کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
580896 1453151 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Uptake of chromium by Salvinia minima: Effect on plant growth, leaf respiration and carbohydrate metabolism
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Uptake of chromium by Salvinia minima: Effect on plant growth, leaf respiration and carbohydrate metabolism
چکیده انگلیسی
Metabolic responses to chromium (Cr) exposure and metal uptake were investigated using Salvinia minima plants. Cr treatment reduced the dry weight of floating and submerged leaves, while photosynthetic pigments were not affected. Measurements of respiratory oxygen uptake with and without inhibitors (KCN and SHAM) demonstrated that total respiration, alternative oxidase capacity and residual respiration were higher in Cr-treated than in Cr-untreated leaves, but the highest values were observed in floating leaves. Cr affected the soluble sugar content. Sucrose concentration was, in general, higher in Cr-treated than in Cr-untreated leaves, while the glucose concentration showed an inverse pattern. Cr also affected soluble acid invertase activity, but affectation trend was different between both leaves. Highest values of invertase activity were observed in Cr-treated floating leaves. According to our data soluble acid invertase and sucrose seem to be related to alternative oxidase capacity and residual respiration in floating and submerged leaves exposed to Cr. Thereby, this study constitutes an important contribution to understand metabolic relationships between mitochondrial respiration, alternative respiratory pathway and soluble carbohydrates in plants exposed to heavy metals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 177, Issues 1–3, 15 May 2010, Pages 546-553
نویسندگان
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