Search

Your search keyword '"Federico Ariel"' showing total 161 results
Start Over Author "Federico Ariel"
161 results on '"Federico Ariel"'

151. The LOB-like transcription factor Mt LBD1 controls Medicago truncatula root architecture under salt stress

Author

Martin Crespi, Federico Ariel, Anouck Diet, Raquel Lia Chan, Instituto de Agrobiotecnología del Litoral [Santa Fe] (IAL), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Universidad Nacional del Litoral [Santa Fe] (UNL), Institut des sciences du végétal (ISV), Centre National de la Recherche Scientifique (CNRS), and Le Roux, Pascale

Subjects
LBD, MESH: Sodium Chloride, Otras Ciencias Biológicas, MESH: Plant Roots, Plant Science, Root system, root architecture, Sodium Chloride, Biology, Plant Roots, lateral roots, Ciencias Biológicas, chemistry.chemical_compound, Stress, Physiological, Auxin, Medicago truncatula, Botany, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, [SDV.BV] Life Sciences [q-bio]/Vegetal Biology, MESH: Stress, Physiological, Transcription factor, Abscisic acid, MESH: Medicago truncatula, salt stress, 2. Zero hunger, chemistry.chemical_classification, Medicago, Lateral root, fungi, food and beverages, MESH: Transcription Factors, 15. Life on land, biology.organism_classification, LOB-like, Article Addendum, chemistry, CIENCIAS NATURALES Y EXACTAS, Transcription Factors, Hormone
Abstract

Lateral root (LR) formation and emergence are influenced by the environment and determines the architecture of the root system in the soil. Whereas auxins appear as the main hormone controlling LR initiation, patterning and emergence, abscisic acid (ABA) is the key hormone mediating the effect of the environment on root architecture. Hormone signaling act through transcription factors (TFs) and the Medicago truncatula LOB-like TF LBD1 was shown to be auxin-inducible but repressed by the HD-Zip I TF MtHB1 in response to salt stress and ABA during LR formation. Here, we demonstrate that the constitutive expression of Mt LBD1 in Medicago roots alters their global architecture when the plant is subjected to salt stress. Hence, LBD1 may control the final form of the root system in the soil environment. Fil: Ariel, Federico Damian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Agrobiotecnología del Litoral. Universidad Nacional del Litoral. Instituto de Agrobiotecnología del Litoral; Argentina Fil: Diet, Anouck. Centre National de la Recherche Scientifique; Francia Fil: Crespi, Martin. Centre National de la Recherche Scientifique; Francia Fil: Chan, Raquel Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Agrobiotecnología del Litoral. Universidad Nacional del Litoral. Instituto de Agrobiotecnología del Litoral; Argentina

Published
2010

152. Environmental regulation of lateral root emergence in Medicago truncatula requires the HD-Zip I transcription factor HB1

Author

Raquel Lia Chan, Anouck Diet, Martin Crespi, Florian Frugier, Marion Verdenaud, Véronique Gruber, Federico Ariel, Institut des sciences du végétal (ISV), and Centre National de la Recherche Scientifique (CNRS)

Subjects
0106 biological sciences, TILLING, MESH: Sequence Homology, Amino Acid, MESH: Plant Roots, Electrophoretic Mobility Shift Assay, AUXIN, Plant Science, MESH: Amino Acid Sequence, Plant Roots, Polymerase Chain Reaction, 01 natural sciences, purl.org/becyt/ford/1 [https], chemistry.chemical_compound, Promoter Regions, Genetic, Abscisic acid, MESH: Medicago truncatula, Research Articles, 2. Zero hunger, chemistry.chemical_classification, MESH: Chromatin Immunoprecipitation, 0303 health sciences, biology, food and beverages, MESH: Transcription Factors, Medicago truncatula, Cell biology, TRANSCRIPTION FACTORS, ABA, CIENCIAS NATURALES Y EXACTAS, Chromatin Immunoprecipitation, Otras Ciencias Biológicas, Molecular Sequence Data, Ciencias Biológicas, 03 medical and health sciences, Auxin, Botany, MESH: Promoter Regions, Genetic, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Electrophoretic mobility shift assay, Amino Acid Sequence, purl.org/becyt/ford/1.6 [https], Transcription factor, 030304 developmental biology, MESH: Molecular Sequence Data, Sequence Homology, Amino Acid, Lateral root, fungi, MESH: Polymerase Chain Reaction, Cell Biology, Meristem, biology.organism_classification, ROOT DEVELOPMENT, chemistry, MESH: Electrophoretic Mobility Shift Assay, Transcription Factors, 010606 plant biology & botany
Abstract

