کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
685877 889051 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hexavalent chromium uptake and its effects on mineral uptake, antioxidant defence system and photosynthesis in Amaranthus viridis L.
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Hexavalent chromium uptake and its effects on mineral uptake, antioxidant defence system and photosynthesis in Amaranthus viridis L.
چکیده انگلیسی

The effects of different concentrations (10−6 M, 10−5 M and 10−4 M) of K2Cr2O7Cr(VI) on some minerals (Mn, Fe, Cu and Zn), lipid peroxidation, activities of antioxidant enzymes, photosynthetic function, and chlorophyll fluorescence characteristics were investigated in hydroponically grown Amaranthus viridis L. Results indicated that chromium was accumulated primarily in roots. In the roots and shoots, the Cr content increased with the increasing Cr(VI) concentrations, and induced decrease of Mn, Fe, Cu and Zn. Chromium Cr(VI) induced oxidation stress and lipid peroxidation in A. viridis L. shown by the increased concentration of MDA. The increased activities of POD and SOD indicated that they could serve as important components of antioxidant defense mechanisms to minimize Cr induced oxidative injury. The net photosynthetic rate, transpiration rate, stomatal conductance and intercellular CO2 concentration were reduced only by high Cr(VI) treatments (10−5 M and 10−4 M). The chlorophyll fluorescence parameters Fv/Fm, Fv′/Fm′, ΦPSII and qP, decreased in Cr(VI)-treated, but qN and NPQ showed an increase in Cr(VI) treated plants.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 99, Issue 7, May 2008, Pages 2628–2636
نویسندگان
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