Vesicular–arbuscular mycorrhizal fungi associated with native tall grass prairie and cultivated winter wheat

摘要: More vesicular–arbuscular mycorrhizal (VAM) fungal species and significantly more spores were recovered from undisturbed prairie soils than four winter wheat field in Kansas through the 1980–1981 growing season. Two previously undescribed sporocarpic of Endogonaceae found samples but have not been successfully established pot culture, leaving genus to which they belong unclear. Though variable, 11–50% VAM root colonization was evident all grass roots sampled throughout year. In contrast, no identifiable until May after flowering when 27% observed. During 1981–1982 season, two other fields with similar results. No occurred 8% evident. The possible influence such low levels occurring quite late season is discussed.