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Biocontrol activity of antagonistic yeasts against Penicillium expansum on apple

Scherm, Barbara and Ortu, Giuseppe and Muzzu, Andrea and Budroni, Marilena and Arras, Giovanni and Migheli, Quirico (2003) Biocontrol activity of antagonistic yeasts against Penicillium expansum on apple. Journal of Plant Pathology, Vol. 85 (3), p. 205-213. ISSN 1125-4653. Article.

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Penicillium expansum causes severe rots on apple fruit during storage and shelf life. Aiming at the development of new antagonistic yeast active in controlling postharvest pathogens of fruit, several isolates were obtained from fig (Ficus carica) and cactus pear (Opuntia ficus-indica) grown in untreated orchards in Northern Sardinia (Italy). Two yeast strains of Candida guillermondii were selected for their remarkable antagonistic properties against P. expansum on apple. A film-forming strain of Saccharomyces cerevisiae isolated from wine was also included in the experiments. In trials carried out on the cv. Golden Delicious and Fuji, the yeasts applied alone or in the presence of various additives reduced apple rot with up to 100% efficacy. Killed yeast cells and culture filtrates had no biocontrol activity. Addition of different sugars in the apple wound had no detrimental effect on the biocontrol potential of the tested yeasts. Conversely, several nitrates significantly inhibited the antagonistic capability of C. guillermondii, thus suggesting that competition for nitrogen should play a major role in the biocontrol activity of the antagonistic yeast.

Item Type:Article
ID Code:5313
Uncontrolled Keywords:Postharvest diseases, Penicillium expansum, blue mould, Candida guillermondii, Saccharomyces cerevisiae, Sardinia
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/16 Microbiologia agraria
Area 07 - Scienze agrarie e veterinarie > AGR/12 Patologia vegetale
Divisions:001 Università di Sassari > 01 Dipartimenti > Protezione delle piante
002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche > Istituto di scienze delle produzioni alimentari, Sassari
001 Università di Sassari > 01 Dipartimenti > Scienze ambientali agrarie e biotecnologie agro-alimentari
Publisher:Edizioni ETS
Deposited On:17 Jan 2011 13:36

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