The adaptation of root architecture to environmental constraints is a major agricultural trait, notably in legumes, the third main crop worldwide. This root developmental plasticity depends on the formation of lateral roots (LRs) emerging from primary roots. In the model legume Medicago truncatula, the HD-Zip I transcription factor HB1 is expressed in primary and lateral root meristems and induced by salt stress. Constitutive expression of HB1 in M. truncatula roots alters their architecture, whereas hb1 TILLING mutants showed increased lateral root emergence. Electrophoretic mobility shift assay, promoter mutagenesis, and chromatin immunoprecipitation-PCR assays revealed that HB1 directly recognizes a CAATAATTG cis-element present in the promoter of a LOB-like (for Lateral Organ Boundaries) gene, LBD1, transcriptionally regulated by auxin. Expression of these genes in response to abscisic acid and auxin and their behavior in hb1 mutants revealed an HB1-mediated repression of LBD1 acting during LR emergence. M. truncatula HB1 regulates an adaptive developmental response to minimize the root surface exposed to adverse environmental stresses. Fil: Ariel, Federico Damian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Agrobiotecnología del Litoral. Universidad Nacional del Litoral. Instituto de Agrobiotecnología del Litoral; Argentina Fil: Diet, Anouck. Centre National de la Recherche Scientifique; Francia Fil: Verdenaud, Marion. Institut National de la Recherche Agronomique; Francia Fil: Gruber, Véronique. Centre National de la Recherche Scientifique; Francia Fil: Frugier, Florian. Centre National de la Recherche Scientifique; Francia Fil: Chan, Raquel Lia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Agrobiotecnología del Litoral. Universidad Nacional del Litoral. Instituto de Agrobiotecnología del Litoral; Argentina Fil: Crespi, Martín. Centre National de la Recherche Scientifique; Francia

Published
2010

154. Atmospheric opacity at 210 GHz: final results in North-West of Argentina (Puna Salteña)

Author

Bareilles, Federico Ariel, Morras, Ricardo, Olalde, Juan Carlos, Hauscarriaga, Fernando Pablo, and Arnal, Edmundo Marcelo

Subjects
Astronomía, purl.org/becyt/ford/1 [https], Ciencias Físicas, Opacidad, purl.org/becyt/ford/1.3 [https], Geofísica, Atmósfera, CIENCIAS NATURALES Y EXACTAS
Abstract

En esta contribución presentamos los resultados de la campaña de determinación de opacidades a 210 GHz en un sitio ubicado en el cordón de Macón. este sitio está ubicado a 4604 metros sobre el nivel del mar en el noroeste de la provincia de Salta. Las mediciones abarcan el periodo comprendido entre abril de 2004 y septiembre de 2007. El vapor medio registrado de la opacidad atmosférica durante el verano es de 0.35, mientras que para otoño e invierno es de 0.16. No se ven diferencias significativas en las mediciones de opacidad entre el día y la noche. comparamos nuestras mediciones con las disponibles de otros sitios (como Chajnantor y Mauna Kea) donde operan facilidades milimétricas y sub-milimétricas, In this contribution we report on the results of a monitoring campaign aim at determining the atmospheric opacity at 210 GHz of a place located in the Macon ridge. This site is located at 4604 m above sea level in the north-west argentinean province of Salta. The measurements span the period April 2004 to September 2007. The mean water vapor opacity during the summer season is 0.35, whilst during autumn and winter is 0.16. There seems to be no significative difference in opacity between daytime and night-time measurements. Our measurements are compared with opacity measurements available at other sites (e.g. Chajnantor and Mauna Kea) where millimeter and sub-millimeter facilities are operational., Instituto Argentino de Radioastronomía, Facultad de Ciencias Astronómicas y Geofísicas

