Marta Cabello - Academia.edu (original) (raw)

Papers by Marta Cabello

Boletín de la Sociedad Argentina de Botánica

Introducción y objetivos: Se presenta una lista de musgos registrados en la Reserva Natural Punta... more Introducción y objetivos: Se presenta una lista de musgos registrados en la Reserva Natural Punta Lara (Buenos Aires, Argentina) con el objetivo de ampliar el conocimiento sobre la distribución de las especies presentes en el país. M&M: Los especímenes fueron recolectados e identificados de acuerdo a los criterios taxonómicos convencionales y depositados en el Herbario del Instituto Spegazzini (LPS). Registros del Servicio de Información sobre la Diversidad Biológica Mundial (GBIF) fueron consultados como fuente de información sobre la distribución de las especies. Resultados: Como resultado de este estudio se identificaron 15 especies de musgos pertenecientes a 11 familias en la Reserva Natural Punta Lara. Se cita por primera vez para Argentina la especie Sematophyllum adnatum (Michx.) E. Britton y el género Thamnomalia Olsson, Enroth & Quandt, representado por Thamnomalia glabella (Hedw.) Olsson, Enroth & Quandt. Discusión y Conclusiones: En este trabajo se registran dos nuevas ci...

Diversity

The evolutionary history of the symbiotic association between arbuscular mycorrhizal fungi (AMF) ... more The evolutionary history of the symbiotic association between arbuscular mycorrhizal fungi (AMF) and embryophytes dates back to the Devonian period. Previous ecological and physiological studies have described the presence of arbuscules, inter- and intracellular hyphae, vesicles, coils and spores, in liverworts and hornworts, which are considered absent in mosses. This study aimed to report the presence of AMF in a community of bryophytes (mosses and liverworts) from Punta Lara Natural Reserve, Argentina. Senescent and green sections of gametophytes were stained and, following microscopic observation, revealed AMF structures. We found intracellular hyphae, vesicles, spores and sporocarps associated with thallus and rhizoids of mosses and liverworts and senescent moss caulidia. The morphological characterization of spores resulted in the determination of Rhizophagus intraradices and Dominikia aurea. The species D. aurea is reported for the first time for Argentina. Sequencing of the ...

Encuentro de Becarios de la UNLP (EBEC) (La Plata, 2018), Apr 3, 2019

Advances in Natural Sciences: Nanoscience and Nanotechnology, 2021

Green chemistry is the preferred approach for the synthesis of metal and metal oxide nanoparticle... more Green chemistry is the preferred approach for the synthesis of metal and metal oxide nanoparticles due to its environmental friendliness, feasibility, and safety to human health when compared with other chemical or physical methods. Caesalpinia spinosa is a promising resource to be applied in the green synthesis of metallic nanoparticles due to the high amount of polyphenols. The aim of the present research was to obtain an antifungal coating functionalised with nanoparticles synthesised from C. spinosa tannin and aqueous solutions of metallic (silver and copper) salts to control biodeterioration of acrylic paints and bricks. Green synthesised NPs were characterised by UV-vis spectroscopy, transmission electron microscopy (TEM), Fourier transformed infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS). The silver nanoparticles with average size of 12 nm and obtained from a 500 ppm aqueous solution of C. spinosa tannin inhibit...

Acta Botanica Brasilica, 2021

New Zealand Journal of Forestry Science, 2019

Background: Management practices can modify the productivity of forests and the associated microb... more Background: Management practices can modify the productivity of forests and the associated microbial diversity of soil. The soil mycobiota is considered a key factor in the ecological functions of forests. Forests of Nothofagus pumilio (Poepp. & Endl.) Krasser (Nothofagaceae) are the main source of timber and one of the most important economic resources in the province of Tierra del Fuego (Argentina). However, there is no information on the impact of forest management interventions for the soil mycobiota, which can be reliable biological indicators of disturbance.Methods: Fungi were isolated from samples of soil collected under several Nothofagus pumilio forests subjected to different types of management and periods of time since the intervention. Types of management were represented by harvested forest with a shelter wood cutting, stockpile area and control forest without intervention and the periods of time since intervention were 1, 5–10 and 50 years. Species richness, evenness a...

