Potential growth stimulation of two hosts by acid-tolerantAcaulospora laevis was tested in a soil adjusted to 5 pH levels from 5.0 to 7.7. By wet-sieving methods, the field-source inoculum was essentially a pure culture ofA. laevis spores. Upon harvest of sweetgum a completely different spore-type was found in large quantities;A. laevis spores were relatively few to non-existent. The results dramatically underscore the need for caution against relying solely on pre-trial identifications of inoculum spores or presuming that apparently single-species cultures/inoculum will remain pure throughout an experiment.
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Davis, E.A., Young, J.L. & Rose, S.L. Unexpected progeny obtained from glasshouse study of soil pH influence onAcaulospora laevis inoculum. Plant Soil 88, 281–284 (1985). https://doi.org/10.1007/BF02182455
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