title: Pythium regulare sp. nov., isolated from the Canary Islands, its taxonomy, its region of rDNA, and comparison with related species.
abstract: Pythium regulare (CI-34) was isolated from some soil samples taken in the Canary Islands (Spain). This new species is very closely related to P. irregulare isolated from pea roots in The Netherlands by Buisman in 1927. The species of Pythium are members of the kingdom Chromista. Pythium regulare is characterized by its ornamented oogonia bearing blunt or digitate spines, and its non-sporulating type of sporangia or hyphal bodies, its aplerotic oospores, its monoclinous and diclinous antheridia that at times crowd around the oogonia. The taxonomic description of this oomycete, the PCR of the internal transcribed region (spacers ITS1, ITS2, and the gene 5.8 S) of its ribosomal nuclear DNA as well as the nucleotide sequences, and its comparison with related species are given here.
authors: Laboratoire des Sciences de la Vigne, Institut Jules Guyot, Université de Bourgogne, BP 27877, 21078 Dijon, France.
authors: Isaac
authors: I
authors: Masih
authors: Bernard
authors: B
authors: Paul
mesh_terms: D001483:Base Sequence; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000302:isolation & purification; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D011775:Pythium / Q000145:classification* / Q000166:cytology / Q000235:genetics / Q000302:isolation & purification*; D012340:RNA, Ribosomal, 5.8S / Q000235:genetics; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid; D012988:Soil Microbiology; D013030:Spain; D013170:Spores / Q000166:cytology
chemical_list: D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer; D012340:RNA, Ribosomal, 5.8S