25 results on '"Casas, Cecilia"'
Search Results
2. From plant litter to soil organic matter: a game to understand carbon dynamics.
- Author
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Piazza, Maria‐Victoria, Pinto, Priscila, Bazzoni, Bruno, Berenstecher, Paula, Casas, Cecilia, Zieher, Ximena López, Mallerman, Julieta, Méndez, M Soledad, Omacini, Marina, Piñeiro, Gervasio, Semmartin, María, Vivanco, Lucía, and Yahdjian, Laura
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PLANT litter ,PLANT-soil relationships ,ORGANIC compounds ,SOIL leaching ,SOIL respiration - Abstract
Managing ecosystems to sequester soil carbon requires a thorough understanding of complex soil processes. Here, we integrate these soil processes through the metaphor of a game—one that moves through multiple dimensions (from macro‐aggregates to micropores and clay particles) and scales (from centimeters to nanometers) of the soil. The rules of the game are based on current understanding of soil carbon persistence, which differs from the classic humus concept of molecular complexity. The game's objective is to win points, by keeping "tokens" (plant‐derived organic compounds) within the soil organic matter for as long as possible. The game begins when tokens enter different "pool‐levels" (plant litter, particulate organic matter, dissolved organic matter, and mineral‐associated organic matter) of the soil, either directly or after metabolic transformation by soil biota. Points are lost through either respiration by soil biota or leaching. We invite readers to play this game and explore different natural ecosystems and land‐use scenarios to better comprehend complex soil processes. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Estrategias actuales para potenciar el turismo y la educación
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Sanz, Carmen, primary and Casas, Cecilia, additional
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- 2021
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4. Guadua chacoensis BAMBOO BIOCHAR (POACEAE, BAMBUSEAE) AFFECTED HORTICULTURAL SPECIES IN A SALINE-ALKALINE SOIL.
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Milone, Julieta, Casas, Cecilia, and Susana Vega, Andrea
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BIOCHAR , *SOIL amendments , *ACID soils , *HORTICULTURAL crops , *GERMINATION , *SALINITY , *PLANT growth , *RADISHES - Abstract
Biochar is being used with increasing frequency as a soil remediator. However, its impact depends on soil limitations, biochar source and concentration applied. We studied Guadua chacoensis bamboo biochar as a saline-alkaline soil amendment. Aqueous solutions with 0, 2.5 and 5% of bamboo biochar (BC) were used to determine their influence on seed germination rate and radicle length in two horticultural species moderately tolerant to salinity and alkalinity: arugula (Eruca sativa) and radish (Raphanus sativus). Also, we amended a saline-alkaline soil with 0, 0.5 and 2.5% of BC to evaluate its effect on plant height, leaf and root biomass of both horticultural crops. The application of 2.5 and 5% BC solution decreased arugula germination in 3.14% and 5.2%, respectively, compared to 0% BC. The addition of BC decreased radicle length in both species and such reduction was more significant with the higher BC concentration. The addition of 0.5% and 2.5% BC as amendment in a saline-alkaline soil decreased arugula height in 27.32% and 50.33%, respectively, compared to 0% BC, resulting in smaller plants with less leaf and root biomass. The BC amendment did not affect leaf biomass, but 2.5% BC reduced root biomass in 53.85% compared to 0% BC. These results seem to be influenced not only by the BC inherent characteristics but also by the increase in soil pH, caused by the addition of biochar. Further studies may evaluate the impact of BC addition with different properties on saline-alkaline soils, and its use as an amendment in the remediation of acid soils. [ABSTRACT FROM AUTHOR]
- Published
- 2023
5. What happens next? Legacy effects induced by grazing and grass-endophyte symbiosis on thistle plants and their floral visitors
- Author
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Casas, Cecilia, Torretta, Juan Pablo, Exeler, Nina, and Omacini, Marina
- Published
- 2016
6. Modeling potential site productivity for Austrocedrus chilensis trees in northern Patagonia (Argentina)
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Oddi, Facundo J., primary, Casas, Cecilia, additional, Goldenberg, Matías G., additional, Langlois, Juan P., additional, Landesmann, Jennifer B., additional, Gowda, Juan H., additional, Kitzberger, Thomas, additional, and Garibaldi, Lucas A., additional
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- 2022
- Full Text
- View/download PDF
7. Uso de micofenolato mofetilo fuera de registro en enfermedades inmunomediadas
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Danza, Alvaro, primary, Graña, Diego, additional, Casas, Cecilia, additional, Domínguez, Viviana, additional, and Rebella, Martín, additional
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- 2022
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8. The enhancement of invasion ability of an annual grass by its fungal endophyte depends on recipient community structure
