Eugenia Menoyo

Universidad Nacional de San Luis · Área de Ecología

Plants associated with mycorrhizal fungi has the ability to establish on metal-contaminated soils playing an important role in phytoremediation programs. The objective of this study was to examine the presence of arbuscular mycorrhizal fungi (AMF) (spores density, diversity, indicator species, and root colonization) and dark septate endophytic fung...

Heavy metal (HM) soil contamination is an environmental problem since metals can accumulate in the soil and be introduced into the food chain of organisms endangering the quality of the entire ecosystems. A wide diversity of plant species called metallophyte, especially the hyperaccumulator plants, has a great capacity to accumulate HM and can be u...

Background and aims: Algae and Cyanobacteria species that grow in contaminated sites can accumulate high concentrations of heavy metals. In this work it was proposed to a) characterize the community of algae and Cyanobacteria and b) evaluate the effect of lead (Pb) on the composition of algae present in the rhizosphere of plants capable to accumula...

Introducción y objetivos : Las especies de algas y Cyanobacteria que crecen en sitios contaminados pueden acumular altas concentraciones de metales pesados. En este trabajo se propuso a) caracterizar la comunidad de algas y Cyanobacteria y b) evaluar el efecto del plomo (Pb) sobre la composición de algas presentes en la rizosfera de plantas capaces...

In arid highland environments harsh conditions for vegetation establishment prevail. Plants in these environments develop different strategies to survive, including associations with fungal root endophytes. These associations may improve plant growth, helping plant resistance to adverse environments. The aim of this study was to determine the relat...

The impact of lead (Pb) pollution on native communities of arbuscular mycorrhizal fungi (AMF) was assessed in soil samples from the surroundings of an abandoned Pb smelting factory. To consider the influence of host identity, bulk soil surrounding plant roots soil samples of predominant plant species (Sorghum halepense, Bidens pilosa, and Tagetes m...

In South America (SA), Highlands above-treeline stretch along 7000 km in a North-South direction, occupying almost 694,000 km², most of it is located in the Andean region except for 34,500 km² in the Chaco region. In these Highlands are represented very particular ecoregions and phytogeographic areas in desertic, arid and semiarid biomes with chara...

The high mountain ecosystems of South America represent one of the main hotspots of biodiversity. There is an increasing interest in disentangling global patterns of arbuscular mycorrhizal fungi (AMF). Recently studies postulated that the majority of AMF taxa are cosmopolitan, although community composition changes depend on microscale and macrosca...

Este Manual tiene fines académicos orientados a contribuir con la formación de estudiantes, investigadores e interesados en la temática. ÍNDICE Protocolo 01: Detección de Hongos Micorrícicos Arbusculares en raíces mediante Tinción con Azul de Tripán. Protocolo 02: Determinar la vitalidad de hifas de HMA mediante Tinción con la Enzima Succinato-...

Este Manual tiene fines académicos orientados a contribuir con la formación de estudiantes, investigadores e interesados en la temática

Heavy metal (HM) pollution of soils is one of the most important and unsolved environmental problems affecting the world, with alternative solutions currently being investigated through different approaches. Arbuscular my-corrhizal fungi (AMF) are soil inhabitants that form symbiotic relationships with plants. This alleviates HM toxicity in the hos...

The Andean Puna is an arid, high-elevation plateau in which plants such as grasses experience high abiotic stress and distinctive environmental conditions. We assessed colonization by arbuscular mycorrhizal fungi (AMF) and dark septate endophytes (DSE) in the roots of 20 native grass species and examined the relationship between root-associated fun...

Since root endophytes may ameliorate drought stress, understanding which plants associate with endophytes is important, especially in arid ecosystems. Here, the root endophytes were characterized of 42 plants from an arid region of Argentina. Colonization by arbuscular mycorrhizal fungi (AMF) and dark septate endophytes (DSEs) was related to plant...

This book presents current research from across the globe in the study of the identification, conservation, and restoration of native species. Topics discussed include soil microbiology influencing biodiversity conservation of natural ecosystems; the native breed of domestic cattle in Southwest England; native plants of northeastern Mexico and thei...

Polylepis woodlands are one of the most threatened mountain ecosystems of South America, and their restoration is a high priority. To assess the mycorrhizal status in Polylepis woodlands of “Quebrada del Condorito” National Park (Córdoba Mountains, Central Argentina), we examined the roots of 22 plant species, belonging to 14 families and determine...

Arbuscular mycorrhizas and dark septates endophytes in native Gentianaceae from Argentina. The roots of five native species of Gentianaceae distributed in different environments of Argentina, four belonging to Gentianella and one to Gentiana, were studied for fungal symbionts colonization. Arbuscular mycorrhizal structures belonging to Paris type (...

Puna is a harsh bio-geographical region in South America that characterized by distinct plant diversity, high aridity and irradiance. In the present study, rhizospheric bacterial communities were analyzed along an altitudinal gradient in this region while considering the different photosynthesis pathways (C3/C4) of the native grasses. This analysis...

Polylepis australis trees endemic to Argentina dominate the canopy of subtropical high altitude forests. Here, livestock rearing is the main economic activity and is suspect of the low performance of P. australis trees through direct and indirect effects which could include the reduction in arbuscular mycorrhizal fungi (AMF) and their benefit to tr...

In this study we investigated the capacity of Andean alder (Alnus acuminate Kunth), inoculated withFrankia and two ectomycorrhizal fungi (Alpova austroalnicola Dominguez andAlpova diplophloeus ([Zeller and Dodge] Trappe and Smith), for nodulation and growth in pots of a soilless medium that contained vermiculite or a mixture of ground basalt rock a...

Rhizospheric soil samples were taken from Puna native grasses along an altitudinal gradient. Biodiversity of arbuscular mycorrhizal fungi (AMF) and associated bacteria was analyzed considering altitude and grasses photosynthetic pathways (metabolic type C3, C4). Cultivation-dependent approaches were applied to obtain further information about the p...

South American high-mountain ecosystems are greatly influenced by human disturbance. In the mountains of Córdoba, Argentina, Polylepis australis (Rosaceae) woodlands are currently highly fragmented and subject to extensive burning and livestock grazing, resulting in severe changes of habitat characteristics, which hamper natural regeneration. In or...