Study on heavy metal absorption by plants

2001 2001

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Abstract (summary)

Two groups of container experiments were conducted to study heavy metal absorption by plants. The objectives of the first group of experiments were: (1) to evaluate the effect of Cd, Pb, and Cu, on productivity, essential oil content and quality of peppermint, basil, dill, and sage, and (2) to estimate metal transfer and accumulation in plant parts and in the essential oils. In the first experiment, elevated concentrations of Cd (2, 6, and 10 mg/L), Cu (20, 60, and 150 mg/L), and Pb (50, 100, and 500 mg/L) on basil, peppermint, and sage were evaluated. Cadmium and Pb did not decrease peppermint yields. The application of Cu. at 60 and 150 mg/L reduced yields compared to the control. Basil yields were reduced by application of Cd at 6 and 10 mg/L, Ph at 500 mg/L, and Cu at 20, 60, and 150 mg/L. Sage yields were reduced by Cd at 6 and 10 mg/L, Pb at 50, 100, and 500 mg/L, and by Cu. at 60, and 150 mg/L. All three plants developed phytotoxicity symptoms in the 150 mg/L Cu treatment. In the next experiment, the following concentrations were applied to peppermint and basil growth medium (in mg/L): Cd 10; Pb 100; Cu 100; Cd 10 + Ph 100; Cd 10 + Cu 100; Ph 100 + Cu 100; Cd 10 + Ph 100 + Cu 100; and control (without metal addition). The following metal concentrations were applied to the growth medium of dill (in mg/L): Cd at 2, 6, and 10; Pb at 50, 100, and 500; Cu at 20, 60, and 150, and a control (without metal addition). Neither of the compost treatments resulted in toxic tissue concentration of heavy metals. Both compost and heavy metal applications induced alterations in the essential oil constituents of peppermint, dill, basil, and sage, without a clear trend. However, the essential oils from the four plants from all treatments were not polluted with Cd, Cu, and Pb. In conclusion, peppermint, dill, basil, and sage could be grown in metal polluted soils as cash crops or for phytoremediation, without risk of contamination of the end product, the essential oils. (Abstract shortened by UMI.)

Indexing (details)

Soil sciences
0285: Agronomy
0481: Soil sciences
Identifier / keyword
Biological sciences; Essential oils; Heavy metal absorption; Metal fractionation; Phytoremediation; Soil-plant relationships
Study on heavy metal absorption by plants
Jeliazkov, Valtcho Demirov
Number of pages
Publication year
Degree date
School code
DAI-B 62/04, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
0493219080, 9780493219080
Craker, Lyle E.
University of Massachusetts Amherst
University location
United States -- Massachusetts
Source type
Dissertations & Theses
Document type
Dissertation/thesis number
ProQuest document ID
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
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