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Casas, Cecilia, Gundel, Pedro E., Semmartin, María, Schnyder, Hans, and Omacini, Marina
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- 2016
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9. Impact of native spray‐dried lactic acid bacteria, packing density and wilting time on fermentation characteristics of experimental maize and lucerne silages
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Blajman, Jesica E., primary, Signorini, Marcelo L., additional, Vinderola, Gabriel, additional, Lingua, Mariana S., additional, Romero, Luis A., additional, Páez, Roxana B., additional, Casas, Cecilia I., additional, Bergamini, Carina V., additional, Giménez, Paula, additional, and Gaggiotti, Mónica C., additional
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- 2022
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10. Mite density, not diversity, declines with biomass removal in Patagonian woodlands
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Fernández, Margarita M., primary, Casas, Cecilia, additional, Bedano, José C., additional, Eissenstat, David M., additional, Kaye, Margot W., additional, García, Ivana M., additional, Kun, Marcelo E., additional, and Garibaldi, Lucas A., additional
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- 2022
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11. Loss of fungal symbionts at the arid limit of the distribution range in a native Patagonian grass—Resource eco‐physiological relations
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Casas, Cecilia, primary, Gundel, Pedro E., additional, Deliens, Eluney, additional, Iannone, Leopoldo J., additional, García Martinez, Guillermo, additional, Vignale, María V., additional, and Schnyder, Hans, additional
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- 2021
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12. A fungal endophyte of an annual weed reduces host competitive ability and confers associational protection to wheat
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García-Parisi, Pablo Adrián, primary, Gavilán, Sebastián Aníbal, additional, Casas, Cecilia, additional, Gundel, Pedro Emilio, additional, and Omacini, Marina, additional
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- 2021
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13. Loss of fungal symbionts at the arid limit of the distribution range in a native Patagonian grass—Resource eco‐physiological relations.
- Author
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Casas, Cecilia, Gundel, Pedro E., Deliens, Eluney, Iannone, Leopoldo J., García Martinez, Guillermo, Vignale, María V., and Schnyder, Hans
- Subjects
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PLANT ecology , *VESICULAR-arbuscular mycorrhizas , *WATER efficiency , *PLANT colonization , *HOST plants , *SYMBIODINIUM - Abstract
Crucial to our understanding of plant ecology is the consideration of the eco‐physiological responses and constraints of plant–fungal symbioses throughout the native distribution range of their host.We examined key eco‐physiological roles of two co‐occurring fungal symbionts [Epichloë endophytes and arbuscular mycorrhizal fungi (AMF)] in the endemic grass Hordeum comosum across a wide bioclimatic gradient and contrasting grazing severity. We sampled H. comosum plants along four humid‐to‐arid transects in Patagonia, Argentina, covering its entire distribution range and determined Epichloë presence, AMF root colonization, nitrogen and phosphorus concentration, intrinsic water‐use efficiency (iWUE, the ratio of photosynthesis to stomatal conductance) and 18O‐enrichment of cellulose in shoots.Root colonization by AMF increased with Epichloë presence. All plants hosted Epichloë in the humid range of the gradient, but symbioses occurrence decreased towards arid sites which also displayed severe grazing symptoms at site level.Symbiosis with Epichloë correlated positively with shoot nitrogen concentration in the centre of the distribution range, and with shoot phosphorus concentration across the entire distribution range.The site‐level relationship of AMF colonization with 18O‐enrichment and iWUE suggested that mycorrhiza boosted stomatal conductance in humid environments but curbed it in arid environments.While the interpretation of interactions and potential causalities from observational studies should be done with caution, this study demonstrates distinct correlations between plant–fungal symbiont associations and key resource parameters (phosphorus, nitrogen and iWUE vs. 18O‐enrichment). Such correlations may suggest particular functional roles for these symbionts in the ecology of their host plant. A free Plain Language Summary can be found within the Supporting Information of this article. [ABSTRACT FROM AUTHOR]
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- 2022
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14. A highly productive grass improves chemical and biological properties but does not aggregate stability in saline-sodic lowlands in Argentina
- Author
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Casas, Cecilia, primary, Di Bella, Carla E., additional, Lattanzi, Fernando A., additional, Schwab, Magalí, additional, Clavijo, Pilar, additional, Schäufele, Rudi, additional, Druille, Magdalena, additional, and Grimoldi, Agustín A., additional
