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Effect of Cryptococcus laurentii and calcium chloride on control of Penicillium expansum and Botrytis cinerea infections in pear fruit
- Yu, Ting, Yu, Chen, Lu, Huangping, Zunun, Mahbuba, Chen, Fangxia, Zhou, Tao, Sheng, Kuang, Zheng, Xiaodong
- Biological control 2012 v.61 no.2 pp. 169-175
- Botrytis cinerea, Cryptococcus laurentii, Penicillium expansum, biological control, calcium chloride, pears, peroxidase, yeasts
- This study was conducted to evaluate the efficacy of the biocontrol yeast Cryptococcus laurentii and calcium chloride (CaClâ) in suppressing the blue and gray mold rots in pear fruit wounds and the possible mechanisms involved. The results from the presented investigation showed that combined treatment of pear fruit wounds with C. laurentii and CaClâ was a much better approach for inhibition of Penicillium expansum and Botrytis cinerea infections than C. laurentii or CaClâ alone. CaClâ neither affected the growth of C. laurentiiin vitro or in vivo, nor directly inhibited the mold rots in pear fruit. However, CaClâ was shown to elicit the fruit resistance to mold rots when the time interval between CaClâ-treatment and pathogen-inoculation was increased up to 24h, being associated with an activation of the peroxidase activity of pear fruit. Therefore, it could be proposed that the mechanism by which CaClâ reinforced the biocontrol efficacy of C. laurentii was mainly due to its ability to induce the fruit natural resistance.