A5027717613- Legume Nitrogen Fixing Symbiosis
- Plant nutrient uptake and metabolism
- Agronomic Practices and Intercropping Systems
- Soil Carbon and Nitrogen Dynamics
- Plant-Microbe Interactions and Immunity
- Microbial Community Ecology and Physiology
- Plant and soil sciences
- Mycorrhizal Fungi and Plant Interactions
- Nematode management and characterization studies
- Plant Disease Resistance and Genetics
- Plant Pathogenic Bacteria Studies
- Invertebrate Taxonomy and Ecology
- Medieval European Literature and History
- Soil Science and Environmental Management
- Genetically Modified Organisms Research
- Soil Management and Crop Yield
- Soil Geostatistics and Mapping
- Soil and Unsaturated Flow
- Plant Micronutrient Interactions and Effects
- Agriculture and Rural Development Research
- Scientific Computing and Data Management
- Soil and Water Nutrient Dynamics
- Genomics and Phylogenetic Studies
- Research Data Management Practices
- Crop Yield and Soil Fertility
National University of Quilmes
2016-2025
Consejo Nacional de Investigaciones Científicas y Técnicas
2016-2024
Centro Científico Tecnológico - San Juan
2015-2024
Wageningen University & Research
2023
Washington State University
2015
Health Canada
2015
Johns Hopkins University
2015
Public Health Department
2015
National University of Comahue
2006
Umeå University
1997
Genomic traces of symbiosis loss A between certain bacteria and their plant hosts delivers fixed nitrogen to the plants. Griesmann et al. sequenced several genomes analyze why nitrogen-fixing is irregularly scattered through evolutionary tree (see Perspective by Nagy). Various carried lost pathways that could have supported symbiosis. It seems this symbiosis, which relies on multiple complex interorganismal signaling, susceptible selection prone being over time. Science , issue p. eaat1743 ;...
Soil bacteria that also form mutualistic symbioses in plants encounter two major levels of selection. One occurs during adaptation to and survival soil, the other concert with host plant speciation adaptation. Actinobacteria from genus Frankia are facultative symbionts N 2 -fixing root nodules on diverse globally distributed angiosperms “actinorhizal” symbioses. Three closely related clades sp. strains recognized; members each clade infect a subset among eight angiosperm families. We...
ABSTRACT In soil ecosystems, bacteria must cope with predation activity, which is attributed mainly to protists. The development of antipredation strategies may help maintain higher populations and persist longer in the soil. We analyzed interaction between root-colonizing biocontrol strain Pseudomonas fluorescens CHA0 three different protist isolates (an amoeba, a flagellate, ciliate). produces set antibiotics, HCN, an exoprotease. observed that protists cannot grow on but can multiply...
Spontaneous mutants of Rhizobium meliloti L5-30 defective in motility or chemotaxis were isolated and compared against the parent with respect to symbiotic competence. Each was able generate normal nodules on host plant alfalfa (Medicago sativa), but had slightly delayed nodule formation, diminished nodulation initially susceptible region root, relatively low representation following co-inoculation equal numbers parent. When inoculated growth pouches increasing dosages parental strain,...
The rise in the world demand for food poses a challenge to our ability sustain soil fertility and sustainability. increasing use of no-till agriculture, adopted many areas as an alternative conventional farming, may contribute reduce erosion soils increase carbon pool. However, advantages agriculture are jeopardized when its is linked expansion crop monoculture. aim this study was survey bacterial communities find indicators quality related contrasting management under farming. Four sites...
The goal of this study was to investigate the spatial turnover soil bacterial communities in response environmental changes introduced by practices soybean monoculture or crop rotations, relative grassland soils. Amplicon sequencing 16S rRNA gene used analyse diversity producer fields through three successive cropping cycles within one and a half years, across regional scale Argentinean Pampas. Unlike local diversity, which not significantly affected land use type, agricultural management...
Only species belonging to the Fabid clade, limited four classes and ten families of Angiosperms, are able form nitrogen-fixing root nodule symbioses (RNS) with soil bacteria. This concerns plants legume family (Fabaceae) Parasponia (Cannabaceae) associated Gram-negative proteobacteria collectively called rhizobia actinorhizal Gram-positive actinomycetes genus Frankia. Calcium calmodulin-dependent protein kinase (CCaMK) is a key component common signaling pathway leading both rhizobial...
We report here the genome sequence of Frankia sp. strain CN3, which was isolated from Coriaria nepalensis. This is first fourth lineage Frankia, strains are unable to reinfect actinorhizal plants. At 10 Mb, it represents largest sequenced date.
Plant root-nodule symbiosis (RNS) with mutualistic nitrogen-fixing bacteria is restricted to a single clade of angiosperms, the Nitrogen-Fixing Nodulation Clade (NFNC), and best understood in legume family. Nodulating species share many commonalities, explained either by divergence from common ancestor over 100 million years ago or convergence following independent origins that same time period. Regardless, comparative analyses diverse nodulation syndromes can provide insights into...
ABSTRACT Frankia forms a nitrogen-fixing symbiosis with actinorhizal plants. We report draft genome sequence for sp. strain BCU110501, actinobacterium isolated from nodules of Discaria trinevis grown in the Patagonia region Argentina.
The diversification and intensification of crop rotations (DICR) in no-till systems is a novel approach that aims to increase production, together with decreasing environmental impact. Our objective was analyze the effect different levels DICR on abundance, biomass, species composition earthworm communities Argentinean Pampas. We studied three DICR—typical rotation (TY), high grass (HG), legume (HL); along references—natural grassland (NG), pasture (PA), an agricultural external reference...
ABSTRACT Background Water is one of the most important natural resources in agricultural systems, and adoption irrigation systems producing expansion productive agriculture frontier Northern Patagonia's arid zone (Argentina). It critical to evaluate how management shapes this soil process, like microbial communities, nutrient transformation, ecosystem functions. Aims For reason, we analyzed converting from a semi‐arid steppe an irrigated system based on no‐till crop rotations impacted...
Members of the actinomycete genus Frankia form a nitrogen-fixing symbiosis with 8 different families actinorhizal plants. We report high-quality draft genome sequence for sp. strain QA3, actinobacterium isolated from root nodules Alnus nitida.