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- 2019
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15. The role of plant size in the selection of glyphosate resistance in Sorghum halepense
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Vila Aiub, Martin Miguel, Casas, Cecilia, and Gundel, Pedro Emilio
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FITNESS ,CIENCIAS AGRÍCOLAS ,PERENNIAL SPECIES ,RESISTANCE TRAIT ,Otras Ciencias Agrícolas ,AGROECOSYSTEM - Abstract
BACKGROUND: The effect of plant size (seedlings versus young plants versus adult plants) on the phenotypic level of glyphosate resistance and selection intensity (SI) in Sorghum halepense with and without a reduced glyphosate translocation resistance mechanism was evaluated. RESULTS: Resistance parameters [the 50% lethal dose (LD50) and the dose required to cause a 50% reduction in plant growth (GR50)] in adult plants were notably higher than in seedlings regardless of the resistance status. However, under similar plant size increases, populations comprised of glyphosate-resistant (R) individuals showed higher survival and growth when glyphosate treated compared with glyphosate-susceptible (S) plants. An increase in SI was always evident with increasing glyphosate doses. However, the rate of increase in SI was higher under glyphosate selection of young R and S plants, followed by seedlings and adult R and S plants. However, in conditions of R seedlings coexisting with adult S plants under glyphosate treatment (1000–4000 g ha−1), selection against glyphosate resistance was observed. CONCLUSION: Any increase in size from the seedling stage of R plants translates into an amplification of resistance. Depending on the particular size combinations of spatially coexisting R and S plants, selection for glyphosate resistance may be faster, slower or even not evident. Fil: Vila Aiub, Martin Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. University of Western Australia; Australia Fil: Casas, Cecilia. Universitat Technical Zu Munich; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Recursos Naturales y Ambiente. Cátedra de Edafología; Argentina Fil: Gundel, Pedro Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina
- Published
- 2018
16. Efecto de la tasa de descuento sobre la priorización de alternativas de manejo del matorral Norpatagónico argentino
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Goldenberg, Matías G, Gowda, Juan H, Casas, Cecilia, and Garibaldi, Lucas A
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rentabilidad forestal ,silviculture ,forest profitability ,toma de decisiones ,silvicultura ,decision making - Abstract
The management of native forests in Northern Patagonia has great potential to provide multiple products with high market value, whoseregional demand is growing continuously. Considering that economic profitability is key to guide sustainable forest managementdecisions, in this paper the effect of the discounting rate, which is a measure of the opportunity cost of funds and resources used in aproject, was evaluated over the profitability of forest management options. Five management alternatives of native mixed shrublandsthrough variable discount rates were analyzed. The costs and revenues were obtained from a woodshed experiment extraction inEl Foyel, Río Negro (41°38’48.44” S; 71°29’59.06” O), consultation and local publications. It was found that with lower discountrates to 2.9 % the most attractive management alternative was the management that combined woodshed extractions and afforestationof Austrocedrus chilensis while at a higher discount rate, the most attractive alternative was the woodshed shrub management withintensive extraction. There was no rate that positioned the alternative replacement of the shrubland for afforestation of Pinus ponderosaas the best alternative. This work suggests that there are management alternatives of native forest that would be more profitable thanthat for single species forest plantations of P. ponderosa., El manejo de bosques nativos en el norte de la Patagonia argentina tiene un gran potencial para proveer múltiples productos con altovalor de mercado, cuya demanda regional crece de forma continua. Considerando que el retorno económico es clave para orientar lasdecisiones de manejo forestal sustentable, en este trabajo se evaluó el efecto de la tasa de descuento, que es una medida del costo deoportunidad de los fondos y recursos que se utilizan en un proyecto, sobre distintas opciones de manejo del matorral. Se compararoncinco alternativas de manejo del matorral mixto nativo a lo largo de un gradiente de tasas de descuento. Los costos e ingresosfueron relevados a partir de un experimento de extracción leñera en el paraje El Foyel, Río Negro (41°38‘48,44“S; 71°29‘59,06“O),consultas a expertos y publicaciones locales. Se determinó que con tasas menores a 2,9 % fue más conveniente un manejo mixtoleña - Austrocedrus chilensis en tanto que, a tasas mayores, la alternativa más atractiva fue el manejo leñero del matorral con máximaintensidad de extracción. Ninguna de las tasas exploradas posicionó al remplazo del matorral por forestación de Pinus ponderosacomo la alternativa más atractiva. Este trabajo sugiere que existen alternativas de manejo del matorral Norpatagónico que serían másatractivas que su remplazo por forestaciones monoespecíficas con P. ponderosa.
