Root biomass production in populations of six rooted macrophytes in response to Cu exposure: Intra-specific variability versus constitutive-like tolerance
2014
Marchand, Lilian | Nsanganwimana, Florien | Lamy, Jean-Baptiste, J.-B. | Quintela-Sabarís, C. | Gonnelli, C. | Colzi, I. | Fletcher, T. | Oustrière, Nadège | Kolbas, Aliaksandr | Kidd, Petra | Bordas, F. | Newell, P. | Alvarenga, P. | Deletic, A. | Mench, Michel | Biodiversité, Gènes & Communautés (BioGeCo) ; Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB) | Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) | Universidad del Pais Vasco / Euskal Herriko Unibertsitatea [Espagne] (UPV/EHU) | Università degli Studi di Firenze = University of Florence (UniFI) | Department of Civil Engineering ; Universidade Federal do Espirito Santo (UFES) | Consejo Superior de Investigaciones Cientificas = Spanish National Research Council (CSIC) | Université de Limoges (UNILIM) | Contaminated Sites Branch ; Partenaires INRAE
International audience
Afficher plus [+] Moins [-]anglais. Intra-specific variability of root biomass production (RP) of six rooted macrophytes, i.e. Juncus effusus, Phragmites australis, Schoenoplectus lacustris, Typha latifolia, Phalaris arundinacea, and Iris pseudacorus grown from clones, in response to Cu exposure was investigated. Root biomass production varied widely for all these macrophytes in control conditions (0.08 μM) according to the sampling site. Root biomass production of T. latifolia and I. pseudacorus in the 2.5–25 μM Cu range depended on the sampling location but not on the Cu dose in the growth medium. For P. australis, J. effusus, S. lacustris, and P. arundinacea, an intra-specific variability of RP depending on both the sampling location and the Cu-dose was evidenced. This intra-specific variability of RP depending on the sampling location and of Cu-tolerance for these last four species suggests that Cu constitutive tolerance for all rooted macrophytes is not a species-wide trait but it exhibits variability for some species.
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