title: Screening of poplar clones for cadmium phytoremediation using photosynthesis, biomass and cadmium content analyses.
abstract: Variability of cadmium tolerance and distribution in plant organs was investigated in ten selected poplar clones from different species, hybrids and genotypes. To this end, plants were exposed for three weeks to 50 microM CdSO4 in hydroponics. Cadmium accumulation in roots, stem and leaves as well as biomass production and photosynthesis maintenance varied greatly among clones. The metal mostly accumulated in roots, up to 80% in some clones, and interestingly, only 50% in some others. In general, metal tolerance reflected the degree of photosynthesis inhibition, which was higher in clones with high cadmium accumulation in leaves. Biomass production, net photosynthesis, transpiration, and pigment content were differently reduced in cadmium-treated clones with respect to control. The variability of cadmium distribution among leaves, stem, and roots provides candidate poplars for specific phytoremediation processes of contaminated waters and soils.
authors: Institute of Agro-Environment and Forest Biology of National Research Council, Monterotondo Scalo, Roma, Italy.
authors: Fabrizio
authors: F
authors: Pietrini
authors: Massimo
authors: M
authors: Zacchini
authors: Valentina
authors: V
authors: Iori
authors: Lucia
authors: L
authors: Pietrosanti
authors: Daniele
authors: D
authors: Bianconi
authors: Angelo
authors: A
authors: Massacci
mesh_terms: D001673:Biodegradation, Environmental / Q000187:drug effects; D018533:Biomass; D002104:Cadmium / Q000302:isolation & purification* / Q000378:metabolism* / Q000633:toxicity; D002734:Chlorophyll / Q000378:metabolism; D002999:Clone Cells; D005453:Fluorescence; D005740:Gases / Q000378:metabolism; D010788:Photosynthesis / Q000187:drug effects; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development; D018547:Plant Stems / Q000187:drug effects / Q000254:growth & development; D032107:Populus / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*; D046509:Tissue Culture Techniques / Q000379:methods*
chemical_list: D005740:Gases; D002104:Cadmium; D002734:Chlorophyll