ABSTRACT Grapevine decline and death caused by the pathogenic fungus Fusarium oxysporum f. sp. herbemontis is among the main phytosanitary problem for viticulture in southern Brazil. The eradication of infected plants is presently the most common procedure for disease control in vineyards. Inoculation with arbuscular mycorrhizal fungi is an option to reduce or neutralize the negative impacts of soil pathogenic microorganisms, but the mechanisms of plant response involved in this process are not yet completely elucidated. In order to better […]

ABSTRACT: The production of tree seedlings with high survival rate and growth is influenced by the substrate, which may be composed of biological and non-biological materials that help plant growth. The objective of this study was to evaluate the efficiency of a mycorrhizal inoculant on farm and the use of a potassic rock (phonolite) on growth and nutrition of Eucalyptus saligna Sm. and Schinus terebinthifolius Raddi under greenhouse conditions. Both species were assigned to three mycorrhizal treatments [no inoculated control […]

The olive tree is a temperate climate plant, whose fructification requires low temperatures before flowering. The production of good quality seedling material is essential for establishing an orchard, and association with arbuscular mycorrhizal fungi (AMF) can be very important in this respect. In Brazil, there are no studies related to the use of AMF in olive seedling production. The aim of this study was to evaluate the effect of the use of different AMF species on the development of seedlings […]

Arbuscular mycorrhizal fungi (AMF) play an important role in natural ecosystems as they influence plant nutrition and soil structure. The aim of this study was to determine the mycorrhizal inoculum potential and the relationship between mycorrhizal mycelium length of AMF and aggregation of riparian soils. Soil samples were collected in riparian areas in the Itajai Açu river watershed, between the municipalities of Gaspar and Navegantes, Santa Catarina, Brazil. Eight areas were sampled within three soil classes: Cambissolo (Inceptisol) (C), Gleissolo […]

Production of arbuscular mycorrhizal fungi (AMF) inoculum using the on-farm method is an alternative to stimulate the use of microbial inoculant in plant production systems and to reduce the cost associated with purchase of this product. The goal of this study was to evaluate the potential of residues from the forestry industry, pine bark (CP) and pulp sludge (LC), as components of the substrate used to produce on-farm mycorrhizal inoculum. Sorghum plants pre-colonized with the AMFs Claroideoglomus etunicatum RJN101A and […]

The Pantanal (tropical wetland) biome is recognized as one of the largest continuous areas of natural wetlands, harboring a flora and fauna of rare beauty and abundance. Studies to assess the diversity of arbuscular mycorrhizal fungi (AMF) are nonexistent for this environment. The goal of this study was to evaluate the occurrence of AMF in different vegetation types of the Pantanal of Nhecolândia, Brazil. Soil samples were collected during the dry and wet season in a Neossolo Quartzarênico (Entisol) in […]

The arbuscular mycorrhizal association established between arbuscular mycorrhizal fungi (AMF-phylum Glomeromycota) and plant roots plays an essential role in plant survival and nutrition. In this review, the idea is outlined that the triad “riparian forest-carbon sequestration-arbuscular mycorrhizal fungi” should be taken into consideration as an environmentally compatible strategy for the recovery of areas formerly covered by riparian forests. We briefly discuss the soil classes found in riparian areas and the C input in terrestrial ecosystems. AMF play an important role […]

Under certain circumstances, Mn toxicity may be alleviated in mycorrhizal plants. Direct and indirect mechanisms can be involved in this process. Our objective was to evaluate the intrinsic effect of arbuscular mycorrhizal fungi (AMF) on the uptake and translocation of Mn by soybean plants. Initially, three AMF were tested to determine their capacity in enhancing plant growth under Mn excess. Glomus macrocarpum was most efficient at protecting plants against Mn excess, as a result of a higher Mn retention in […]

In order to be used in a program of inoculation, efficient arbuscular mycorrhizal fungi (AMF) must be able to cope with the indigeneous fungal population. An experiment was conducted under greenhouse conditions at the Embrapa Cassava and Fruit Crops in Cruz das Almas (BA), Brazil, with the objective to evaluate the competitive capability of selected fungi, using natural soil with Tainung no. 1 variety. A Yellow Oxisol with 3 mg dm-3 of available P was used. Three exotic and three […]

The adverse effects of the heavy metals on all living forms make rehabilitation of heavy metal-contaminated soils very difficult. In this paper, the effects of seedling inoculation with arbuscular mycorrhizal fungi (AMF) on post-transplant growth and metal uptake of five woody species: (Senna multijuga (L.C. Rich.) Irwin et Barneby (cássia verrugosa), Luehea grandiflora Mart. et Zucc. (açoita-cavalo), Enterolobium contortisiliquum (Vell.) Morong (tamboril), Albizia lebbeck (L.) Benth. (albizia) and Senna macranthera (Collard.) Irwin et Barneby (fedegoso)) in soil mixes containing increasing […]