Molecular and Physiological Aspects for Lepidium sativum Tolerance in Response to Lead Toxicity.
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Title
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Ibrahim M.M., Bafeel S.O.
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Author
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E Mail: m_ibramim2004@yahoo.com mibrahim@ksu.edu.sa,
Mobile #: 00966- 552392920
Web site: http://faculty.ksu.edu.sa/mmi/default.aspx
http://king-saud.academia.edu/MohamedIbrahim
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Contact
Information
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Recent address: Teachers College, Science department (Biology Section).
Permanent address: Alexandria University, Faculty of Science, Botany and Microbiology department.
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Department
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Molecular Plant Physiology
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Major
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Citation
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2011
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Year of Publication
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PSP- Parlar Scientific Publication
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Publisher
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Parlar Scientific Publication
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Sponsor
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Research paper
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Type of Publication
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ISSN
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Parlar Scientific Publication
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URL/DOI
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Yes
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Full Text
(Yes, No)
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Lead; Photosynthetic pigments; antioxidant enzymes
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Keywords
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The present study was undertaken to evaluate the toxicity of Pb2+ on photosynthetic pigments, total soluble protein and MDA contents as well as the activities of SOD, CAT and POD in Lepidium sativum leaves after 10-days of supplying Lead (0-600 ppm) in the nutrient solution. The results indicated that Lead treatment adversely affected plant growth and disturbed the cell metabolism critically. The development of toxic symptoms, corresponded to a high accumulation of Pb2+, was a sum to the increase in H2O2 and MDA contents, decrease in protein content, and the much elevated SOD and POD activities in leaves. In addition, the results demonstrated that exposure to high concentration of lead (Pb2+ > 400 ppm), could result the disintegration of antioxidant system in Lepidium seedlings. Also the significant decrease in the contents of photosynthetic pigments was related to high-level metal stress. Higher concentrations of Pb2+, especially 400 and 600 ppm, resulted in a great variation in protein pattern distribution. The outcome of this study corroborate that Lepidium sativum is a suitable hyper-accumulator candidate and tolerate against low-level lead contaminated soil.
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Abstract
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