Journal article
Selection for decreased sensitivity to phosphite in Phytophthora cinnamomi with prolonged use of fungicide
Plant Pathology, Vol.57(5), pp.928-936
2008
Abstract
To test the hypothesis that resistance in Phytophthora cinnamomi to control by the fungicide phosphite (phosphonate) would arise in sites with prolonged use of phosphite, 30 P. cinnamomi isolates were collected from a range of sites with different phosphite-use histories, including phosphite-treated and untreated avocado orchards, and phosphite-treated and untreated native vegetation sites. The colonizing ability of these isolates was tested by different inoculation methods against a range of host tissues, treated and untreated with phosphite, including mycelial stem inoculation on clonally propagated Leucadendron sp., mycelial root inoculation of lupin seedlings and zoospore inoculation of Eucalyptus sieberi cotyledons. Isolates from avocado orchards with a long history of phosphite use were, on average, more extensive colonizers of the phosphite-treated Leucadendron sp., lupin seedling roots and Eucalyptus sieberi cotyledons. These isolates did not colonize untreated plant tissue (Leucadendron sp.) more extensively than isolates from sites with no history of phosphite use and no isolates were resistant to control by phosphite. Analysis of all isolates with microsatellite markers revealed the majority were from a single clonal lineage. Selection for decreased sensitivity to phosphite in planta has taken place within asexual clonal lineages of P. cinnamomi in sites with prolonged use of phosphite.
Details
- Title
- Selection for decreased sensitivity to phosphite in Phytophthora cinnamomi with prolonged use of fungicide
- Authors/Creators
- M.P. Dobrowolski (Author/Creator) - Murdoch UniversityB.L. Shearer (Author/Creator) - Department of Environment and ConservationI.J. Colquhoun (Author/Creator) - Alcoa (Australia)P.A. O’Brien (Author/Creator) - Murdoch UniversityG.E.St.J. Hardy (Author/Creator) - Murdoch University
- Publication Details
- Plant Pathology, Vol.57(5), pp.928-936
- Publisher
- Wiley-Blackwell
- Identifiers
- 991005542889407891
- Copyright
- © 2008 The Authors.
- Murdoch Affiliation
- School of Biological Sciences and Biotechnology; Centre for Phytophthora Science and Management
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.97 Plant Pathology
- 3.97.1439 Phytophthora Management
- Web Of Science research areas
- Agronomy
- Plant Sciences
- ESI research areas
- Plant & Animal Science