期刊
MYCOLOGIA
卷 107, 期 5, 页码 915-925出版社
TAYLOR & FRANCIS INC
DOI: 10.3852/13-380
关键词
Glade 6; Phytophthora chlamydospora; P. citrophthora; P. lacustris; P. multivora; P. plurivora; P. taxon Sisulu-river; South Africa
类别
资金
- National Research Foundation (NRF)
- Department of Science and Technology/National Research Foundation (DST/NRF) Centre of Excellence in Tree Health Biotechnology (CTHB)
- University of Pretoria, South Africa
The diversity of Phytophthora spp. in rivers and riparian ecosystems has received considerable international attention, although little such research has been conducted in South Africa. This study determined the diversity of Phytophthora spp. within a single river in Gauteng province of South Africa. Samples were collected over 1 y including biweekly river baiting with Rhododendron indicum leaves. Phytophthora isolates were identified with phylogenetic analyses of sequences for the internal transcribed spacer (ITS) region of the ribosomal DNA and the mitochondrial cytochrome oxidase c subunit I (coxI) gene. Eight Phytophthora spp. were identified, including a new taxon, P. taxon Sisulu-river, and two hybrid species from Cooke's ITS clade 6. Of these, species from Glade 6 were the most abundant, including P. chlamydospora and P. lacustris. Species residing in Glade 2 also were encountered, including P. multivora, P. plurivora and P. citrophthora. The detection of eight species in this investigation of Phytophthora diversity in a single riparian river ecosystem in northern South Africa adds to the known diversity of this genus in South Africa and globally.
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