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- 2018
17. A highly productive grass improves chemical and biological properties but does not aggregate stability in saline-sodic lowlands in Argentina.
- Author
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Casas, Cecilia, Di Bella, Carla E., Lattanzi, Fernando A., Schwab, Magalí, Clavijo, Pilar, Schäufele, Rudi, Druille, Magdalena, and Grimoldi, Agustín A.
- Subjects
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CHEMICAL properties , *HALOPHYTES , *CATTLE breeding , *SOIL remediation , *PANICUM , *SOIL degradation , *SODIC soils , *SOIL salinity - Abstract
Remediation of saline-sodic soils used for cattle breeding is particularly challenging due to the limited alternatives. We hypothesize that introducing salt tolerant and productive forage in a lowland halophytic steppe, typical of saline-sodic soils, increases belowground biomass inputs and activity, generating a series of positive effects on soil biological and chemical properties, and aggregate stability – an accepted indicator of soil degradation resistance. Under natural environmental conditions, we found that the introduction of Panicum coloratum (panicum) increased belowground biomass almost three times, the abundance of mites tended to be greater and that of springtails was 9.4 kg−1 contrasting with none found in the halophytic steppe, after 7 years. The concentration of Ca2+ and Mg2+ increased 26% and 54%, respectively, and that of Na+ was reduced 31% compared with the halophytic steppe. Soil pH decrease 5% and electrical conductivity decreased 37% (changing from moderate to very slightly saline) in panicum compared to the halophytic steppe. However, in panicum, mineral-associated organic matter (MAOM) and aggregate stability decreased 22% and 26%, respectively. We concluded that, although biological and chemical properties improved, aggregate stability – an early indicator of soil recovery – decreased, which was likely determined by MAOM reduction in saline-sodic soils. [ABSTRACT FROM AUTHOR]
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- 2020
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18. The role of plant size in the selection of glyphosate resistance inSorghum halepense
- Author
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Vila-Aiub, Martin, primary, Casas, Cecilia, additional, and Gundel, Pedro E, additional
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- 2018
- Full Text
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19. Silvicultura del ciprés de la cordillera: ¿una alternativa rentable y sustentable para la provincia de Río Negro?
- Author
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Garibaldi, Lucas Alejandro, Casas, Cecilia, Goldenberg, Matı́as, Gowda, Juan, Heinemann, Karin, Kitzberger, Thomas, Landesmann, Jennifer, Langlois, Juan P., and Mayoral, Lucía
- Subjects
Sustentabilidad Ecológica ,Austrocedrus chilensis ,Especie Ingeniera - Abstract
Fil: Garibaldi, Lucas Alejandro. Universidad Nacional de Río Negro. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Fil: Garibaldi, Lucas Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Fil: Casas, Cecilia. Universidad Nacional de Río Negro. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Fil: Casas, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Fil: Casas, Cecilia. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Fil: Goldenberg, Matías. Universidad Nacional de Río Negro. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Fil: Goldenberg, Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Fil: Gowda, Juan. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Gowda, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Heinemann, Karin. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Heinemann, Karin. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Kitzberger, Thomas. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Kitzberger, Thomas. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Landesmann, Jennifer. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Landesmann, Jennifer. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina. Fil: Langlois, Juan P. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Fil: Mayoral, Lucía. