Antifungal Activity of Paenibacillus polymyxa HK18-8 Against Pepper Anthracnose and Its Colonization Ability

doi:10.16420/j.issn.0513-353x.2018-0639

ACTA HORTICULTURAE SINICA ›› 2019, Vol. 46 ›› Issue (3): 499-507.doi: 10.16420/j.issn.0513-353x.2018-0639

• Research Papers • Previous Articles Next Articles

Antifungal Activity of Paenibacillus polymyxa HK18-8 Against Pepper Anthracnose and Its Colonization Ability

（1College of Plant Protection，Henan Agricultural University，Zhengzhou 450002，China；2College of Horticulture，Henan Agricultural University，Zhengzhou 450002，China）

Online:2019-03-25 Published:2019-03-25

Abstract

Abstract: A promising biocontrol agent HK18-8，a strain with strong effect on pepper anthracnose，was selected from the rhizosphere of healthy dyetree plant. Its antifungal effect and colonization ability were detected by in vitro experiments. The results showed that，HK18-8 was able to inhibit the mycelial growth and conidia germination of Colletotrichum acutatum significantly in the in vitro experiment. The inhibition zone of the mycelial growth reached to 10 mm，and the inhibition rate of conidia germination was 70.15%. HK18-8 performed the successful potential control against pepper anthracnose（the control efficiency was 88.58%），and the preventive effect was higher than its therapeutic effect. In addition，HK18-8 was readily able to colonize on fruit surface of pepper，persisting with a relative population density of more than 106 cfu ? g-1. Based on the morphological，physiological characteristics and 16S rRNA sequence analysis，the strain HK18-8 was identified as Paenibacillus polymyxa.

CLC Number:

S 641.3

Antifungal Activity of Paenibacillus polymyxa HK18-8 Against Pepper Anthracnose and Its Colonization Ability . Antifungal Activity of Paenibacillus polymyxa HK18-8 Against Pepper Anthracnose and Its Colonization Ability [J]. ACTA HORTICULTURAE SINICA, 2019, 46(3): 499-507.

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Antifungal Activity of Paenibacillus polymyxa HK18-8 Against Pepper Anthracnose and Its Colonization Ability

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