Published
2007

155. La opacidad atmosférica en 210 GHz: resultados de un año de mediciones en la Puna Salteña

Author

Bareilles, Federico Ariel, Morras, Ricardo, Olalde, Juan Carlos, Hauscarriaga, Fernando Pablo, and Arnal, Edmundo Marcelo

Subjects
purl.org/becyt/ford/1 [https], Astronomía, Ciencias Físicas, purl.org/becyt/ford/1.3 [https], CIENCIAS NATURALES Y EXACTAS
Abstract

The results of one year of atmospheric opacity (AO) monitoring at 210 GHz are reported. The AO measurements are being carried out at a place located at 4600m above sea level, close to the summit of Cordillera de Macón. The place is located a few kilometers away from the town of Tolar Grande, in a region denominated Puna Salteña. This results are compared to those available from Chajnantor, where important millimetre and sub-millimetre wavelenght facilities are being installed. Se presentan resultados de un año de mediciones de la opacidad atmosférica en la frecuencia de 210 GHz. Las observaciones se realizaron en un pico de la Cordillera de Macón, a 4600 metros de altura, cercano a la localidad de Tolar Grande en la Puna Salteña. Se comparan estos resultados con los de la planicie de Chajnantor en la que se están instalando facilidades observacionales que operan en la banda milimétrica y submilimétrica del espectro. Fil: Bareilles, Federico Ariel. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina Fil: Morras, Ricardo. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina Fil: Olalde, Juan Carlos. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina Fil: Hauscarriaga, Fernando Pablo. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina Fil: Arnal, Edmundo Marcelo. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina

Published
2005

158. Teleconnections between tropical-extratropical oceans and the daily intensity of extreme rainfall over Argentina.

Author

Robledo, Federico Ariel, Penalba, Olga C., and Bettolli, María Laura

Subjects
*RAINFALL, *OCEAN-atmosphere interaction, *SOUTHERN oscillation, *ATMOSPHERIC pressure
Abstract

A Singular value decomposition (SVD) analysis was performed jointly on the daily intensity of extreme rainfall (DIER) over Argentina and the sea surface temperature (SST) of all the oceans from 17.5°N to 90°S in order to identify the large-scale variability of the SSTs related to extreme rainfall, in the period 1962-2005. The main objective of the article is to objectively recognize regions of the tropical and subtropical oceans that could be related with the extreme rainfall over Argentina. Spring is the season that is best represented by the first mode, accounting for up to 45% of the covariance between the DIER and SST. The first SVD mode of spring, summer and autumn presents a pattern of SST relating to the El Niño-Southern Oscillations (ENSO) phenomena with an enhanced DIER in different zones of centre and east of Argentina. In the second SVD mode of spring and summer, the SST patterns show cold conditions in the tropical and subtropical Atlantic and near Indonesia with an enhancement of the DIER in the centre and east of Argentina. These modes show a significant decadal variability. In the third SVD mode of spring and summer, the SST patterns present warm and cold conditions in the Indian Ocean and the centre and western Pacific Ocean (PO) with decreased rainfall in the northern and eastern portion of Argentina, respectively. This mode shows a significant period of temporal variability of around 14 years. The third mode of autumn presents warm conditions in the tropical Atlantic and the southwest PO with a low DIER in the centre and east of Argentina. This mode also presents temporal variability of around 14 years. The correlation between each mode derived from analysis of SVD and climate indices related with SST were computed. Copyright © 2012 Royal Meteorological Society [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

159. Clinical and epidemiological characteristics of patients hospitalized for SARS-CoV-2 infection in two hospitals in Córdoba.

