ge15菌株的鉴定及其对人参病害的防治效果

Identification of bacterial strain ge15 and its controlling effect on ginseng diseases

根据以前的16S r DNA序列同源性分析结果,以及研究开展的生理生化指标测定及形态学观察结果,将从人参根中分离到细菌ge15菌株鉴定为嗜根寡养单胞菌Stenotrophomonas rhizophila。对峙培养发现,ge15菌株对人参黑斑病菌Alternaria panax、人参疫病菌Phytophthora cactorum和人参锈腐病菌Cylindrocapon destructans的抑菌效果明显,抑菌带宽分别为13.3,24.0,12.0 mm。试验结果表明,经ge15菌株处理的人参出苗率和存苗率与多菌灵相当,均显著高于对照。考虑到生防菌田间施用时无毒、无污染等优点,该菌株在人参病害防治过程中具有良好的应用潜力。

Based on previous results of 16S rDNA sequence homologuous and results of physic-biochemical indexes and morphological characteristics in the present work, bacterial strain ge15 isolated from roots of ginseng plants was identified as Stenotrophomonas rhizophila. Confronting incubation results showed that, strain ge15 inhibited the growth of Alternaria panax, Phytophthora cactorum, and Cylindrocapon destructans significantly, and the width of inhibition zone was 13.3, 24.0,12.0 mm, respectively. Further results showed that the emergence rate and seedling survive rate of ge15 treatment was significantly higher than those of the control, and which was similar to pesticide carbendazol treatment. The ge15 strain has good application potential in ginseng diseases control without contamination.