Diversispora trimurales


Voucher Specimens


This description is a combination of information obtained from the protologue (Koske and Halvorson, 1989), type specimens, and universal patterns of morphological organization and structure in Glomeraceae.

In PVLGIn PVLG & Melzer’s reagent
smashed sphere L2 very thick curved linesmahed sporesmashed spore L1 less than 1 fourth thickness l2

Spores formed singly in the soil; pale yellow to pale brownish-yellow; globose, subglobose, ellipsoid, pyriform, or irregular, often lenticular; (60-) 121 (-130) x (70-)118 (-200) µm.

The spore wall consists of three layers (L1, L2, and L3). The outer layer (L1) is rigid, permanent, and consists of several sublayers (laminae), pale yellow to yellow-brown in color, 0.8-2.5 (-3.5) µm thick. This layer is described as fragmenting in some spores to leave irregular plates on the spore surface. The middle layer (L2) is pale yellow to brownish-yellow in color and 1-3 µm thick. The innermost layer (L3) has very fine sublayers (or laminae) that appear indistinct or fuse to take on a homogeneous look, hyaline to pale yellow in color (brownish-yellow in older spores), and 5-l l (-15) µm thick. One of the layers react in Melzer’s reagent.

The subtending hyphae usually is single, straight or slightly constricted at the point of attachment, hyaline to pale yellow in color, and 4.5-8.5 µm wide at the spore base. The hyphal wall consists of all three layers of the spore wall, although the innermost layer (L3) extends only 5-10 µm from the spore; 1-1.5(-2) µm in total thickness at the spore base and thinning to <1 µm thick 5-10 below spore base pore usually occluded by a granular plug.


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High Resolution Images

translucent shiny spheres and irregular ovoids
Spores
smashed sphere
In PVLG
smashed ovoid
In Melzer's Reagent
smashed sphere L1 decaying
In Melzer's Reagent
Still transparent in Melzer's Reagent
In Melzer's Reagent
smashed spore
In Melzer's Reagent

Links to Gene Sequences in Genbank

rRNA genes

beta-tubulin gene


Reference

  • Koske, R. E. and W. L. Halvorson. 1989. Scutellospora arenicola and Glomus trimurales: Two new species in the Endogonaceae. Mycologia 81:927-933 .