کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4421208 1308506 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of Pb stress on nutrient uptake and secondary metabolism in submerged macrophyte Vallisneria natans
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Effects of Pb stress on nutrient uptake and secondary metabolism in submerged macrophyte Vallisneria natans
چکیده انگلیسی

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 0–100 μM Pb for 0–7 d. 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 74, Issue 5, July 2011, Pages 1297–1303
نویسندگان
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