Distribution of Sporangiospores of Mucor piriformis in Pear Orchard Soils

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Abstract
Sporangiospores of Mucor piriformis were found to have a clustered spatial distribution in both vertical and horizontal planes of the soil in pear orchards. Between 76 and 93% of the spores detected were found in the top 2 cm of the soil profile, and spore numbers decreased rapidly with increasing depth. In the horizontal plane, the frequency count data for sporangiospores were described with a negative binomial model. This clustered spatial pattern reflects the colonization of a limited substrate with an irregular distribution as well as limited spore dispersal.

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