Native Arbuscular Mycorrhizal Fungi Promote Growth and Decrease the Infection Levels of .

The use of arbuscular mycorrhizal fungi (AMF) offers promising benefits to agriculture in the Amazon regions, where soils are characteristically acidic and nutrient-poor. The purpose of this research was to investigate the potential effects of two recently described species of AMF ( and ) native to the Peruvian Amazon for improving the plant growth of (inka nut or sacha inchi) and protecting the roots against soil pathogens. Two assays were simultaneously conducted under greenhouse conditions in Peru.

Ancient lineages of arbuscular mycorrhizal fungi provide little plant benefit.

Almost all land plants form symbiotic associations with arbuscular mycorrhizal fungi (AMF). Individual plants usually are colonized by a wide range of phylogenetically diverse AMF species. The impact that different AMF taxa have on plant growth is only partly understood.

Fungal Systematics and Evolution: FUSE 5.

Thirteen new species are formally described: from Pakistan, from India, on from Iran, from China, on species of , , and (Coleoptera, Carabidae) from Nicaragua and Panama, on (Hemiptera, Veliidae) from Brazil, on (Blattodea, Termitidae) from the DR Congo, from Slovenia, from Peru, from China, on from Italy, from , on subsp. from Pakistan. The following new records are reported: on from India; on apple and quince fruits from Iran; from Turkey; and on from Italy; causing tip blight of '' from India; from Madeira, Portugal, new for Macaronesia and Africa; , , and from Russia; on from India; on from Italy; on from Austria; from Turkey; from Wisconsin, USA; and from Turkey.

Changes in an Arbuscular Mycorrhizal Fungi Community Along an Environmental Gradient.

Gradual environmental changes are determining factors in the disposition of plants and associated organisms, such as arbuscular mycorrhizal fungi (AMF). The objective of this study was to evaluate the AMF species communities in a tropical semi-arid region of NE Brazil under decreasing clay content at a mountain top area forming a vegetative mosaic of dry forests, savanna-like shrubland and humid montane forests. Through field and trap culture samples, 80 species of AMF were identified belonging to 25 genera, of which and were the most representative.

Edaphic Factors Influence the Distribution of Arbuscular Mycorrhizal Fungi Along an Altitudinal Gradient of a Tropical Mountain.

Changes in relief in montane areas, with increasing altitude, provide different biotic and abiotic conditions, acting on the species of arbuscular mycorrhizal fungi (AMF). The objective of this work was to determine the influence of altitude, edaphic factors, and vegetation on the AMF species in a mountainous area. The list of AMF species was obtained from morphological identification of the spores, with 72 species recovered from field samples and trap cultures.

Septoglomus altomontanum, a new arbuscular mycorrhizal fungus from mountainous and alpine areas in Andalucía (southern Spain).

A new arbuscular mycorrhizal (AM) fungus was found in Sierra Nevada National Park of Andalucía (Southern Spain). It forms intraradical hyphae, vesicles and arbuscles, typical characteristics of Glomeromycetes. The spores are dark reddish brown to dark reddish black, 132-205 μm diam, and are formed on pigmented subtending hyphae whose pores are regularly closed by a thick septum at the spore base but without support of introverted wall thickening.

Advances in Glomeromycota taxonomy and classification.

Concomitant morphological and molecular analyses have led to major breakthroughs in the taxonomic organization of the phylum Glomeromycota. Fungi in this phylum are known to form arbuscular mycorrhiza, and so far three classes, five orders, 14 families and 29 genera have been described. Sensulato, spore formation in 10 of the arbuscular mycorrhiza-forming genera is exclusively glomoid, one is gigasporoid, seven are scutellosporoid, four are entrophosporoid, two are acaulosporoid, and one is pacisporoid.

Phylogenetic analysis of Glomeromycota by partial LSU rDNA sequences.

We analyzed the large subunit ribosomal RNA (rRNA) gene [LSU ribosomal DNA (rDNA)] as a phylogenetic marker for arbuscular mycorrhizal (AM) fungal taxonomy. Partial LSU rDNA sequences were obtained from ten AM fungal isolates, comprising seven species, with two new primers designed for Glomeromycota LSU rDNA. The sequences, together with 58 sequences available from the databases, represented 31 AM fungal species.

Arbuscular mycorrhizal fungi in a semiarid copper mining area in Brazil.

The occurrence of arbuscular mycorrhizal fungi (AMF) in a copper mining area was investigated. Soil samples were collected from six sites at the Mineração Caraiba, Bahia State, northeastern Brazil, comprising: (1) a site that receives the waste product; (2) a site that receives low grade deposits; (3) the interface between the caatinga and site 1; (4) the surroundings of the industrial area; (5) the site for extracting topsoil for land filling; (6) the preserved caatinga. Thirty-two plant species were identified around the collection locations.