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ACTA HORTICULTURAE SINICA ›› 2017, Vol. 44 ›› Issue (4): 664-674.doi: 10.16420/j.issn.0513-353x.2016-0598

• ARTICLE • Previous Articles     Next Articles

Isolation and Identification of Streptomyces lunalinharesii and its Control Effect on the Banana Fusarium Wilt Disease

ZHOU Dengbo1,JING Tao2,*,QI Dengfeng1,FENG Renjun1,DUAN Yajie3,CHEN Yufeng1,WANG Fei1,ZHANG Xiyan1,and XIE Jianghui1,**   

  1. (1Institute of Tropical Bioscience and Biotechnology,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101,China;2Haikou Experimental Station,Chinese Academy of Tropical Agricultural Sciences,Haikou 570102,China;3South Subtropical Crops Research Institute,Chinese Academy of Tropical Agricultural Sciences,Zhanjiang,Guangdong 524091,China)
  • Online:2017-04-25 Published:2017-04-25

Abstract:

In order to obtain broad spectrum antagonistic strainswe isolated 25 Actinomycetes strains and 8 antagonist strains from healthy soil that had been cropping banana plants for a number of years in Hainan Province using Fusarium oxysporum f. sp. cubense Race 4 and 8 other pathogens as indicative strains. The antibacterial activity of the antagonistic bacteria was evaluated by plate confrontationcontaining medium and thin layer chromatography methods. One of the strainsdesignated B-03showed a strong and stable control effect against nine pathogens with the inhibition of mycelium growth of 48.34% to 85.43%,and the inhibition of spore germination rate of 38.43% to 80.14%. It also inhibits mycelium growth and spore germination of F. oxysporum Race 4 by 85.43% and 80.14%,respectively. Based on the morphological characteristics,cultural characteristics,physiological and biochemical characteristics,cell wall composition and 16S rDNA sequence analysisthe strain was identified as Streptomyces lunalinharesii. Pot experiment showed that the control effect of the strain fermentation broth on banana Fusarium wilt reached 72.72%. Taken together,our results suggest that the strain S. lunalinharesii could provide a new resource for biological control of banana Fusarium wilt disease.

Key words: banana, Streptomyces, banana Fusarium wilt disease, antagonistic bacterial, identification, application

CLC Number: