Phylum:Zygomycota >> Class: Zygomycetes >>  Order: Glomales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Glomus chimonobambusae

Glomus chimonobambusae Wu, sp. nov.(Fig. 1-5)

 Description: Sporae subhyalinae vel albae, singulatae in solo, globosae, subglobosae, 110-180 μm diametro, vel obovatae, ellipsoidae, triangulatae, irregulares, 120-180 × 130-200 μm. Sporae pagina tecta a verrucis minutis et projecturis grossis, clavatis usque ad 12 μm longas. Sporae tunica e stratis quatuor: exteriore 3.5-4.5 μm crasso, secundo 1.5-2 μm crasso, tertio <0.5 μm crasso adhaerenti arte ad tunicam quartum, quarto, 1.5 μm crasso, in iodo rubro subroseo. Mycorrhizae vesicular-arbusculares formans. Spores subhyaline or white, borne singly in the soil, globose, subglobose, obovoid, triangular, or irregular. If spores globose or subglobose, 110-180 m diam.; if obovoid, ellipsoid, irregular, 120-180 × 130-200 μm. Spore surface covered by tiny warts and coarse, clavate projections up to 12.5 μm long. Spore wall distinguished by two groups, four layers. Wall 1, ornamented by warts and projections, laminated, 3.5-4.5 μm thick; wall 2, closely adherent to wall 1, 1.5-2 μm thick; wall 3, <0.5 μm thick, closely attached to wall 4; wall 4, 1.5 μm thick. Attached hypha, semihyaline or white, 8-16 μm diam, tubular, constricted at the attachment. Below the spore base, 30-45 μm, some hyaline, fragile hyphal branches, 1-1.5 μm diam., formed along attached hypha. Attachment occluded by wall thickening. Wall of attached hypha warted for some distance below the attachement, 1-2 μm thick. Reaction to Melzer's reagent, wall 1 and wall 2, yellow, and wall 4, pinkish red. Reaction to lactophenol cotton blue reagent, spore walls, all cyanophilous. Germination tube directly penetrating through the spore wall. Forming typical vesicular-arbuscular mycorrhizae.

TAIWAN: Nantou, Chi-tou experimental station. HOLOTYPE: From the rhizosphere of Chimonobambusa quadrangularis (Fenzi) Makino, Wu-82041201(TARI). ISOTYPE: From the rhizosphere of the same host, Wu-82040101 (TARI).

 Habitat: Hypogenous. Spores were isolated from the bamboo garden in Chi-tou experimental station, National Taiwan University. The spores of Glomus chimonobambusae were isolated together with the spores of Acaulospora elegans Trappe and Gerdemann, A. rehmii Sieverding and Toro, Glomus etunicatum Becker and Gerdemann, and Entrophospora infrequens (Hall) Ames and Schneider.





C. G. Wu

 Note: Etymology: Latin, chimonobambusae refers to the genus name of host (Chimonobambusa quadrangularis) from the rhizosphere of which the spores were recovered. Glomus chimonobambusae Wu is distinguished from other species of Glomus by its magnificent ornaments on spore wall. The morphology of attached hyphae of the present species is very similar to Glomus constrictum Trappe. The attached hypha is often constricted at the attachment. Some hyaline, fragile hyphal branches, beyond the attachment, are frequently formed from the inflated attached hypha. Sometimes, a septum is formed in the inflated hypha. The spore surface of Glomus multicaule Gerdemann and Bakshi is also covered by rounded projections; however, they are much shorter than those of G. chimonobambusae. The wall structure, lack of inner membranes, tubular attached hyphae and contents of variably sized oil globules of G. chimonobambusae are all typical of the genus Glomus. However, the ornamentations on outer wall of G. chimonobambusae are very similar to those of Scutellospora dipapillosa (Walker & Koske) Walker and Sanders (Koske and Walker, 1985). Outer walls of both species are decorated by densely crowded small, conical warts and hyaline, blunt, larger projections. Both species are different by their spore color, type of attached hypha and wall structures.