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Title:   Author  item
                                            DAVELOS, A - UNIVERSITY OF MINNESOTAitem
                                            KINKEL, L - UNIVERSITY OF MINNESOTAitem
                                            Samac, Deborah

                                                         - *Debby*
  Submitted to: Phytopathology
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 8/25/2001
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary:
                                Technical Abstract: Antibiotic activities of indigenous microbes have been implicated in the development of disease suppressive soils and may play a role in pathogen inhibition in non-agricultural systems. However, little is known of the frequency, intensity, and diversity of antibiotic inhibition and resistance among indigenous microbes in prairie soil. The ability of Streptomyces  isolates from prairie soil to inhibit and resist 10 standard Streptomyces isolates from a disease suppressive soil was evaluated. Analysis of antibiotic inhibition and resistance for individual isolates among 3 locations and 4 depths within a 1 m X 1 m plot revealed wide variation in inhibition and resistance. Fewer than 10 percent of isolates could inhibit or resist all 10 standards. One third of isolates were unable to inhibit any of the standards while no isolate was susceptible to all of the standards. The frequency and intensity of inhibition of the standards by  indigenous Streptomyces isolates varied among locations and tended to increase with increasing depth. Resistance was highly variable among locations and depths, but no clear trends were evident.


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