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Ajouter le résultat dans votre panierOrigin of the invasive Arundo donax (Poaceae) : a trans-Asian expedition in herbaria / Laurent Hardion in Annals of Botany, 114 (2014)
Titre : Origin of the invasive Arundo donax (Poaceae) : a trans-Asian expedition in herbaria Type de document : Électronique Auteurs : Laurent Hardion ; Régine Verlaque ; Kristin Saltonstall ; Agathe Leriche ; Bruno Vila Année de publication : 2014 Article en page(s) : 1-8 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Domestication des plantes
[CBNPMP-Thématique] Phylogénie (liens existant entre espèces apparentées)
[CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantesMots-clés : Arundo donax L., 1753 Résumé : Background and Aims : The hypothesis of an ancient introduction, i.e. archaeophyte origin, is one of the most challenging questions in phylogeography. Arundo donax (Poaceae) is currently considered to be one of the worst invasive species globally, but it has also been widely utilzed by man across Eurasia for millennia. Despite a lack of phylogenetic data, recent literature has often speculated on its introduction to the Mediterranean region. Methods : This study tests the hypothesis of its ancient introduction from Asia to the Mediterranean by using plastid DNA sequencing and morphometric analysis on 127 herbarium specimens collected across sub-tropical Eurasia. In addition, a bioclimatic species distribution model calibrated on 1221 Mediterranean localities was used to identify similar ecological niches in Asia. Key Results : Despite analysis of several plastid DNA hypervariable sites and the identification of 13 haplotypes, A. donax was represented by a single haplotype from the Mediterranean to the Middle East. This haplotype is shared with invasive samples worldwide, and its nearest phylogenetic relatives are located in the Middle East. Morphometric data characterized this invasive clone by a robust morphotype distinguishable from all other Asian samples. The ecological niche modelling designated the southern Caspian Sea, southern Iran and the Indus Valley as the most suitable regions of origin in Asia for the invasive clone of A. donax. Conclusions : Using an integrative approach, an ancient dispersion of this robust, polyploid and non-fruiting clone is hypothesized from the Middle East to the west, leading to its invasion throughout the Mediterranean Basin. Lien pérenne : DOI : 10.1093/aob/mcu143 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=143217
in Annals of Botany > 114 (2014) . - 1-8Hardion, Laurent, Verlaque, Régine, Saltonstall, Kristin, Leriche, Agathe, Vila, Bruno 2014 Origin of the invasive Arundo donax (Poaceae) : a trans-Asian expedition in herbaria. Annals of Botany, 114: 1-8.Documents numériques
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Titre : Contribution of above- and below-ground plant traits to the structure and function of grassland soil microbial communities Type de document : Imprimé Auteurs : Nicolas Legay ; Catherine Baxendale ; Karl Grigulis ; Ute krainer ; Eva Kastl ; Michael Schloter ; Richard D. Bardgett ; Cindy Arnoldi ; Michael Bahn ; Maxime Dumont ; Franck Poly ; Jean-Christophe Clément ; Sandra Lavorel (1965-) Année de publication : 2014 Article en page(s) : 1011-1021 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Prairies humides et hautes communautés herbeuses
[CBNPMP-Thématique] RevégétalisationRésumé : Background and Aims : Abiotic properties of soil are known to be major drivers of the microbial community within it. Our understanding of how soil microbial properties are related to the functional structure and diversity of plant communities, however, is limited and largely restricted to above-ground plant traits, with the role of below-ground traits being poorly understood. This study investigated the relative contributions of soil abiotic properties and plant traits, both above-ground and below-ground, to variations in microbial processes involved in grassland nitrogen turnover. Methods : In mountain grasslands distributed across three European sites, a correlative approach was used to examine the role of a large range of plant functional traits and soil abiotic factors on microbial variables, including gene abundance of nitrifiers and denitrifiers and their potential activities. Key Results : Direct effects of soil abiotic parameters were found to have the most significant influence on the microbial groups investigated. Indirect pathways via plant functional traits contributed substantially to explaining the relative abundance of fungi and bacteria and gene abundances of the investigated microbial communities, while they explained little of the variance in microbial activities. Gene abundances of nitrifiers and denitrifiers were most strongly related to below-ground plant traits, suggesting that they were the most relevant traits for explaining variation in community structure and abundances of soil microbes involved in nitrification and denitrification. Conclusions : The results suggest that consideration of plant traits, and especially below-ground traits, increases our ability to describe variation in the abundances and the functional characteristics of microbial communities in grassland soils. Lien pérenne : DOI : 10.1093/aob/mcu169 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148965
in Annals of Botany > 114 (2014) . - 1011-1021Legay, Nicolas, Baxendale, Catherine, Grigulis, Karl, krainer, Ute, Kastl, Eva, Schloter, Michael, Bardgett, Richard D., Arnoldi, Cindy, Bahn, Michael, Dumont, Maxime, Poly, Franck, Clément, Jean-Christophe, Lavorel, Sandra (1965-) 2014 Contribution of above- and below-ground plant traits to the structure and function of grassland soil microbial communities. Annals of Botany, 114: 1011-1021.Documents numériques
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