title: Achlya abortispora, a new oomycete isolated from water samples taken from a water reservoir in Morocco.
abstract: Achlya abortispora sp. nov. was found in water and floating organic matter taken form a dam near Rabat, Morocco. The new species is described and compared with other species of the genus. Distinguishing characteristics of A. abortispora are the production of long fusiform sporangia with achlyoid and aplanoid discharge of zoospores; smooth-walled spherical to club-shaped oogonia, which are usually lateral, but at times intercalary, containing 1 to 20 oospheres. The oogonia can also bear 1 to 5 appendages, which may indicate oogonial proliferation. Most of the oospheres do not mature and are thus abortive. The antheridial branches supplying the oogonia are predominantly diclinous, but at times these may be monoclinous and androgynous. Antheridial branches coil and wrap around the oogonia. Morphologic features of the oomycete and the sequence of the ITS region of its rDNA, as well as their comparison with related species, are discussed. This is the first report of the occurrence of a saprolegniaceous oomycete from Morocco.
authors.affiliation: Laboratoire de Botanique, Département de Biologie, Faculté des Sciences, Université Mohammed V, Rabat, BP , Maroc.
authors.forename: El Androusse
authors.initials: el A
authors.lastname: Amal
authors.forename: El Aissami
authors.initials: el A
authors.lastname: Aïcha
authors.forename: Paul
authors.initials: P
authors.lastname: Bernard
mesh_terms: D044743:Achlya / Q000235:genetics* / Q000302:isolation & purification / Q000502:physiology; D001483:Base Sequence; D048028:DNA, Algal / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics*; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D005618:Fresh Water; D008969:Molecular Sequence Data; D009018:Morocco; D009868:Oomycetes / Q000145:classification / Q000235:genetics / Q000302:isolation & purification; D016133:Polymerase Chain Reaction; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D012339:RNA, Ribosomal, 28S / Q000235:genetics; D012340:RNA, Ribosomal, 5.8S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid; D013170:Spores / Q000502:physiology; D014871:Water Microbiology
chemical_list: D048028:DNA, Algal; D004275:DNA, Ribosomal; D021903:DNA, Ribosomal Spacer; D012337:RNA, Ribosomal, 18S; D012339:RNA, Ribosomal, 28S; D012340:RNA, Ribosomal, 5.8S