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. El ciprés de la cordillera (Austrocedrus chilensis) es una especie arbórea autóctona de la Patagonia Andina. Debido a su calidad maderera, el valor de mercado en los últimos 15 años ha sido cuatro veces más alto que el de coníferas exóticas implantadas en la región. Sin embargo, gran parte de los sitios habitados (o habitables) por el ciprés han sido forestados (o son factibles de serlo) con coníferas exóticas que, a su vez, aumentan de manera importante el riesgo, severidad y extensión de incendios. Al ser una especie nativa formadora de hábitat (especie “ingeniera”), la plantación y el manejo del ciprés en estos sitios resultarían una alternativa de mayor sustentabilidad ecológica que la implantación de coníferas exóticas. Sin embargo, es aún incierta la rentabilidad para el productor de esta actividad. La regeneración del ciprés se encuentra limitada tanto por la disponibilidad natural de propágulos como por la falta de técnicas y manejos adecuados. La sequía y la ocurrencia de fuegos, naturales o de origen antrópico durante los períodos pré y post-colonización europea han causado la fragmentación de los bosques de ciprés. En consecuencia, algunos bosquetes de ciprés quedaron delimitados sobre afloramientos rocosos que no fueron alcanzados por fuego. Las áreas abiertas incendiadas, fueron usadas para la cría extensiva de ganado (ovino, caprino, vacuno) que, junto con otros herbívoros introducidos (liebre, ciervo) contribuyeron al impacto negativo sobre la regeneración de estos bosques. Revertir esta situación requiere del desarrollo de métodos de plantación y de una mayor difusión de los conocimientos actuales a los productores. Además, es necesario determinar métodos adecuados a implementar (por ejemplo, raleos, métodos y turnos de corta) para el desarrollo de rodales productivos en aquellos sitios donde la regeneración del ciprés es abundante. Cuando la regeneración del ciprés es abundante, la especie puede formar grupos con densidades superiores a las 30.000 plantas por ha. Debido a su alta tolerancia a la sombra, el proceso de auto-raleo de la especie puede prolongarse durante décadas, reduciendo el valor productivo del rodal. Por lo tanto, propusimos evaluar el costo de liberación de ciprés en etapa de renoval (3-4 m de altura dominante) y su reacción temprana en crecimiento durante los tres años de duración del proyecto (dos temporadas de crecimiento) en situaciones que reflejen las condiciones naturales de regeneración de la especie.
- Published
- 2016
20. No escape? Costs and benefits of leaf de-submergence in the pasture grass Chloris gayana under different flooding regimes
- Author
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Striker, Gustavo G., primary, Casas, Cecilia, additional, Kuang, Xiaolin, additional, and Grimoldi, Agustín A., additional
- Published
- 2017
- Full Text
- View/download PDF
21. The role of plant size in the selection of glyphosate resistance in Sorghum halepense.
- Author
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Gundel, Pedro E, Vila‐Aiub, Martin, and Casas, Cecilia
- Subjects
JOHNSON grass ,GLYPHOSATE ,HERBICIDE resistance ,AGRICULTURAL ecology ,WEED populations - Abstract
BACKGROUND: The effect of plant size (seedlings versus young plants versus adult plants) on the phenotypic level of glyphosate resistance and selection intensity (SI) in Sorghum halepense with and without a reduced glyphosate translocation resistance mechanism was evaluated. RESULTS: Resistance parameters [the 50% lethal dose (LD50) and the dose required to cause a 50% reduction in plant growth (GR50)] in adult plants were notably higher than in seedlings regardless of the resistance status. However, under similar plant size increases, populations comprised of glyphosate‐resistant (R) individuals showed higher survival and growth when glyphosate treated compared with glyphosate‐susceptible (S) plants. An increase in SI was always evident with increasing glyphosate doses. However, the rate of increase in SI was higher under glyphosate selection of young R and S plants, followed by seedlings and adult R and S plants. However, in conditions of R seedlings coexisting with adult S plants under glyphosate treatment (1000–4000 g ha−1), selection against glyphosate resistance was observed. CONCLUSION: Any increase in size from the seedling stage of R plants translates into an amplification of resistance. Depending on the particular size combinations of spatially coexisting R and S plants, selection for glyphosate resistance may be faster, slower or even not evident. © 2018 Society of Chemical Industry Depending on the particular size combination of spatially coexisting glyphosate‐resistant (R) and susceptible (S) plants, the intensity of glyphosate selection may increase or decrease under increasing glyphosate doses. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
22. What happens next? Legacy effects induced by grazing and grass-endophyte symbiosis on thistle plants and their floral visitors
- Author
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Casas, Cecilia, primary, Torretta, Juan Pablo, additional, Exeler, Nina, additional, and Omacini, Marina, additional
- Published
- 2015
- Full Text
- View/download PDF
23. Phenomic networks reveal largely independent root and shoot adjustment in waterlogged plants of L otus japonicus.
- Author
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STRIKER, GUSTAVO G., CASAS, CECILIA, MANZUR, MILENA E., PLOSCHUK, ROCÍO A., and CASAL, JORGE J.
