Social & Scientific Systems, Inc., Durham, NC 27713, USA Integrated Laboratory Systems, Inc., Research Triangle Park, NC 27709, USA National Toxicology Program Interagency Center for the Evaluation of Alternative Toxicological Methods, Division of the National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA Procter & Gamble NV, Stro...

Abstract Phylogenetic analyses of sequences the nuc rDNA small subunit (18S), internal transcribed spacer (ITS1-5.8S-ITS2 = ITS), and large (28S) region (= 18S-ITS-28S), as well this concatenated with largest RNA polymerase II ( RPB1 ) gene, proved that species originally described Acaulospora polonica (phylum Glomeromycota represents a new genus family ancient order Archaeosporales, here intro...

Nuclear DNA sequence data are essential for obtaining a complete understanding of plant species relationships, yet these data have been conspicuously absent from phylogenetic analyses of Lemnaceae (duckweeds). Using a modified Sanger sequencing protocol, we obtained DNA sequences of duckweed nuclear ribosomal regions, including 18S and 26S rDNA genes, the external transcribed spacer (ETS) and t...