Identification and Characterization of A Biocontrol Bacterial Strain Against Melon Postharvest Diseases

doi:10.7668/hbnxb.2008.03.044

Abstract

Abstract: Melon postharvest diseases cause severe economic losses during transportation,storage and on market.Application of antagonistic microbes was accepted currently as an important measure to protect melon against postharvest diseases.In our study,numerous antagonistic strains were isolated from the surface of melon fruits using a bio-assay method.One of them,strain 2-17,which showed the highest biological control activity was screened out and identified as a member in the genus of Pseudomonas by analyzing its 16S rDNA sequence.Further detection of physiological and biochemical characteristics revealed that this strain belonged to P.putida biovar A.Strain 2-17 significantly inhibited the myceliual growth of 3 pathogenic fungi in a dual culture test.In vivo test on fruits suggested that 2-17 could suppress the 3 melon fruit diseases in high efficiencies,with 87.5% on pink mould rot caused by Trichothecium roseum,70.8% on black spot caused by Alternaira alternate and 78.6% on a rot disease caused by Fusarium spp.

Key words: Melon, Post harvest diseases, Pseudomonas, Identification, Microbial contro

CLC Number:

S566.3

LIU Xin-hai, WANG Qi, ZHOU Hong-you. Identification and Characterization of A Biocontrol Bacterial Strain Against Melon Postharvest Diseases[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(3): 185-189. doi: 10.7668/hbnxb.2008.03.044.

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