Yeast biocontrol of fungal spoilage of pears stored at low temperature

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dc.creator Robiglio, Andrea
dc.creator Sosa, María Cristina
dc.creator Lutz, María Cecilia
dc.creator Lopes, Christian A.
dc.creator Sangorrín, Marcela P. 2011 2019-12-19T15:48:25Z 2019-12-19T15:48:25Z
dc.identifier.issn 0168-1605 es_ES
dc.description.abstract To reduce the use of fungicides, biological control with yeasts has been proposed in postharvest pears. Most studies of antagonists selection have been carried out at room temperature. However, in regions like North Patagonia where fruits are stored at − 1/0 °C during 5–7 months the selection of potential antagonist agents must be carried out at low temperature. In this study, 75 yeast cultures were isolated from healthy pears from two Patagonian cold-storage packinghouses. Aureobasidium pullulans, Cryptococcus albidus, Cryptococcus difluens, Pichia membranifaciens, Pichia philogaea, Rhodotorula mucilaginosa and Saccharomyces cerevisiae yeast species were identified. Additionally, 13 indigenous isolates of Penicillium expansum and 10 isolates of Botrytis cinerea were obtained from diseased pears, characterized by aggressiveness and tested for sensitivity to postharvest fungicides. The yeasts were pre-selected for their ability to grow at low temperature. In a first biocontrol assay using the most aggressive and the most sensitive isolate of each pathogen, two epiphytic isolates of A. pullulans and R. mucilaginosa were the most promising isolates to be used as biocontrol agents. They reduced the decay incidence by P. expansum to 33% and the lesion diameter in 88% after 60 days of incubation in cold. Foreign commercial yeast used as a reference in assays, only reduced 30% of lesion diameter in the same conditions. Yeasts were not able to reduce the incidence of B. cinerea decay. The control activity of the best two yeasts was compared with the control caused by the fungicides in a second bioassay, obtaining higher levels of protection against P. expansum by the yeasts. These two regional yeasts isolates could be promising tools for the future development of commercial products for biological control. es_ES
dc.format application/pdf es_ES
dc.format.extent pp. 211–216 es_ES
dc.language eng es_ES
dc.publisher Elsevier es_ES
dc.publisher ScienceDirect es_ES
dc.relation.uri es_ES
dc.rights Atribución-NoComercial-CompartirIgual 2.5 Argentina es_ES
dc.rights.uri es_ES
dc.source International Journal of Food Microbiology 147 (2011) es_ES
dc.subject Postharvest diseases es_ES
dc.subject Penicillium expansum es_ES
dc.subject Botrytis cinerea es_ES
dc.subject Pyrus communisL. es_ES
dc.subject Antagonists yeast es_ES
dc.subject Biocontrol es_ES
dc.subject.other Ciencias Agrarias y Forestales es_ES
dc.title Yeast biocontrol of fungal spoilage of pears stored at low temperature es_ES
dc.type Articulo es
dc.type article eu
dc.type acceptedVersion eu
dc.description.fil Fil: Sosa, María Cristina. Universidad Nacional del Comahue. Facultad de Ciencias Agrarias; Argentina es_ES
dc.description.fil Fil: Lutz, María Cecilia. Universidad Nacional del Comahue. Facultad de Ciencias Agrarias; Argentina es_ES
dc.cole Artículos es_ES

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