Screening, Identification and Antagonistic Effect of Streptomyces against Phytophthora sansomeana

doi:10.16409/j.cnki.2095-039x.2023.02.020

Abstract

Abstract: To provide effective biological control resources for the green control of P. sansomeana, Streptomyces strains were isolated and screened with antagonistic effects against P. sansomeana from rhizosphere soil of healthy atractylodes plants in the area of P. sansomeana in Anguo of Hebei province. As results, three antagonistic Streptomyces strains (BZX-104, BZX-23 and BZX-31) with good antagonistic effect against P. sansomeana were isolated and screened by dilution coating method and plate confrontation method. After 16S rDNA sequence analysis, combined with colony morphological characteristics, and physiological and biochemical characteristics, the three antagonistic strains were identified as S. alfalfae, S. galilaeus and S. bobili, respectively. Their inhibitory activity against P. sansomeana were more than 60%.

Key words: P. sansomeana, antagonistic Streptomycetes, 16S rDNA sequence analysis, bacteriostatic effect

CLC Number:

S476

LI Wenqiao, WANG Jiao, LIU Xiaoning, LI Yaning, HE Yunzhuan, LIU Daqun. Screening, Identification and Antagonistic Effect of Streptomyces against Phytophthora sansomeana[J]. Chinese Journal of Biological Control, 2023, 39(3): 636-645.

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