Multiple Phytophthora species associated with a single riparian ecosystem in South Africa
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Date
Authors
Nagel, Jan Hendrik
Slippers, Bernard
Wingfield, Michael J.
Gryzenhout, Marieka
Journal Title
Journal ISSN
Volume Title
Publisher
Mycological Society of America
Abstract
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 Clade 6 were the most abundant,
including P. chlamydospora and P. lacustris. Species
residing in Clade 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.
Description
Keywords
Clade 6, Phytophthora chlamydospora, P. Citrophthora, P. Lacustris, P. Multivora, P. Plurivora, P. Taxon Sisulu-river, South Africa (SA)
Sustainable Development Goals
Citation
Nagel, JH, Slippers, B, Wingfield, MJ & Gryzenhout, M 2015, 'Multiple Phytophthora species associated with a single riparian ecosystem in South Africa', Mycologia, vol. 107, no. 5, pp. 915-925.