Physiological and Antagonistic Properties ofPichia kluyverifor Curative and Preventive Treatments Against Post-Harvest Fruit Fungi

Polish Journal of Food and Nutrition Sciences

卷:71

Karabo Seteno Obed Ntwampe¹  Vincent Ifeanyi Okudoh¹  Ucrecia Faith Hutchinson²  Chidi Silas Boredi²  Maxwell Mewa Ngongang²  Heinrich Wilbur Du Plessis²  Neil Paul Jolly² 

[1] Bioresource Engineering Research Group (BioERG), Department of Biotechnology, Cape Peninsula University of Technology, South Africa;

[2] Post-Harvest and Agro-Processing Technologies, ARC Infruitec-Nietvoorbij (The Fruit, Vine and Wine Institute), Agricultural Research Council, South Africa;

关键词: biocontrol;    botrytis cinerea;    monilinia laxa;    spoilage;    antagonistic yeast;   

DOI  :  10.31883/pjfns/139278

来源: DOAJ

【 摘 要 】

Postharvest fruit loss due to spoilage is mainly attributed to fungal infections. Synthetic chemicals can be used to preserve fruits, but they are expensive and pose risks to human health. The replacement of these chemicals by safer and cost- effective biocontrol agents is now a priority. This study investigated the physiological characteristics ofPichia kluyveriand its potential use as a biofungicide. The antagonistic effect ofP. kluyveriagainstBotrytis cinereaandMonilinia laxawas tested on yeast peptone dextrose agar, grapes, apples, and pears. Yeast growth was variably possible at different temperatures, pH, and salinity levels. Strain-dependent antagonistic responses were observed on agar plates, where M. laxa was the more sensitive fungus to the antagonistic yeast.P. kluyveridemonstrated strong physiological properties under stressful temperature, pH, and salinity conditions. Preventive applications ofP. kluyverito apples were 95% effective againstB. cinereaand 100% effective againstM. laxa . Fruit type-dependent responses were evident on pears. Similarly, preventive application on grapes was also effective against the fungal pathogens studied. In general, the antagonistic responses were both fungus- and treatment- (curative and preventive) dependent. Therefore, the preventive use ofP. kluyveriagainst post-harvest fruit-fungal infections proved to be an effective method for biological control of grapes, apples, and pears against fungal spoilage organismsBotrytis cinereaandMonilinia laxa .

【 授权许可】

Unknown