Tolerance of Two Hydroponically Grown Salix Genotypes to Excess Zinc |
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| Authors: | Andon Vassilev Araceli Perez-Sanz Ann Cuypers Jaco Vangronsveld |
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| Affiliation: | 1. Agricultural University of Plovdiv, Department of Plant Physiology and Biochemistry , Plovdiv, Bulgaria;2. Departamento de Investigación en Desarrollo Rural , Instituto Madrile?o de Investigación Agraria y Alimentaria , Alcalá de Henares, Spain;3. Environmental Biology, Centre for Environmental Sciences , Hasselt University , Diepenbeek, Belgium |
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| Abstract: | ![]()
Woody cuttings from two Salix genotypes (genotype I—clone LUC-31, Salix alba and genotype II- clone STOTT, Salix viminalis) were grown hydroponically for 14 days at increasing concentrations of Zn: control, 50, 100 or 150 μ M Zn. Genotype tolerance to excess zinc (Zn) was evaluated using a root elongation test. The changes in growth, Zn, iron (Fe), copper (Cu) and manganese (Mn) concentrations as well as photosynthetic performance were used as additional evaluation criteria. Photosynthetic pigments concentrations in Zn-exposed cuttings of genotype II decreased as compared with genotype I, which corresponded well with the higher leaf Zn accumulation, decreased Fe concentrations as well as lowered photosynthetic rate. Based on the indicators used, genotype I (Salix alba) was classified as more tolerant to excess Zn than genotype II (Salix viminalis). |
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| Keywords: | Salix zinc tolerance photosynthesis mineral nutrients |
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