title: Pythium contiguanum nomen novum (syn. Pythium dreschleri Paul), its antagonism to Botrytis cinerea, ITS1 region of its nuclear ribosomal DNA, and its comparison with related species.
abstract: Pythium drechsleri Paul was described as a new species from soil samples taken in a salt-marsh of Arzew, Algeria [Paul, B. (1988) Une nouvelle espèce de Pythium isolée d'une saline de l'ouest Algérien. Cryptogam. Mycol. 9, 325-333]. The name of the fungus, P. drechsleri, is a nomen invalidum, as it is a later homonym of P. drechsleri Rajgopalan and Ramakrishnan [Rajagopalan, S. and Ramakrishnan, K. (1971) Phycomycetes in agricultural soils with special reference to the Pythiaceae. Madras Univ. J. Sect. B 37,38, 100-117]. A new name, Pythium contiguanum is now being given to P. drechsleri Paul. This species is characterised by its contiguous inflated type of sporangia, smooth-walled oogonia and mostly monoclinous antheridia. Although the fungus is not known to be a pathogen, it has a very well developed appressorial system comprised of both sickle shaped and coiled appressoria. Morphological features, its antagonism towards the grape-vine pathogen Botrytis cinerea, together with the sequences of the ITS1 region of its nuclear ribosomal DNA and its comparison with related species are given here.
authors.affiliation: Laboratoire des sciences de la Vigne, Institut Jules Guyot, Université de Bourgogne, P.O. Box 138, 21004, Dijon, France. bernard.paul@u-bourgogne.fr
authors.forename: B
authors.initials: B
authors.lastname: Paul
mesh_terms: D000898:Antibiosis; D001483:Base Sequence; D020171:Botrytis / Q000235:genetics / Q000254:growth & development*; D004275:DNA, Ribosomal / Q000235:genetics; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000379:methods; D011775:Pythium / Q000145:classification / Q000166:cytology / Q000235:genetics / Q000502:physiology; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D012340:RNA, Ribosomal, 5.8S / Q000235:genetics; D012988:Soil Microbiology; D009626:Terminology as Topic
chemical_list: D004275:DNA, Ribosomal; D012337:RNA, Ribosomal, 18S; D012340:RNA, Ribosomal, 5.8S