Salicylic acid enhances biocontrol efficacy of Rhodotorula glutinis against postharvest Rhizopus rot of strawberries and the possible mechanisms involved |
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Authors: | Hongyin Zhang Longchuan Ma Mark Turner Huaxi Xu Xiaodong Zheng Ying Dong Song Jiang |
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Affiliation: | 1. College of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, People’s Republic of China;2. School of Land, Crop and Food Sciences, The University of Queensland, Brisbane Qld 4072, Australia;3. College of Medical Science and Laboratory Medicine, Jiangsu University, Zhenjiang 212013, Jiangsu, People’s Republic of China;4. Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310029, Zhejiang, People’s Republic of China |
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Abstract: | The potential of using Rhodotorula glutinis alone or in combination with salicylic acid (SA) for the control of postharvest Rhizopus rot of strawberries, and their effects on enzyme activities of fruits were investigated. The combination of R. glutinis (1 × 108 CFU ml−1) with SA (100 μg ml−1) resulted in a significant reduction in the disease incidence and lesion diameter of Rhizopus rot on the strawberry fruits at 20 °C and 4 °C, and more so than with SA or yeast alone. SA at the concentration of 100–1000 μg ml−1 significantly inhibited spore germination of Rhizopus stolonifer. About 100 μg ml−1 of SA did not inhibit the growth of the antagonistic yeast, and could significantly increase the population growth of R. glutinis in strawberry wounds at 20 °C. SA, combined with R. glutinis, increased the activity of strawberry host defence enzymes (POD) and cell wall lytic enzymes (β-1,3-glucanase). |
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Keywords: | Strawberries Rhizopus rot Salicylic acid (SA) Rhodotorula glutinis Biocontrol Possible mechanisms |
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