Abstract
A radiotracer glucose mineralization assay was used with streptomycin and actidione to monitor the relative seasonal contributions of bacteria and fungi to mineralization processes in soils derived from the rhizosphere-rhizoplane zone of plants from a shortgrass prairie ecosystem. Bacteria played a major role in glucose mineralization in both the rhizosphere and rhizoplane. These results indicate that the bacteria may play a greater role in glucose mineralization processes in the rhizosphere and rhizoplane zones of a semiarid grassland than would be assumed, based on available biomass estimates. This technique appears to be valuable for determining bacterial versus fungal contributions to glucose mineralization in the rhizosphere and rhizoplane and may be useful for measuring the decomposition of other more complex substances in this zone of intense microbial activity.
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