigned to the genus. A molecular phylogeny based on the mitochondrial large subunit (16S) rRNA gene indicates M. hirtipes is distinct from other macrophthalmid species, a...

Recently, Cangelosi and Brabant used oligonucleotide probes targeting the precursor 16S rRNA of Escherichia coli to demonstrate that the levels of precursor rRNA were more sensitive to changes in growth phase than the levels of total rRNA (G. A. Cangelosi and W. H. Brabant, J. Bacteriol. 179:4457-4463, 1997). In order to measure changes in the levels of precursor rRNA in activated sludge system...

Due to the importance of heterotrophic bacteria in biogeochemical cycles and their influence on water quality, many studies have assessed the composition of the bacterial community. Most of these were made in temperate freshwaters. Eighteen heterotrophic bacteria communities distributed over time and space in the water column of Carioca Lake, not exposed to anthropogenic activities, were analyz...

Paralicella tenuipes Chevreux, 1908 and caperesca Shulenberger Barnard, 1976 are known as widely distributed deep-sea scavenging amphipods. Some recent studies based on genetic data indicated the presence of high intraspecific variation P. suggesting it is a species complex. Based published molecular from Pacific Indian oceans new material obtained North South Atlantic, we integrated knowledge ...

A molecular phylogeny for seven taxa of enteric bacteria (Citrobacter freundii, Enterobacter cloacae, Escherichia coli, Hafnia alvei, Klebsiella oxytoca, Klebsiella pneumoniae, and Serratia plymuthica) was made from multiple isolates per taxa taken from a collection of environmental enteric bacteria. Sequences from five housekeeping genes (gapA, groEL, gyrA, ompA, and pgi) and the 16S rRNA gene...