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Journal article
Sample volume affects the number of Phytophthora and Phytopythium species detected by soil baiting
European journal of plant pathology, Vol.166(3), pp.303-313
2023
Abstract
Phytophthora species are detected from environmental samples through DNA metabar-coding than are isolated by baiting. We investigated whether bulking soil samples and baiting similar to 300 g samples in standard 1 L tubs resulted in the isolation of fewer Phytophthora and Phytophythium species compared with using 15 - 20 g samples of non-bulked soil in individual 200 ml tubs. At each of four sites with dying vegetation, 50 soil samples were collected and baited separately in small tubs, followed by plating of lesioned baits over 7 days. The number of Phytophthora species obtained was compared with those obtained from bulking the 50 samples and baiting subsamples in large tubs. Half of the asymptomatic baits were plated on day 7 and the remaining were assessed for the presence of Phytophthora using metabarcoding. Root samples with rhizosphere soil from the bulked soil in each site were also assessed using metabarcoding. A higher number of Phytophthora species was recovered from each site from baiting small volumes of non-bulked soil than large volumes of bulked soils. Metabarcoding of the asymptomatic baits revealed species not isolated from lesioned baits. More species were detected from the roots using metabarcoding than were isolated from baits. Metabarcoding did not reveal any species from the rhizosphere soil and roots that were not also detected from metabarcoding of the asymptomatic baits and/or plating. The numbers of Phytopythium species detected using the different methods followed the same trend as for Phytophthora. It was concluded that baiting small samples from across a site in separate small tubs results in the isolation of a higher number of Phytophthora species than the standard technique of baiting large samples of bulked soils, and that this, together with metabarcoding of asymptomatic baits, detects the highest total number of species.
Details
- Title
- Sample volume affects the number of Phytophthora and Phytopythium species detected by soil baiting
- Authors/Creators
- Suchana R. Sarker - Murdoch UniversityJen McComb - Murdoch Univ, Harry Butler Inst, Ctr Climate Impacted Terr Ecosyst, Phytophthora Sci & Management, Perth, WA 6150, AustraliaGiles E. St. J. Hardy - Murdoch Univ, Harry Butler Inst, Ctr Climate Impacted Terr Ecosyst, Phytophthora Sci & Management, Perth, WA 6150, AustraliaTreena I. Burgess - Murdoch University, Harry Butler Institute
- Publication Details
- European journal of plant pathology, Vol.166(3), pp.303-313
- Publisher
- Springer Nature
- Number of pages
- 11
- Grant note
- Murdoch University, Australia CAUL
- Identifiers
- 991005591967007891
- Copyright
- © 2023 The Author(s)
- Murdoch Affiliation
- Centre for Terrestrial Ecosystem Science and Sustainability
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.97 Plant Pathology
- 3.97.1439 Phytophthora Management
- Web Of Science research areas
- Agronomy
- Horticulture
- Plant Sciences
- ESI research areas
- Plant & Animal Science