Glomus trufemii (Glomeromycetes), a new sporocarpic species from Brazilian sand dunes

Abstract

Glomus trufemii, which forms large aggregates (≤ 850 × 1200 μm) in the rhizosphere of a herbaceous plant community in NE Brazilian sand dunes, is described as new. Its subglobose glomerospores measuring 72–92 × 79–105 μm have two spore wall layers: an evanescent hyaline 0.3–0.8 μm thick outer layer and a laminate orange brown to dark red brown 7.4–15.5 μm thick inner layer. The pigmentation of the subtending hypha is similar but often much lighter than that of the laminate spore wall layer. The spore size and color, spore wall structure, and features of the spore base and subtending hyphae separate this species from similar yellow-brown to brown spored species like G. badium, G. glomerulatum, and G. brohultii.

Glomus herrerae, a new sporocarpic species of Glomeromycetes from Cuba

“…Sporocarps of G. herrerae are similar with that G. ambisporum G.S. (Oehl et al 2011d;Goto et al 2012c). Glomus herrerae, G. ambisporum and G. heterosporum produce large dark brown sporocarps, but only G. ambisporum and G. heterosporum produce dimorphic spores.…”

“…Glomus fuegianum may be distinguished from G. herrerae mainly by the presence of three layers on the spore wall, furthermore, its sporocarps occasionally present a peridium and it produces pale yellow spores, differing to G. herrerae that vary from orange brown to dark red brown. G. trufemii presents very similar sporocarps in color and size, however, the spores size (72-92 × 79-105µm) and laminated layer (7.4-15.5µm) are smaller and has not Melzer's reaction in the second layer (Goto et al 2012c). …”

“…The selected place were: A semi-natural savannah with certain degree of disturbance, product of a cattle low-intensity activity at close zones ( Sampling and morphological analyses Sporocarps were extracted from the soil samples as describing in Furrazola et al (2011). Subsequently, the analysis of sporocarps and spores were similar to described in recent published papers (Furrazola et al 2011, Goto et al 2012c). Spores were mounted on microscope slides either in water, to check unmodified characteristics of spore wall components (Spain 1990) and colour, or permanently in in polyvinyl-alcohol-lacto-glycerin (PVLG), PVLG + Melzer's reagent (Brundrett et al 1994).…”

“…The terminology used to species description was Oehl et al (2011a), Furrazola et al (2011) and Goto et al (2012c). To spore denomination Goto & Maia (2006) was used.…”

Second world record of Glomus trufemii (Glomeromycota: Fungi), an arbuscular mycorrhizal fungus from a Mexican savanna

“…The taxonomical identification was made by comparison and contrast of morphological characters of the spores and with glomoid species at the International Collection of Vesicular and Arbuscular Mycorrhizal Fungi (INVAM) (http://invam.wve.edu/), the web page of Prof. Janusz Blaszkowski (http://www. zor.zut.edu.pl/Glomeromycota/), and Glomus species newly described (Goto et al, 2012 Glomus trufemii. Similar glomoid sporocarpic species are G. aureum Oehl & Sieverd., which contains amorphous material, and the layer sw1 of the spore wall staining with Melzer's reagent (Oehl et al, 2003); Funneliformis badium (Oehl, D. Redecker & Sieverd.…”