Sm. Boyetchko et Jp. Tewari, OCCURRENCE OF VESICULAR-ARBUSCULAR MYCORRHIZAL FUNGI IN ALBERTA, CANADA, Zeitschrift fur Naturforschung. C, A journal of biosciences, 48(11-12), 1993, pp. 923-929
Three VA mycorrhizal fungal species were isolated from soils in Albert
a, Canada and examined by scanning electron microscopy and energy-disp
ersive X-ray microanalysis. Mature spores of Glomus aggregatum develop
ed an outer hyaline wall which contained lower levels of calcium than
the middle wall. Examination of G. pansihalos spores revealed a lower
level of calcium in the outer evanescent wall as compared to the ornam
ented wall. When spores of Entrophospora infrequens were examined, the
wall of the vesicle was found to contain similar levels of calcium as
the ornamented wall of the spore. The significance of the results con
cerning the presence of calcium in mycorrhizal spore walls is discusse
d, as is the occurrence of the mycorrhizal species.