Abstract
As an eco-friendly management method, biological control of postharvest diseases, utilizing antagonistic yeasts, is a research topic receiving considerable attention. Detailed knowledge on the biology of yeast antagonists is crucial when considering their potential application and development as biocontrol products. Changes in the growth form, such as single-cell to pseudohyphae, have been associated with the mode of action in postharvest biocontrol yeasts. In this study, the antagonistic yeast, Candida diversa, reversibly shifted from a single-cell morphology on yeast peptone dextrose (YPD) medium with 2 % agar to a pseudohyphal morphology on YPD with 0.3 % agar. The tolerance of the pseudohyphal form to heat and oxidative stresses, as well as the biocontrol efficacy against Botrytis cinerea on apple and kiwifruit stored at 25 and 4 °C, was significantly higher as compared to the single-cell form. This study provides new information on the ability of C. diversa to change its morphology and the impact of the morphology shift on stress tolerance and biocontrol performance.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Nos. 31401794, 31101480 and 31171893), Provincial Natural Science Research Project of Anhui Colleges (No. KJ2014ZD25), a China Postdoctoral Science Foundation Funded Project (No. 2015 M570534), Public Service Platform in Anhui Wanjiang Institute of Poultry Technology (No. 1401032006), and the Project Sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry to Yuan Sui.
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Responsible editor: Philippe Garrigues
Guangkun Li, Mengshan Chi, Huizhen Chen and Yuan Sui contributed equally to this work.
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Li, G., Chi, M., Chen, H. et al. Stress tolerance and biocontrol performance of the yeast antagonist, Candida diversa, change with morphology transition. Environ Sci Pollut Res 23, 2962–2967 (2016). https://doi.org/10.1007/s11356-015-5769-8
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DOI: https://doi.org/10.1007/s11356-015-5769-8