Soil macroaggregates (>250 mm) are easily disrupted when wetted quickly, whereas microaggregates (50–250 mm) are highly stable. There is little knowledge of functional groups of bacteria from microaggregates that can stabilize soil and their diversity. We isolated the predominant bacteria from microaggregates collected from two agroecosystems: a site cropped to barley (40 years with tillage) an...

The non-target effect of the fungicide Quadris R on bacterial community from grassland loamy sand (LS) and cropland clay loam (CL) soils with unknown history usage was investigated. applied to soil mesocosms at 0.0 mg kg -1 (Az0), 2.90 (Az1), 14.65 (Az2) 35.0 (Az3) calculated towards active ingredient azoxystrobin (Az). Response communities investigated during a 120-day incubation experiment, e...

This study was conducted to elucidate microbiological characteristics of river water and groundwater communities in order to improve our conceptual and predictive understanding of river and groundwater ecosystem processes, functioning and management. Rouge River bacterial communities from shallow groundwater and river water were screened using Biolog Ecoplates, which test for oxidation of selec...

ABSTRACT Xanthomonas leaf blight has become an increasingly important disease of onion, but the diversity among Xanthomonas strains isolated from onion is unknown, as is their relationship to other species and pathovars of Xanthomonas. Forty-nine Xanthomonas strains isolated from onion over 27 years from 10 diverse geographic regions were characterized by pathogenicity to onion and dry bean, fa...

Loss of photosynthetic area can affect soil microbial communities by altering the availability of fixed carbon. We used denaturing gradient gel electrophoresis (DGGE) and Biolog filamentous-fungus plates to determine the effects of artificial defoliation of pines in a mixed pine-spruce forest on the composition of the fungal community in a forest soil. As measured by DGGE, two fungal species we...