کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6968881 | 1453014 | 2018 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Three years of exposure to lead and elevated CO2 affects lead accumulation and leaf defenses in Robinia pseudoacacia L. seedlings
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
Few studies have explored the long-term effects of elevated atmospheric CO2 combined with lead (Pb) contamination on plants. The objective of this study was to examine the effects of 3 years of elevated CO2 (700â¯Â±â¯23â¯Î¼molâ¯mol-1) on Pb accumulation and plant defenses in leaves of Robinia pseudoacacia L. seedlings in exposed to Pb (500â¯mgâ¯kgâ1 soil). Elevated CO2 increased Pb accumulation in leaves and Pb removal rate in soils. In plants exposed to Pb stress, total chlorophyll and carotenoid contents in leaves were lower under elevated CO2 than under ambient CO2, but seedling height and width increased under elevated CO2 relative to ambient CO2. Elevated CO2 significantly (pâ¯<â¯.01) stimulated malondialdehyde content in leaves under Pb exposure. Superoxide dismutase and catalase activity increased significantly (pâ¯<â¯.01), peroxidase activity decreased significantly (pâ¯<â¯.01), and glutathione, cystine, and phytochelatin contents increased under elevated CO2â¯+â¯Pb relative to Pb alone. Elevated CO2 stimulated the production of soluble sugars, proline, flavonoids, saponins, and phenolics in plants exposed to Pb stress. Ove rall, long-term elevation of CO2 increased Pb-induced oxidative damage in seedlings, but enhanced the phytoextraction of Pb from contaminated soils.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 349, 5 May 2018, Pages 215-223
Journal: Journal of Hazardous Materials - Volume 349, 5 May 2018, Pages 215-223
نویسندگان
Xia Jia, Chunyan Zhang, Yonghua Zhao, Tuo Liu, Yunhua He,