- Subjects
- *
PLANT root morphology , *PLANT shoots , *WATERLOGGING (Soils) , *LOTUS japonicus , *EFFECT of stress on plants , *LEAF physiology , *PLANT growth - Abstract
Waterlogging imposes severe stress to the plant, and the interplay between root and aerial organs in the adjustment to this stress is poorly understood. A set of recombinant inbred lines ( RILs) of L otus japonicus ( Gifu B-129 × Miyakojima MG-20) was subjected to control and waterlogging conditions for 21 d, and 12 traits related to leaf physiological functioning, root aerenchyma formation, shoot and root morphology, and dry mass accumulation were assessed to generate phenomic networks. The phenomic network became more complex under waterlogging as a result of the incorporation of root aerenchyma and dark-adapted Fv/ Fm. Significant waterlogging-induced variation was found for stomatal conductance, dark-adapted Fv/ Fm and aerenchyma. The RILs with stronger induction of aerenchyma in response to waterlogging tended to show reduced negative impact of this stress on root growth but suffered average impact on shoot growth. The RILs that retained higher stomatal conductance under waterlogging tended to retain higher dark-adapted Fv/ Fm and shoot growth under waterlogging conditions but showed average impact on root traits. We propose a model where, although the stress experienced by the roots during waterlogging is transmitted to the shoot, shoots and roots deal with waterlogging in a less interdependent manner than often assumed. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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24. [Off-label use of mycophenolate mofetil in immune-mediated diseases].
- Author
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Danza A, Graña D, Casas C, Domínguez V, and Rebella M
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- Female, Humans, Male, Glucocorticoids therapeutic use, Retrospective Studies, Off-Label Use, Immunosuppressive Agents adverse effects, Treatment Outcome, Mycophenolic Acid adverse effects, Drug-Related Side Effects and Adverse Reactions
- Abstract
Background: Mycophenolate mofetil (MMF) is a largely used immunosuppressive agent in the prevention of transplant rejection and lupus nephritis. Its use has been extended to other immune-mediated diseases (ID)., Aim: To assess the off-label use of MMF, its performance as a glucocorticoid sparing agent, the therapeutic response, and its adverse effects., Material and Methods: A retrospective study was performed. One hundred-seven patients aged 58 ± 16 years (83% females) who received MMF for ID in off label uses between 2016 and 2018 were included. The study variables were cause of MMF indication, sex, age, use as a first- or second-line treatment and maintenance dosing. The cumulative doses of glucocorticoids six months before and after MMF indication were compared., Results: MMF was used as a second-line therapy in 66 patients (62%). The mean maintenance dose of MMF was 1,500 ± 540 mg/day. Prednisone cumulative doses were 3,908 ± 2,173 and 1,672 ± 1,083 milligrams six months before and six months after starting MMF, respectively (p < 0.01). Adverse effects were identified in 21 (20%) cases, none of them serious., Conclusions: Mycophenolate has a favorable response profile as a second line immunosuppressive agent. It is effective as a glucocorticoid sparing drug. The safety profile is also favorable as adverse effects were scanty and mild.
- Published
- 2022
- Full Text
- View/download PDF
25. The role of plant size in the selection of glyphosate resistance in Sorghum halepense.
- Author
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Vila-Aiub M, Casas C, and Gundel PE
- Subjects
- Glycine pharmacology, Longevity drug effects, Seedlings drug effects, Seedlings genetics, Seedlings growth & development, Sorghum genetics, Sorghum growth & development, Glyphosate, Glycine analogs & derivatives, Herbicide Resistance genetics, Herbicides pharmacology, Sorghum drug effects
- Abstract
Background: The effect of plant size (seedlings versus young plants versus adult plants) on the phenotypic level of glyphosate resistance and selection intensity (SI) in Sorghum halepense with and without a reduced glyphosate translocation resistance mechanism was evaluated., Results: Resistance parameters [the 50% lethal dose (LD
50 ) and the dose required to cause a 50% reduction in plant growth (GR50 )] in adult plants were notably higher than in seedlings regardless of the resistance status. However, under similar plant size increases, populations comprised of glyphosate-resistant (R) individuals showed higher survival and growth when glyphosate treated compared with glyphosate-susceptible (S) plants. An increase in SI was always evident with increasing glyphosate doses. However, the rate of increase in SI was higher under glyphosate selection of young R and S plants, followed by seedlings and adult R and S plants. However, in conditions of R seedlings coexisting with adult S plants under glyphosate treatment (1000-4000 g ha-1 ), selection against glyphosate resistance was observed., Conclusion: Any increase in size from the seedling stage of R plants translates into an amplification of resistance. Depending on the particular size combinations of spatially coexisting R and S plants, selection for glyphosate resistance may be faster, slower or even not evident. © 2018 Society of Chemical Industry., (© 2018 Society of Chemical Industry.)- Published
- 2018
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