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Start Over Author "Vincent Segura" Journal forest ecology and management
2 results on '"Vincent Segura"'

1. Native-source climate determines the Douglas-fir potential of adaptation to drought

Author

Philippe Rozenberg, Hervé Cochard, Thibaud Chauvin, Vincent Segura, Biologie intégrée pour la valorisation de la diversité des arbres et de la forêt (BioForA), Institut National de la Recherche Agronomique (INRA)-Office National des Forêts (ONF), Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant (PIAF), Institut National de la Recherche Agronomique (INRA)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020]), Région Centre-Val de Loire, France, IR 'Intérêt Régional' project n° 2015-00099659 EMPIR, European Union RISE project 645654 TOPWOOD, Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de la Recherche Agronomique (INRA), and Institut National de la Recherche Agronomique (INRA)-Office national des forêts (ONF)

Subjects
0106 biological sciences, Provenance, Provenance variation, [SDV]Life Sciences [q-bio], Drought tolerance, Climate change, Hydraulic traits, Context (language use), Phenotypic plasticity, Evolutionary adaptation, Management, Monitoring, Policy and Law, 010603 evolutionary biology, 01 natural sciences, Pseudotsuga mensiesii (Mirb.) Franco, Nature and Landscape Conservation, Natural selection, Resistance (ecology), Ecology, food and beverages, Forestry, 15. Life on land, Cavitation resistance, Geography, 13. Climate action, [SDE]Environmental Sciences, Common garden, Adaptation, 010606 plant biology & botany
Abstract

International audience; Context: Douglas-fir, a fast growing conifer from western North America, recently suffered diebacks following drought in France. We investigated the link between native-source climate and provenance drought resistance in a common garden in France. We compared the adaptive potential of provenances from different parts of the natural area. Methods: We collected branches from a 25-year-old provenance trial replicated in two test sites in southern France. We estimated provenance variation of cavitation resistance traits, survival and circumference. We compared Washington-Oregon provenances to coastal and interior Californian provenances. Results: In the common gardens, the hydraulic traits were significantly variable between provenances, with a strong site x provenance interaction, and significantly related to the climate of the natural area and survival. The relationships were different between variables and test-sites. The two test-sites and their particular climatic selective pressure revealed different geographical adaptive structures in the natural area. Conclusions: Douglas-fir evolutionary adaptation to drought results from natural selection to summer climate and shapes populations for cavitation resistance. In the dryer site only, the Interior California provenances seem more drought resistant. The strong within-provenance variations suggest that there is also a certain withinprovenance adaptation potential to drought at the cost of variable mortality rates.

Published
2019
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2. Assessment of resistance to xylem cavitation in cordilleran cypress using near-infrared spectroscopy

Author

María Elena Fernández, G. Dalla-Salda, A. Martinez-Meier, Jean-Paul Charpentier, Vincent Segura, Anne-Sophie Sergent, Philippe Rozenberg, Instituto de Investigaciones Forestales y Agropecuarias Bariloche (IFAB), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Biologie intégrée pour la valorisation de la diversité des Arbres et de la Forêt (BioForA), Office national des forêts (ONF)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Diversité, Adaptation et Amélioration de la Vigne [AGAP] (DAAV), Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), National Scientific and Technological Promotion Agency of Argentina (PICT 2015-0866), European Project: 645654,H2020,H2020-MSCA-RISE-2014,TOPWOOD(2015), Office National des Forêts (ONF)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
[SDV.SA]Life Sciences [q-bio]/Agricultural sciences, 0106 biological sciences, Austrocedrus chilensis, Context (language use), Soil science, Management, Monitoring, Policy and Law, 010603 evolutionary biology, 01 natural sciences, [SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture, forestry, Hydraulic conductivity, Partial least squares regression, Nature and Landscape Conservation, biology, Resistance (ecology), NIR spectroscopy, Xylem, Forestry, Interspecific competition, 15. Life on land, Vulnerability to xylem cavitation, biology.organism_classification, Basic wood density, Cavitation, High-throughput phenotyping, Environmental science, Austrocedrus, 010606 plant biology & botany
Abstract

International audience; Characterizing drought resistance of forest trees is an important aim in the worldwide context of increasing forest decline and dieback. Furthermore, wood demand is increasing all around the world, urging the need for the domestication of native species and the selection of the most resistant individuals. While near-infrared spectroscopy is now recognized as an efficient tool to predict wood physical and chemical properties involves in wood quality, its ability to predict wood hydraulic function remains anecdotic, although it has recently gained interest. In this study, we tested near-infrared spectroscopy as a high-throughput method for quantifying both resistance to cavitation and basic wood density in the South American conifer Austrocedrus chilensis. Models were obtained in two laboratories using the same sample set. To assess resistance to cavitation, vulnerability curves were obtained using the air-injection method. Basic wood density was measured in the same samples as used for resistance to cavitation. Partial least squares regression models with cross-validation were used to establish relationships between the NIRS spectra and wood traits. The accuracy of the models strongly depended on the traits being used for calibration. Models obtained in both laboratories were similar, demonstrating the genericity of the approach whatever equipment used. Promising results were obtained for two cavitation parameters (water potential at 12% and 50% of hydraulic conductivity loss) and basic wood density. Prediction errors for these traits were low. In contrast to studies at the interspecific level, basic wood density and resistance to cavitation were negatively correlated at the intraspecific level in the studied species, but our calibration models shown than basic wood density cannot be used as a good predictor of functional traits. The NIRS has high potential to be put into practice as a rapid, reliable, and non-destructive method to determine, resistance to xylem cavitation, a trait involved in drought resistance.

Published
2020
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