Author

Saad EJ, Correa Barovero MA, Marucco FA, Rodríguez Bonazzi ST, Tarditi Barra A, Zlotogora M, Villada SM, Douthat Y Barrionuevo A, Heredia MC, Caeiro JP, Fernández P, and Albertini RA

Subjects
Argentina, Hospitals, Humans, COVID-19, SARS-CoV-2
Abstract

Introduction: COVID-19 disease shows a marked heterogeneity in its clinical course, with descriptions of some factors associated with a worse prognosis. Knowledge of the disease behavior in the local scenario is relevant to allow a better approach., Methods: Retrospective study in two hospitals in the city of Córdoba, Argentina, with patients aged 18 years or more, hospitalized for active SARS-CoV-2 infection, from March to October, 2020., Results: 448 patients were included, of which 95.75% corresponded to COVID-19 pneumonia. Most of the episodes occurred in men (63.6%), the median age was 63 years (IQR: 53-75), and the most frequent comorbidities were arterial hypertension (55.1%), obesity (31.7%) and diabetes mellitus (28.1%). 162 patients (36.2%) needed admission to the intensive care unit and 66 (14.7%) were placed on mechanical ventilation. 67 patients (15%) died within the first 30 days of follow-up. In the multivariate analysis, the only independent variable predictive of mortality at 30 days was age (adjusted Odds ratio [aOR] = 1.08, 95% CI = 1.04-1.11, p <0.001). The 4C-Score and CALL-Score prognostic scores showed good discrimination (Area under the curve [AUC] = 0.766, 95% CI = 0.72-0.80 and AUC = 0.785, 95% CI = 0.70-0.85 respectively) and the predicted percentages of mortality were quite close to what was observed in the present study., Conclusions: Most of the patients hospitalized with SARS-CoV-2 infection presented comorbidities and were admitted with pneumonia, associated with high mortality. The prognostic scores with the best performance to predict complications were the 4C-score and the CALL-score., (Universidad Nacional de Córdoba)

Published
2021
Full Text
View/download PDF

160. Leukoerythroblastic reaction associated with COVID-19 infection. Case report

Author

Milanesio M, Suasnabar DF, Giaj-Merlera A, Cebreros RG, and Marucco FA

Subjects
Humans, Retrospective Studies, SARS-CoV-2, COVID-19
Abstract

Introduction: COVID-19 disease is an acute viral pneumonia with multiple extrapulmonary manifestations, including certain hematological alterations. The leukoerythroblastic reaction or leukoerythroblastosis is defined by the presence in peripheral blood of nucleated erythroid cells and immature myeloids. Among its most frequent causes is medullary invasion by solid tumors and hematological neoplasms, so the recognition and consequent study of this reaction is extremely important. To date, only a single case of COVID-19 disease associated with a leukoerythroblastic reaction has been reported worldwide in adult patients., Methodology: In the following manuscript we describe the presence of leukoerythroblastosis in a male hospitalized for COVID-19, in which multiple causes were ruled out., Results: The patient had resolution of the leukoerythroblatosis as his respiratory symptoms resolved., Conclusion: The COVID-19 disease could be a new known cause of a leukoerythroblastic reaction, although we believe that a greater number of reported cases is necessary to affirm that the association was not random., (Universidad Nacional de Córdoba)

Published
2021
Full Text
View/download PDF

161. [Health technology assessment for decision-making in Latin America: good practice principles].

Author

Pichon-Riviere A, Soto NC, Augustovski FA, García Martí S, and Sampietro-Colom L

Abstract

Objective: Identify the most relevant, applicable, and priority good practice principles in health technology assessment (HTA) in Latin America, and potential barriers to implementing them in the region., Methods: HTA good practice principles postulated worldwide were identified and then explored through a deliberative process in a forum of evaluators, funders, and technology producers., Results: Forty-two representatives from ten Latin American countries participated in the forum. The good practice principles postulated at the international level were considered valid and potentially applicable in Latin America. Five principles were identified as priorities and as having greater potential to be expanded at this time: transparency in carrying out HTA; involvement of stakeholders in the HTA process; existence of mechanisms to appeal decisions; existence of clear mechanisms for HTA priority-setting; and existence of a clear link between assessment and decision-making. The main challenge identified was to find a balance between application of these principles and available resources, to prevent the planned improvements from jeopardizing report production times and failing to meet decision-makers' needs., Conclusions: The main recommendation was to gradually advance in improving HTA and its link to decision-making by developing appropriate processes for each country, without attempting to impose, in the short term, standards taken from examples at the international level without adequate adaptation to the local context.

Published
2018

Catalog

Books, media, physical & digital resources
See catalog results