Open AccessPythium 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
Author(s) -
Paul Bernard
Publication year - 2000
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.2000.tb08941.x
Subject(s) - pythium , biology , sporangium , ribosomal dna , botrytis cinerea , botany , antagonism , microbiology and biotechnology , genetics , spore , phylogenetics , gene , receptor
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.