YEASTS AS ANTAGONISTS AGAINST ERWINIA AMYLOVORA
Abstract
Epiphytic yeasts are potential antagonists to fire blight in apple blossoms. They showed effects against Erwinia amylovora in field experiments and reduced symptoms on detached apple blossoms. In this study, strains of Aureobasidium pullulans and Metschnikowia pulcherrima were investigated using the immature pear fruit assay and agar diffusion assay. Population studies were performed during the flowering period to examine which parts of the blossom were colonized by the antagonists. Coculture experiments in liquid basal media with synthetic nectar resulted in suppression of E. amylovora by yeast strains. A drop of pH in the medium is partially responsible for the decrease of the E. amylovora population. The production of an antimicrobial compound might be involved. Field, greenhouse and laboratory experiments indicated that yeasts have antagonistic properties against fire blight. The mode of action could possibly be a combination of effects resulting in suppression of E. amylovora.
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In agriculture, yeasts have been identified as powerful antagonists of fungal pathogens causing postharvest and storage diseases and of microorganisms attacking flowers and leaves.
“In agriculture, yeasts have been identified as powerful antagonists of fungal pathogens causing postharvest and storage diseases and of microorganisms attacking flowers and leaves [25–31].”
From Competition assays and physiological experiments of soil and phyllosphere yeasts identify Candida subhashii as a novel antagonist of filamentous fungi (2017) · cites this paper as [25]
The basidiomycetous yeast A. pullulans is a cosmopolitan species that is used in biotechnology and acts as an antagonist against fungal and bacterial plant pathogens such as postharvest diseases or fire blight.
“The basidiomycetous yeast A. pullulans is a cosmopolitan species that is used in biotechnology and acts as an antagonist against fungal and bacterial plant pathogens such as postharvest diseases or fire blight [25, 89–95].”
From Competition assays and physiological experiments of soil and phyllosphere yeasts identify Candida subhashii as a novel antagonist of filamentous fungi (2017) · cites this paper as [25]
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Hilber-Bodmer, M., Schmid, M., Ahrens, C. H., & Freimoser, F. M. (2017) · BMC Microbiology · doi:10.1186/s12866-016-0908-z · Cited by 106 · see citing works
- Authors
- Seibold, A., Viehrig, M., & Jelkmann, W.
- ORCID
- Jelkmann, W.
- Venue
- Acta Horticulturae
- Published
- 2006-02
- Issue
- 704
- Pages
- 367-370
- ISSN
- 0567-7572 (ISSN-L)
- 2406-6168
- OpenAlex
- W2589355855
- Cited by
- 10
- References
- 0
- Citations by year
- 2026: 2 · 2023: 2 · 2021: 2 · 2019: 1 · 2017: 1 · 2015: 1
- FWCI
- 2.19
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- Acta Horticulturae (publishedVersion)
- OpenAgrar (submittedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Pathogenic Bacteria Studies
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant-Microbe Interactions and Immunity
- Life Sciences › Immunology and Microbiology › Microbiology › Yeasts and Rust Fungi Studies
- Keywords
- fire blight, Erwinia amylovora, antagonistic yeasts, Aureobasidium pullulans, Metschnikowia pulcherrima, apple blossom, biological control, antimicrobial agents, pH effect
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