Modification of seed exudates by seed-colonizing microbes from vermicompost alters pre-infection behavior of Pythium aphanidermatum zoospores – 2008
Allison L. H. Jack, Eric B. Nelson graduate student and professor respectively, Cornell University Department of Plant Pathology and Plant Microbe Biology, Ithaca, NY 14853
Abstract: Suppression of plant diseases with composts is well documented, but the microbial mechanisms involved are poorly understood. For diseases caused by Pythium spp., the spermosphere is a critical habitat for microbial interaction and host infection, leading us to hypothesize that seed colonizing microbes from composts may have important impacts on compost-mediated disease suppression. To test this hypothesis, we established the suppressiveness of vermicomposted dairy manure (VC) in cucumber bioassays with Pythium aphanidermatum zoospore inoculum. Seed and seedling health were significantly improved with VC amendments…
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