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Seed priming with Pseudomonas putida isolated from rhizosphere triggers innate resistance against Fusarium wilt in tomato through pathogenesis-related protein activation and phenylpropanoid pathway

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Pedosphere 2020年第5期30卷 651-660页

作者： Nellickal Subramanyan JAYAMOHAN Savita Veeranagouda PATIL belur satyan kumudini Department of Biotechnology School of SciencesJAIN(Deemed-to-be University)Bengaluru 560011(India)

Pathogenesis-related(PR)proteins are one of the major and preliminary proteins accumulated as a defense against biotic *** defense response can be induced by using beneficial rhizobacteria,which has been studied in various host-pathogen *** the present study,eleven Pseudomonas isolates were assessed for their potential to ferment sorbitol,reduce nitrate,and produce mycolytic enzymes,1-aminocyclopropane-l-carboxylic acid(ACC)deaminase,phenazine antibiotics,and N-acyl homoserine lactones(AHLs).All isolates were tested against the host-specific pathogen Fusarium oxysporum MTCC1755 in tomato under greenhouse conditions,and shortlisted isolates were tested for their rhizosphere ***-vitro test results showed that the isolates were able to produce mycolytic enzymes,including protease,lipase,chitinase,cellulase,and amylase,and the antibiotic phenazine and were negative for *** the isolates except two were positive for ACC deaminase *** results showed that the isolates M80,M96,and T109 significantly reduced symptoms of Fusarium *** greenhouse tests under autoclaved and unautoclaved soil conditions showed that M80,M96,and T109 were excellent rhizosphere competitors and were identified as Pseudomonas *** brief,the defense-specific biochemical variations in the host could describe the improved defense against Fusarium wilt occurring in the primed *** three Pseudomonas strains could be used as potential biocontrol agents,along with their rhizosphere competence.

关键词： 1-aminocyclopropane-l-carboxylic acid(ACC)deaminase biocontrol agent disease incidence mycolytic enzymes host-specific pathogen rhizosphere competence

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