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Growth and survival of Halimione portulacoides stem cuttings in heavy metal contaminated soils |
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| Institution: | 1. Laboratoire des Plantes Extremophiles (LPE), Centre de Biotechnologies de la Technopole de Borj Cedria, BP 901, Hammam Lif 2050, Tunisia;2. Departamento de Fisiologia Vegetal, Facultad de Ciencias, Universidad Autonoma de Barcelona, E-08193 Bellaterra, Spain;3. Groupe de Recherche en Physiologie Végétale (GRPV), Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium;1. Unitat de Fisiologia Vegetal, Dep. BABVE, Facultat Biociences, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain;2. Laboratoire des Plantes Extremophiles, Centre de Biotechnologies de la Technopole de Borj-Cedria, BP 901, Hammam Lif 2050, Tunisia;1. MARE – Marine and Environmental Sciences Centre, Faculty of Sciences of the University of Lisbon, Campo Grande, 1749-016 Lisbon, Portugal;2. Marine Biological Laboratory, University of Copenhagen, 3000 Helsingor, Denmark;3. MARE – Marine and Environmental Sciences Centre, Faculty of Sciences and Technology, University of Coimbra, 3000 Coimbra, Portugal |
| Abstract: | The halophytic shrub Halimione portulacoides demonstrates a high tolerance to heavy metal contamination and a capacity for accumulating metals within its tissues. On the Iberian Peninsula, this species has colonized habitats with high levels of metal pollution. The aim of this study is to analyze the response of H. portulacoides stem cuttings to this pollution. Growth, photosynthesis and metal uptake were examined in H. portulacoides through an experiment in which stem cuttings were replanted in metal-contaminated soil. This condition decreased growth and lowered both photosynthetic rate and stomatal conductance. Reduced photosynthetic performance was largely due to the reduced concentration of photosynthetic pigments. Despite these responses, there was some important evidence suggesting the phytoremediatory potential of Halimione stem cuttings. The results of our study indicate that this salt-marsh shrub may represent a biotool of value in the restoration of polluted areas. |
| Keywords: | Photosynthesis Phytoremediation Stem cuttings Wetlands restoration net photosynthetic rate chlorophyll a chlorophyll b carotenoids minimal fluorescence level in the dark-adapted state maximal fluorescence level in the dark-adapted state variable fluorescence level in the dark-adapted state maximum quantum efficiency of PSII photochemistry ΦPSII"} {"#name":"keyword" "$":{"id":"k0125"} "$$":[{"#name":"text" "_":"quantum efficiency of PSII Gs"} {"#name":"keyword" "$":{"id":"k0135"} "$$":[{"#name":"text" "_":"stomatal conductance NPQ"} {"#name":"keyword" "$":{"id":"k0145"} "$$":[{"#name":"text" "_":"non-photochemical quenching RGR"} {"#name":"keyword" "$":{"id":"k0155"} "$$":[{"#name":"text" "_":"relative growth rate |
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