Sun Pingping, Zhao Xinbei, Shangguan Nini, Chang Dongwei, Ma Qing
State Key Laboratory of Crop Stress Biology for Arid Areas, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China.
Can J Microbiol. 2015 Apr;61(4):257-62. doi: 10.1139/cjm-2014-0655. Epub 2015 Jan 12.
Despite the application of multiple strains in the biocontrol of plant diseases, multistrain inoculation is still constrained by its inconsistency in the field. Nutrients, especially carbons, play an important role in the biocontrol processes. However, little work has been done on the systematic estimation of inoculants' carbon source use on biocontrol efficacies in vivo. In the present study, 7 nonpathogenic Streptomyces strains alone and in different combinations were inoculated as biocontrol agents against the potato scab disease, under field conditions and greenhouse treatments. The influence of the inoculants' carbon source use properties on biocontrol efficacies was investigated. The results showed that increasing the number of inoculated strains did not necessarily result in greater biocontrol efficacy in vivo. However, single strains with higher growth rates or multiple strains with less carbon source competition had positive effects on the biocontrol efficacies. These findings may shed light on optimizing the consistent biocontrol of plant disease with the consideration of inoculants' carbon source use properties.
尽管多种菌株已应用于植物病害的生物防治，但多菌株接种在田间的效果仍存在不一致性，受到一定限制。营养物质，尤其是碳源，在生物防治过程中起着重要作用。然而，关于在体内系统评估接种剂碳源利用对生物防治效果的研究却很少。在本研究中，将7种非致病性链霉菌菌株单独及以不同组合作为生物防治剂，在田间条件和温室处理下接种以防治马铃薯疮痂病。研究了接种剂碳源利用特性对生物防治效果的影响。结果表明，增加接种菌株数量不一定会在体内产生更高的生物防治效果。然而，生长速率较高的单一菌株或碳源竞争较少的多种菌株对生物防治效果有积极影响。这些发现可能有助于在考虑接种剂碳源利用特性的情况下，优化植物病害的稳定生物防治。
