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中国生物防治学报 ›› 2017, Vol. 33 ›› Issue (5): 675-680.DOI: 10.16409/j.cnki.2095-039x.2017.05.014

• 研究论文 • 上一篇    下一篇

土壤因子对海洋多粘类芽胞杆菌L1-9在黄瓜根表土壤定殖的影响

王淑芳, 汪晶晶, 曹雪梅, 李欢, 王琦, 王军强, 马桂珍, 暴增海   

  1. 淮海工学院海洋生命与水产学院/江苏省海洋生物技术重点实验室, 连云港 222005
  • 收稿日期:2017-01-03 出版日期:2017-10-08 发布日期:2017-10-11
  • 通讯作者: 马桂珍
  • 作者简介:王淑芳,博士,E-mail:wangshufang2001@hotmail.com;马桂珍,教授,博士,E-mail:guizhenma@sohu.com。
  • 基金资助:
    江苏省自然科学基金(BK20141248);连云港市科技局现代农业项目(NYYQ1619,CN1514);淮海工学院青年基金项目(Z2014005)

Effects of Soil Factors on the Colonization of Marine Biocontrol Bacterium Paenibacillus polymyxa L1-9 in Cucumber Root Surface Soil

WANG Shufang, WANG Jingjing, CAO Xuemei, LI Huan, WANG Qi, WANG Junqiang, MA Guizhen, BAO Zenghai   

  1. Jiangsu Key Laboratory of Marine Biotechnology/College of Marine Life and Fisheries, Huaihai Institute of Technology, Lianyungang 222005, China
  • Received:2017-01-03 Online:2017-10-08 Published:2017-10-11

摘要: 本试验考察了土壤温度、有机质含量和pH对海洋生防细菌多粘类芽胞杆菌L1-9在黄瓜根表土壤中定殖的影响。采用实时荧光定量PCR方法检测了不同时期黄瓜根表土壤中菌株L1-9的16S rDNA拷贝数。结果表明,土壤有机质含量、土壤温度和pH对菌株L1-9在黄瓜根表的定殖有显著影响(P<0.01)。25℃定殖数量最高,为5.79×108拷贝/g土,是15℃时的3.4倍;添加有机肥20~40 g/kg土壤,可以促进菌株L1-9在黄瓜根际定殖;pH 7时,菌株L1-9在黄瓜根表土壤中的定殖数量最高。本研究为海洋生防菌L1-9防治黄瓜土传病害提供了理论依据。

关键词: 多粘类芽胞杆菌, 根表土壤, 定殖, 实时荧光定量PCR

Abstract: In this study, the effects of soil organic matter contents, temperature and soil pH value on colonization of marine biocontrol bacterium of L1-9 in root surface soil were investigated. 16S rDNA gene fragments of the strain in the root surface soil were quantified using quantitative real-time PCR method. The results showed that soil organic matter content, temperature and pH exhibited significant impacts on colonization of the strain L1-9 in root surface soil (P<0.01). The propagation of the strain L1-9 in root surface soil was faster under the temperature of 25℃, which was 5.79×108 copies per gram dry soil, and 4.3 times of that under 15℃. Addition of organic matter (20-40 g/kg) increased the population density of the strain L1-9. The maximum colonization level of the strain L1-9 in the root surface soil was achieved in pH 7. This study laid a foundation for the development and application of the marine biocontrol bacterium L1-9 against soilborne diseases of cucumber.

Key words: Paenibacillus polymyxa, root surface soil, colonization, quantitative real-time PCR

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