Lc. Maia et Jw. Kimbrough, ULTRASTRUCTURAL STUDIES OF SPORES AND HYPHA OF A GLOMUS SPECIES, International journal of plant sciences, 159(4), 1998, pp. 581-589
The ultrastructure of spores and hyphae of a Glomus isolate (INVAM-906
/312); structure and development are described with both light and tra
nsmission electron microscopy. The spore wall is formed by two layers
in one group; the outer is evanescent and formed by an amorphous matri
x, whereas the inner wall layer is laminated and has fibrils that seem
to be arranged in an arcuate pattern as observed in other glomalean s
ports The spore has a more complex wall structure than hyphae. The con
tent of both spore and hyphae also differs regarding the presence and
distribution of lipid globules, vesicles, and other structures. Intrac
ytoplasmic bacterium-like organisms (BLOs) were observed in spores and
germ tubes; some of these BLOs were apparently undergoing binary fiss
ion.