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Effects of Pb stress on nutrient uptake and secondary metabolism in submerged macrophyte Vallisneria natans.
- Source :
-
Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2011 Jul; Vol. 74 (5), pp. 1297-303. Date of Electronic Publication: 2011 Mar 26. - Publication Year :
- 2011
-
Abstract
- For better understanding the metabolic adaptations to Pb stress in submerged plants, the alterations in mineral elements uptake and in secondary metabolism were studied in leaves of Vallisneria natans (Lour.) Hara exposed to 0-100μM Pb for 0-7d. Pb content increased in leaves in a dose-dependent way. The increase of calcium, magnesium and iron content and the decrease of phosphorus, potassium and manganese content were detected in leaves of V. natans under Pb stress, while no significant changes were detected in copper and zinc concentration. Meanwhile, there was an increase in the concentrations of total phenolic and flavonoids. Pb treatment caused an increase in the catalytic activities of shikimate dehydrogenase, phenylalanine ammonialyase and polyphenol oxidase. The results suggest that nutrient uptake and secondary metabolism were actively regulated by V. natans plants in response to Pb stress.<br /> (Copyright © 2011 Elsevier Inc. All rights reserved.)
- Subjects :
- Alcohol Oxidoreductases metabolism
Catechol Oxidase metabolism
Copper metabolism
Dose-Response Relationship, Drug
Flavonoids metabolism
Hydrocharitaceae metabolism
Iron metabolism
Lead metabolism
Manganese metabolism
Phenylalanine Ammonia-Lyase metabolism
Phosphorus metabolism
Plant Leaves drug effects
Plant Leaves metabolism
Stress, Physiological
Trace Elements metabolism
Water Pollutants, Chemical metabolism
Zinc metabolism
Hydrocharitaceae drug effects
Lead toxicity
Water Pollutants, Chemical toxicity
Subjects
Details
- Language :
- English
- ISSN :
- 1090-2414
- Volume :
- 74
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Ecotoxicology and environmental safety
- Publication Type :
- Academic Journal
- Accession number :
- 21440937
- Full Text :
- https://doi.org/10.1016/j.ecoenv.2011.03.005