Abstract:
:Putative mechanisms of action associated with the biocontrol capacity of four yeast strains (Cryptoccocus albidus NPCC 1248, Pichia membranifaciens NPCC 1250, Cryptoccocus victoriae NPCC 1263 and NPCC 1259) against Penicillium expansum and Botrytis cinerea were studied by means of in vitro and in situ assays. C. albidus(YP), a commercial yeast was also evaluated for comparative purposes. The yeast strains exhibited a variety of different mechanisms including: wound colonization, germination inhibition, biofilm formation, secretion of killer toxins, competition for nutrient and secretion of hydrolytic enzymes (protease, chitinase and glucanase). The relationship between strains (and their associated antagonist mechanisms) and in situ antagonist activity was also evaluated. Results indicate that mechanisms such as production of hydrolytic enzymes, the ability for colonization of wounds, production of killer toxin and inhibition of germination are the most important for biocontrol activity. Our study indicate that multiple modes of action may explain why P. membranifaciens NPCC 1250 and C. victoriae NPCC 1263 provided excellent control of postharvest pears disease.
journal_name
Int J Food Microbioljournal_title
International journal of food microbiologyauthors
Lutz MC,Lopes CA,Rodriguez ME,Sosa MC,Sangorrín MPdoi
10.1016/j.ijfoodmicro.2013.04.005subject
Has Abstractpub_date
2013-06-17 00:00:00pages
166-72issue
2-3eissn
0168-1605issn
1879-3460pii
S0168-1605(13)00179-7journal_volume
164pub_type
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