Salicylic acid enhances biocontrol efficacy of Rhodotorula glutinis against postharvest Rhizopus rot of strawberries and the possible mechanisms involved
Hongyin Zhang, Longchuan Ma, Mark Turner, Huaxi Xu, Xiaodong Zheng, Ying Dong and Song Jiang
Food Chemistry, Volume 122, Issue 3, 1 October 2010, Pages 577-583
2010
บทคัดย่อ
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-1significantly inhibited spore germination of Rhizopus stolonifer. About 100 μg ml-1of 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).