Pseudomonads contribute to regulation of Pratylenchus penetrans (Nematoda) populations on apple.

08:00 EDT 23rd May 2018 | BioPortfolio

Summary of "Pseudomonads contribute to regulation of Pratylenchus penetrans (Nematoda) populations on apple."

Inoculation with antagonistic soil microorganisms has shown potential to suppress replant disease of apple in orchard soils. Pseudomonas spp. may have potential to reduce Pratylenchus penetrans populations on apple. Pseudomonas spp. were isolated from the rhizosphere of sweet cherry, screened for antagonistic characteristics, and two highly antagonistic Pseudomonas isolates, P10-32 and P10-42, were evaluated for growth promotion of apple seedlings, suppression of P. penetrans populations, and root colonization in soil from three orchards. During the isolate screening, P. fluorescens P10-32 reduced in vitro growth of fungal pathogens, had protease activity, capacity to produce pyrrolnitrin, suppressed P. penetrans populations, and increased plant biomass. P. fluorescens P10-42 reduced in vitro growth of fungal pathogens, had protease activity, suppressed P. penetrans populations, and increased plant biomass. In potted orchard soil, inoculating apple with P. fluorescens P10-32 suppressed P. penetrans populations in one of the three soils examined. Inoculation with P. fluorescens P10-42 improved plant growth in two of the soils, and suppressed P. penetrans abundance in one soil. In one of the soils, P. fluorescens P10-42 was detected on the roots 56 days post-inoculation. Overall, we conclude that Pseudomonas spp. play a role in suppressing P. penetrans on apple in orchard soil.


Journal Details

This article was published in the following journal.

Name: Canadian journal of microbiology
ISSN: 1480-3275


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