期刊
BIOLOGICAL CONTROL
卷 95, 期 -, 页码 49-56出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.biocontrol.2016.01.001
关键词
Antioxidant system; Biocontrol yeast; Cross-protection; Decay control; Heat shock; Stress tolerance
资金
- National Natural Science Foundation of China [31501688, 31401794, 31461143008]
- China Postdoctoral Science Foundation [2015M570534]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
- Provincial Natural Science Research Project of Anhui Colleges [KJ2014ZD25]
- Qiushi Project of HFUT [JZ2015QSJH0217]
Biological control of postharvest diseases, utilizing wild species and strains of antagonistic yeasts, is an eco-friendly management approach that has received considerable attention over the past three decades. A few yeast-based biocontrol products are either in advanced stages of development or commercially available. Ecological fitness, stress tolerance and biocontrol performance are essential attributes for yeasts used as biocontrol agents. In the present study, a mild heat shock (HS, 40 degrees C for 30 min) pretreatment of the biocontrol yeast, Rhodotorula mucilaginosa, increased its tolerance to subsequent high temperature (48 degrees C), oxidative stress (70 mM H2O2), salt stress (3 M NaCl), and low pH (pH 4). Activation of the yeast antioxidant system by HS resulted in a lower accumulation of reactive oxygen species and less oxidative damage to proteins and lipids relative to control yeast cells when both were subjected to various abiotic stresses. Additionally, HS-treated yeast exhibited increased efficacy in controlling infection of apple fruit by Penicillium expansum, and a higher growth rate in apple wounds. These results suggest that stress adaptation is a viable approach for improving the efficacy of yeast biocontrol agents under the variable environmental conditions that exist in the postharvest environment of packing houses and storage facilities. (C) 2016 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据