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Advisor(s)
Abstract(s)
Solanum nigrum was found to proliferate in sediments with high levels of metal pollution. The effect of Zn on plant growth and tissue
metal accumulation was assessed. The response of the plant to the inoculation with four different isolates of arbuscular mycorrhizal fungi
(AMF) (Glomus sp. BEG140, Glomus claroideum, Glomus mosseae and Glomus intraradices) was studied. While the isolates of AMF did
not have a significant (P < 0.05) influence on mycorrhizal colonisation, increasing Zn concentration to high levels (500 and
1000 mg kg 1) induced significant (P < 0.05) decrease of the AMF colonisation. In general, the presence of AMF did not affect the
growth and biomass of S. nigrum individuals. However, the level of metal in the matrix affected S. nigrum growth; plants grown at
100 mg kg 1 had significantly (P < 0.05) lower leaf, stem, root and total biomass than control ones and plants growing at 500 and
1000 mg kg 1 had the significantly (P < 0.05) lowest biomass. Plants inoculated with the AMF G. claroideum and G. intraradices presented
significantly (P < 0.05) higher Zn accumulation in all plant tissues. In general, the stem tissues had the higher Zn content while
the leaves registered the lowest values, which indicate a high translocation of the metal. AMF inoculation had no significant (P < 0.05)
influence on the metal translocation within the plant. This study suggests that inoculation with the AMF G. claroideum or G. intraradices,
can enhance the Zn accumulation in the tissues of S. nigrum, not affecting the plant translocation capacities.
Description
Keywords
Heavy metal Black nightshade Arbuscular mycorrhizal fungi Zinc Phytoremediation Phytoextraction
Citation
MARQUES, Ana P. G. C...[et al.] - Zinc accumulation in Solanum nigrum is enhanced by different arbuscular mycorrhizal fungi. Chemosphere. ISSN 0045-6535. Vol. 65, n.º 7 (2006), p. 1256-1263
Publisher
Elsevier