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Advisor(s)
Abstract(s)
Soil contamination with Cd is of primary concern and beneficial soil restoration strategies urge. The aim of
this work is to evaluate the response of two different genotypes of Pinus pinaster (wild and selected) to Cd
contamination and to assess how inoculation with ectomycorrhizal fungi, Suillus bovinus and Rhizopogon
roseolus, influenced each genotype. Seedlings were exposed to soil contaminated at 15 and 30 mg Cd kg−1.
Plant growth, mycorrhizal traits and Cd accumulation in different tissues of the plant were determined at
harvest. The fungal community was assessed by denaturing gradient gel electrophoresis. At 15 mg Cd kg−1
S. bovinus increased aboveground development in both genotypes. At 30 mg Cd kg−1 non-inoculated wild
genotype accumulated more Cd in the shoots (1.7-fold) than the selected genotype; inoculation with R.
roseolus decreased Cd concentration in the roots of the selected genotype whereas the opposite occurred
in the wild genotype. Cd concentration in the root system was the parameter most influenced by the
interaction between the three studied variables. The fungal community established was affected by the
Cd concentration in the soil. Results show that different genotypes of P. pinaster react differently to Cd
exposure depending on the mycorrhizal association. The importance of considering the combination
between plant genotype and its symbiotic partners when aiming at the forestation of degraded land is
highlighted.
Description
Keywords
Forestation Heavy metals Maritime pine Genotype Ectomycorrhizal fungi
Citation
SOUSA, N. R. ...[et al.] - A genotype dependent-response to cadmium contamination in soil is displayed by Pinus pinaster in symbiosis with different mycorrhizal fungi. ISSN 0929-1393. Applied Soil Ecology. Vol. 76 (2014), p. 7– 13
Publisher
Elsevier
Elsevier
Elsevier