Germination response to water availability in populations of Festuca pallescens along a Patagonian rainfall gradient based on hydrotime model parameters

Sensitivity to water availability is a key physiological trait for grassland species located in arid and semiarid environments, where successful germination is closely related to rainfall dynamics. Festuca pallescens inhabits diverse environments along a steep precipitation gradient in North Pata...

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Otros Autores: López, Aldana Soledad (CONICET - Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Patagonia Norte. Estación Experimental Agropecuaria Bariloche (EEA Bariloche). Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB). Bariloche, Río Negro, Argentina.), López, Dardo Rubén, Arana, María Verónica, Batlla, Diego, Marchelli, Paula
Formato: Artículo
Lenguaje:Inglés
Materias:
Acceso en línea:http://ri.agro.uba.ar/files/download/articulo/2021lopez.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
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024 |a 10.1038/s41598-021-89901-1 
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245 1 |a Germination response to water availability in populations of Festuca pallescens along a Patagonian rainfall gradient based on hydrotime model parameters 
520 |a Sensitivity to water availability is a key physiological trait for grassland species located in arid and semiarid environments, where successful germination is closely related to rainfall dynamics. Festuca pallescens inhabits diverse environments along a steep precipitation gradient in North Patagonia, thus ofering a suitable model for the study of germination behavior in response to water availability. By analyzing germination in nine populations using a hydrotime model approach, we aimed to fnd within-species variation. Seed population behavior was analyzed under diferent hydric conditions using hydrotime model parameters (hydrotime, mean base water potential and its standard deviation). We estimated the mean base water potential for F. pallescens (micro b(50) = − 2.79 ± 0.45 MPa), which did not difer signifcantly between populations. However, the hydrotime parameter (θH) varied markedly, suggesting physiological adaptation to local environments. Higher values of H were found in populations located at the extremes of the distribution gradient, indicating that germination may be prevented or delayed in conditions that are suboptimal for the species. Since the variation in hydrotime model parameters did not follow a cline, micro-environmental cues may have the greatest infuence on the physiological behavior of the species, rather than the macroscale rainfall gradient. 
650 |2 Agrovoc  |9 26 
653 |a ECOLOGY 
653 |a PHYSIOLOGY 
653 |a PLANT SCIENCES 
700 1 |a López, Aldana Soledad  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Patagonia Norte. Estación Experimental Agropecuaria Bariloche (EEA Bariloche). Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB). Bariloche, Río Negro, Argentina.  |e CONICET - Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Patagonia Norte. Estación Experimental Agropecuaria Bariloche (EEA Bariloche). Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB). Bariloche, Río Negro, Argentina.  |9 68831 
700 1 |a López, Dardo Rubén  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Córdoba. Estación Experimental Agropecuaria Manfredi (EEA Manfredi). Agencia De Extensión Rural Villa Dolores. Córdoba, Argentina.  |9 68832 
700 1 |a Arana, María Verónica  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Patagonia Norte. Estación Experimental Agropecuaria Bariloche (EEA Bariloche). Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB). Bariloche, Río Negro, Argentina.  |u CONICET - Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Patagonia Norte. Estación Experimental Agropecuaria Bariloche (EEA Bariloche). Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB). Bariloche, Río Negro, Argentina.  |9 67243 
700 1 |a Batlla, Diego  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cerealicultura. Buenos Aires, Argentina.  |9 11303 
700 1 |a Marchelli, Paula  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Patagonia Norte. Estación Experimental Agropecuaria Bariloche (EEA Bariloche). Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB). Bariloche, Río Negro, Argentina.  |u CONICET - Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Patagonia Norte. Estación Experimental Agropecuaria Bariloche (EEA Bariloche). Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB). Bariloche, Río Negro, Argentina.  |9 41108 
773 |t Scientific Reports  |g Vol.11 (2021), art.10653, 11 p., grafs., tbls. 
856 |f 2021lopez  |i en internet  |q application/pdf  |u http://ri.agro.uba.ar/files/download/articulo/2021lopez.pdf  |x ARTI202206 
856 |u https://www.nature.com  |z LINK AL EDITOR 
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