Intraspecific variation of physiological and molecular response to cadmium stress in Populus nigra L. (Abstract/Poster in atti di convegno)

Type
Label
  • Intraspecific variation of physiological and molecular response to cadmium stress in Populus nigra L. (Abstract/Poster in atti di convegno) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Alternative label
  • Gaudet M.1; Beritognolo I.2; Iori V.3; Massacci A.3; Pietrini F.3; Sabatti M.1; Scarascia Mugnozza G.4; Zacchini M.3 (2010)
    Intraspecific variation of physiological and molecular response to cadmium stress in Populus nigra L.
    in Fifth International Poplar Symposium, Orvieto, 20-25 Settembre 2010
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gaudet M.1; Beritognolo I.2; Iori V.3; Massacci A.3; Pietrini F.3; Sabatti M.1; Scarascia Mugnozza G.4; Zacchini M.3 (literal)
Pagina inizio
  • 187 (literal)
Pagina fine
  • 187 (literal)
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  • Settore Scientifico Disciplinare AGR/07 genetica agraria (literal)
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  • http://www.sisef.it/IPS-V/data/material/IPS-V%20Book%20of%20Abstracts.pdf (literal)
Note
  • Abstract (literal)
  • Google Scholar (literal)
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  • 1 Università degli Studi della Tuscia, Dipartimento di Scienze dell'Ambiente Forestale e sue Risorse DISAFR. Viterbo Italy 2 CNR Istituto per i Sistemi Agricoli e Forestali del Mediterraneo - ISAFOM. Perugia, Italy 3 CNR Istituto di Biologia Agro-ambientale e Forestale - IBAF, Monterotondo Scalo, Roma Italy 4 CRA Dipartimento Agronomia, Foreste e Territorio, Consiglio per la Ricerca e Sperimentazione in Agricoltura - DAF, Roma, Italy (literal)
Titolo
  • Intraspecific variation of physiological and molecular response to cadmium stress in Populus nigra L. (literal)
Abstract
  • In the last twenty years, cadmium (Cd), which is relatively rare in its natural form, has become one of the most widespread hazardous pollutants due to its wide use in industrial, agricultural and domestic applications. Among the advanced and innovative treatment methods, phytoremediation is one of the least expensive. Several studies showed that the Salicaceae family, with its genera Salix (willows) and Populus (poplars), is well suitable for phytoremediation. The genus Populus presents a wide natural variability due to its adaptation to contrasting environments. Recent works concluded that Populus nigra (P. nigra) holds interesting potential for phytoremediation. Little is known about the variability of the response to heavy metal stress within the species, while it could be a key for a better understanding of tolerance mechanisms and for breeding. The aim of the present study was to characterize the natural variation of response to Cd in P. nigra in order to understand the different mechanisms of Cd tolerance. Two P. nigra genotypes, originating from contrasting environments in northern and southern Italy, were submitted to Cd stress in hydroponics during three weeks to enhance the transpiration-driven Cd translocation to leaves. Biomass production, photosynthetic performance and Cd concentration in leaves were measured at the end of the experiment. Furthermore, some candidate genes, involved in response to heavy metal stress, were characterized by expression pattern and genetic linkage analysis. Biomass production and photosynthesis were significantly affected by the treatment in both clones but the southern clone was markedly more tolerant to Cd stress than the other despite the Cd concentration of leaves was not significantly different between them and was quite low compared to other species. Thiol and phytochelatin content, associated to the transcription profile of glutathione S-transferase gene, indicated relevant differences in the use of phytochelatin pathway under Cd stress that could explain the different tolerance to Cd. The northern clone accumulated thiols (dire avec precision lesquels), but down-regulated GST gene, whereas the southern clone accumulated phytochelatins and up-regulated GST genes, which can be useful to complex and detoxify Cd. This response suggests that the gluthatione pathway can be alternatively targeted at detoxifying oxidative stresses or complexing of Cd ions. The natural germplasm of P. nigra represents a valuable resource for understanding tolerance to Cd and for selecting of plant material for phytoremediation. (literal)
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