Ecophysiological traits of seedlings from different accessions of Stipa tenacissima along a climatic gradient
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Título: | Ecophysiological traits of seedlings from different accessions of Stipa tenacissima along a climatic gradient |
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Autor/es: | Krichen, Khouloud | Vilagrosa, Alberto | Ben Mariem, Houcine | Chaieb, Mohamed |
Grupo/s de investigación o GITE: | Gestión de Ecosistemas y de la Biodiversidad (GEB) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ecología | Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef" |
Palabras clave: | Stipa tenacissima | Climate change | Light curve | a/ci curve | Isotopic composition | Chlorophyll fluorescence |
Fecha de publicación: | 8-mar-2024 |
Editor: | Taylor & Francis |
Cita bibliográfica: | Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology. 2024. https://doi.org/10.1080/11263504.2024.2320130 |
Resumen: | Predicting the future impact of climate change on Stipa tenacissima steppes is of paramount importance to prevent desertification. From this perspective, we selected seven populations, covering a rainfall range from 100 to 600 mm/year at the sites of seed collection, and we grew the seedlings at the same site. Gas exchange measurements of CO2, light response curves, chlorophyll content and isotopic analysis were investigated. Thala and Valencia populations displayed a contrasted gas exchange response. Both populations were subjected to A-Ci curve analysis. No significant difference was detected between these two different populations in the maximum rate of carboxylation (Vcmax) and the maximum rate of electron transport (Jmax). Stipa tenacissima exhibited a variable response in relation to different light intensities. Photosynthesis and chlorophyll fluorescence parameters proved to be significantly different among populations in response to light intensities. All populations exhibited similar chlorophyll content. The isotopic analysis highlighted a different carbon and nitrogen isotopic composition (δ13C and δ15N) and carbon content © among populations. Mesic populations presented a higher gas exchange activity and light response. The xeric populations performed a photosynthesis adjustment along with minimizing chlorophyll content. Under climate change, S. tenacissima limits productivity, which may lead to desertification. |
Patrocinador/es: | This work was partially supported by INERTIA (PID2019-111332RB-C22) and Prometeo program (EVER project) to Dr. A. Vilagrosa by the Spanish Government. CEAM is supported by the Generalitat Valencia. This research was also partially funded by the Tunisian Ministry of Higher Education and Scientific Research; Research General Direction; Excellence Project N° 21P2ES-D1P3 to laboratory LEBIOMAT |
URI: | http://hdl.handle.net/10045/142226 |
ISSN: | 1126-3504 (Print) | 1724-5575 (Online) |
DOI: | 10.1080/11263504.2024.2320130 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2024 Societá Botanica Italiana |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1080/11263504.2024.2320130 |
Aparece en las colecciones: | INV - GEB - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Krichen_etal_2024_PlantBiosyst_final.pdf | Versión final (acceso restringido) | 2,24 MB | Adobe PDF | Abrir Solicitar una copia |
Krichen_etal_2024_PlantBiosyst_revised.pdf | Embargo 12 meses (acceso abierto: 9 marzo 2025) | 1,61 MB | Adobe PDF | Abrir Solicitar una copia |
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