Germination response to water availability in populations of Festuca pallescens along a Patagonian rainfall gradient based on hydrotime model parameters
| Autor: | Dardo Ruben Lopez, Diego Batlla, María Verónica Arana, Aldana Soledad López, Paula Marchelli |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Festuca
0106 biological sciences Feed Grasses Physiology Science Región Patagónica Population Pastizal Natural Biology ECOLOGY 010603 evolutionary biology 01 natural sciences Grassland Article Gradiente de Lluvias SUSTAINABILITY Gramíneas Forrajeras WATER STRESS Precipitation ADAPTATION PHYSIOLOGY education education.field_of_study geography Multidisciplinary geography.geographical_feature_category Ecology Pastures Cline (biology) Festuca pallescens biology.organism_classification Pastizales Arid PLANT SCIENCES GENETIC-ECOLOGICAL Agronomy Hydric soil Germination purl.org/becyt/ford/4.1 [https] Natural Pastures Medicine Plant sciences purl.org/becyt/ford/4 [https] 010606 plant biology & botany |
| Zdroj: | Scientific Reports Vol.11 art.10653,11p. FAUBA Digital (UBA-FAUBA) Universidad de Buenos Aires. Facultad de Agronomía instacron:UBA-FAUBA CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET Scientific Reports, Vol 11, Iss 1, Pp 1-11 (2021) Scientific Reports 11 : Art.: 10653 (May 2021) INTA Digital (INTA) Instituto Nacional de Tecnología Agropecuaria instacron:INTA |
| ISSN: | 2045-2322 |
| Popis: | López, Aldana Soledad. 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, 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. Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Córdoba. Estación Experimental Agropecuaria Manfredi (EEA Manfredi). Agencia De Extensión Rural Villa Dolores. Córdoba, Argentina. Arana, María Verónica. 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. Arana, María Verónica. 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. Batlla, Diego. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cerealicultura. Buenos Aires, Argentina. Marchelli, Paula. 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. Marchelli, Paula. 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. 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. \nBy 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. grafs., tbls. |
| Databáze: | OpenAIRE |
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