Effects of yeast antagonist in combination with UV-C treatment on postharvest diseases of pear fruit |
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Authors: | Lingfei Xu Yanmin Du |
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Institution: | (1) College of Horticulture, Northwest A & F University, Yangling, Shaanxi, 712100, China;(2) Key Laboratory of Horticultural Plant Germplasm Resource Utilization in Northwest China, Yangling, Shaanxi, 712100, China |
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Abstract: | The yeast antagonist Candida guilliermondii and ultraviolet-C (UV-C) treatment were investigated for controlling infection following artificial inoculation with Penicillium expansum or Botrytis cinerea, or natural infection in pear fruit stored at 20°C. Applied separately, both C. guilliermondii and UV-C (5 kJ m−2) effectively inhibited decay caused by P. expansum or B. cinerea, and natural infection. The combination of C. guilliermondii and UV-C showed better control efficacy. Application of UV-C did not affect the growth of C. guilliermondii in pear fruit wounds, while UV-C induced a significant increase in the activities of chitinase, β-1,3-glucanase, catalase
and peroxidase in pear fruit. The mechanism by which UV-C enhanced the biocontrol efficacy of C. guilliermondii may be related to the elicitation of defense responses in pear fruit. The combination of C. guilliermondii and UV-C radiation could be a promising method for the control of P. expansum and B. cinerea in pear fruit. |
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