Wednesday, 9 November 2005
22
Monitoring Changes in Microbial Community Composition in the Rhizosphere of Five Apple Rootstock Cultivars in an Ard Infested Soil.
Angelika Rumberger, Department for Crop and Soil Science, Cornell University, 722 Bradfield Hall, Ithaca, NY 14853, Ian Merwin, Department for Horticulture, 120 Plant Science Building, Cornell University, Ithaca, NY 14853, and Janice Thies, Cornell University, 706 Bradfield Hall, Ithaca, NY 14853.
An apple replant disease (ARD) infested orchard site was replanted with five different apple rootstocks: the widely used Malling series, M.7 and M.26, and three breeds from the Cornell-Geneva series G.16, G.30 and CG.6210. The development of microbial rhizosphere community composition has been monitored for over 2 years. The bacterial rhizosphere community composition as assessed with PCR-DGGE did not differ between the rootstocks. However, plate counts for bacteria and fungi for the rootstocks M.7 and M.26 were higher than for the CG-rootstocks. The community composition changed in response to orchard planting position and within and between seasons.
Handout (.pdf format, 23444.0 kb)
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