Rangeland Ecology & Management, 2019

Applied Soil Ecology, 2013

Glyphosate is a systemic non-selective herbicide, the most widely used in the world. Alongside wi... more Glyphosate is a systemic non-selective herbicide, the most widely used in the world. Alongside with its use in agricultural and forestry systems, this herbicide is used in grasslands in late summer with the aim of promoting winter species with the consequent increase in stocking rate. However, its effects on non-target organisms, such as arbuscular mycorrhizal fungi (AMF), are unclear. Arbuscular mycorrhizal fungi (AMF) colonize the root of more than 80% of terrestrial plants, improving their growth and survival, and therefore playing a key role in ecosystem structure and function. The aim of this work was to investigate the possible pathways through which glyphosate application affects AMF spores viability and root colonization in grassland communities. Our hypothesis is that glyphosate application can damage AMF directly (through contact with spores and external hyphae) or indirectly through the changes it generates on host plants. The experiment had a factorial array with three factors: (1) plant species, at two levels (Paspalum dilatatum and Lotus tenuis), (2) doses of glyphosate, at three levels (0 l ha −1 , 0.8 l ha −1 and 3 l ha −1), and (3) application site, at two levels: soil (direct pathway) and plant foliage (indirect pathway). Spore viability was reduced even under the lowest glyphosate rate, but only when it was applied on the soil. Total root colonization for both species was similarly decreased when glyphosate was applied to plant foliage or on soil, with no difference between 0.8 and 3 l ha −1. The number of arbuscules was 20% lower when glyphosate was applied on plant foliage, than when it was applied on the soil. Our findings illustrate that glyphosate application negatively affects AMF functionality in grasslands, due to different causes depending on the herbicide application site. While, under field conditions, the occurrence of direct and/or indirect pathways will depend on the plant cover at the time of glyphosate application, the consequences of this practice on the plant community structure will vary with the mycorrhizal dependence of the species composition regardless of the pathway involved.

AgriScientia

En ambientes severos, la presencia de hongos micorrícicos arbusculares (HMA) es clave para la sup... more En ambientes severos, la presencia de hongos micorrícicos arbusculares (HMA) es clave para la supervivencia de las plantas y el balance ecosistémico. El objetivo de este trabajo fue caracterizar los hongos micorrícicos presentes en sitios de algarrobales (Prosopis alba) del Parque Chaqueño argentino de condiciones climáticas contrastantes: húmedo, Colonia Benítez, y semiárido, Padre Lozano. Los sitios de Colonia Benítez y Padre Lozano presentaron diferencias edafológicas significativas, destacándose el menor contenido de materia orgánica y fósforo, y el mayor porcentaje de sodio intercambiable en Colonia Benítez, asociados a una mayor capacidad infectiva y mayor potencial micorrícico de inóculo. En los suelos sólo se encontró una especie común: Acaulospora laevis, propia de ambientes áridos. En los inóculos se registraron tres especies en común: Funneliformis mosseae, Rhizophagus intraradices, Claroideoglomus etunicatum; dos especies exclusivas de Colonia Benítez, Septoglomus constr...

Agroforestry Systems, 2019

Prosopis alba Griseb. (algarrobo blanco) is an important tree legume in semiarid regions of South... more Prosopis alba Griseb. (algarrobo blanco) is an important tree legume in semiarid regions of South America. Under field conditions, their seedlings are subjected to a wide range of environmental conditions that might produce stress, reducing their survival and/or growth. The aim of this work was to evaluate the combined effect of two native arbuscular mycorrhizal fungi (AMF) inocula and fertilization on growth variables of P. alba seedlings under nursery conditions and after drought stress. P. alba seedlings received different levels of basic fertilization (0%, 25% and 100%) and were inoculated with native AMF isolated from different rainfall regions of Parque Chaqueño Argentino: Colonia Benítez (CB, 1300 mm rainfall) and Padre Lozano (PL, 650 mm rainfall) or a mixture of both inocula (MIX), while the control group remained uninoculated. The combined application of native AMF and fertilization did not affect mycorrhizal colonization but allowed the formation of the different AMF structures. Moreover, when comparing the PL inoculum from a low rainfall region with other treatments, it significantly increased growth and development under nursery conditions and drought stress tolerance in the greenhouse. Therefore, AMF benefits for P. alba were related to inoculum source, being improved by the application of low fertilizer rates. This work supports the development of sustainable P. alba seedlings production and their field establishment under symbiotic conditions with native AMF. Keywords ''Algarrobo blanco'' Á Mineral nutrition Á Mycorrhizae Á Nursery Á Water stress

Journal of Pest Science, 2020

Fall armyworm (FAW), Spodoptera frugiperda, is a migratory polyphagous pest that causes major dam... more Fall armyworm (FAW), Spodoptera frugiperda, is a migratory polyphagous pest that causes major damage to economically important cultivated grasses, such as corn. Native to the neotropics in America but recently reported as an invasive pest in Africa and Asia, FAW imposes a serious threat to food security and sustainable crop productivity due to lack of effective management. In this study, the introduction of entomopathogenic fungi as endophytes was explored as an alternative more sustainable management strategy against FAW in corn. The study determined (1) the effect of isolates and inoculation methods on the ability of entomopathogenic fungi to colonize corn plants, and (2) the effect of colonized plants on S. frugiperda survival, development, reproduction, and food preference. Although all tested isolates (twelve of Beauveria bassiana and one each of Metarhizium anisopliae and Metarhizium robertsii) colonized inoculated plants, there was a highly significant interaction between isolates and inoculation methods. Highest plant colonization was obtained by Beauveria bassiana isolate (LPSc 1098) using foliar spray. Endophytic B. bassiana caused significant reductions in larval and pupal survival, length of different developmental stages, total S. frugiperda lifespan, and leaf area consumed by third instar larvae. Plant colonization also significantly reduced female longevity, fecundity, and fertility. This is the first report for the negative effects of endophytic B. bassiana on S. frugiperda growth, reproduction, and food preference. Our results highlight the promising potential of incorporating entomopathogenic fungi as endophytes in integrated pest management practices to protect corn against FAW if their efficacy is also confirmed under field conditions.

Nova Hedwigia, 2018

Cordyceps locustiphila is described, illustrated, and compared with a previous finding. This spec... more Cordyceps locustiphila is described, illustrated, and compared with a previous finding. This species was collected infecting Tropidacris collaris in the Yabotí biosphere reserve, Misiones province, Argentina. Until now, this entomopathogenic fungus has not been reported affecting T. collaris, and it is the first report for Argentina. From the cordyceps-like stromata of C. locustiphila it was possible to isolate for the first time the acremonium-like anamorph of this fungus. The identity of both, anamorph and teleomorph, was determined by morphological and molecular taxonomic studies, which challenges the recent new combination into Beauveria.

Journal of King Saud University - Science, 2018

The soybean is a crop of economic importance and has a great number of potential pests which caus... more The soybean is a crop of economic importance and has a great number of potential pests which cause significant economic losses. The entomopathogenic fungi Beauveria bassiana, Metarhizium anisopliae and Metarhizium robertsii are important biological control agents, which can live as endophytes within plants and causes no apparent damage to the host. The aims of this study were to assess whether the entomopathogenic fungi B. bassiana, M. manisopliae and M. robertsii are able to colonize soybean plants as endophytes by using different inoculation techniques; and assess if these fungi produce any effect on the growth and yield of soybean plants under field conditions. We demonstrate the effectiveness of three inoculation methods (foliar spray, seed immersion and root immersion) to establish fungal entomopathogens as endophytes. Percentage of recovery for the different fungal strains was higher after 7 days of inoculation, through the organ that was in direct contact with the fungus during the inoculation. B. bassiana LPSc 1098 inoculated by leaf aspersion was the most successful strain. It was also demonstrated for the first time that inoculation with B. bassiana promoted the growth and increased the yield of soybean plants under filed conditions, with no adverse effects observed in the inoculated plants.

Darwiniana, nueva serie, 2017

In this article, the state of art of the mycology in Argentina is highlighted, with the purpose o... more In this article, the state of art of the mycology in Argentina is highlighted, with the purpose of reviewing the advances that allowed positioning this discipline worldwide. It reviews the main areas of research, laboratories recognized, and the researchers for the country.

Fusarium verticillioides (Saccardo) Nirenberg (Ascomycota: Hypocreales) is the most common fungus... more Fusarium verticillioides (Saccardo) Nirenberg (Ascomycota: Hypocreales) is the most common fungus reported on infected corn kernels and vegetative tissues, but has not yet been documented as being entomopathogenic for grasshoppers. Grasshoppers and locusts represent a large group of insects that cause economic damage to forage and crops. Tropidacris collaris (Stoll) (Orthoptera: Acridoidea: Romaleidae) is a large and voracious grasshopper that in recent years has become an increasingly recurrent and widespread pest in progressively more greatly extended areas of some of in Argentina's northern provinces, with chemical insecticides being currently the only means of control. During February and March of 2008-09, nymphs and adults of T. collaris were collected with sweep nets in dense woodland vegetation at a site near Tres Estacas in western Chaco Province, Argentina, and kept in screened cages. F. verticillioides was isolated from insects that died within 10 days and was cultured...

Pathogenic and enzyme activities of the entomopathogenic fungus