Please use this identifier to cite or link to this item: http://hdl.handle.net/10603/6634
Title: Morphological and Physiological Responses of Withania somnifera to Heavy metals Ni and Cd and UV B radiation
Researcher: Tiwari, Tripti
Guide(s): John, Suchit A
Keywords: Botany
Withania somnifera
Upload Date: 23-Jan-2013
University: Sam Higginbottom Institute of Agriculture, Technology and Sciences
Completed Date: 03/03/2012
Abstract: At present one of he major issues of potential environmental concern is the depletion of stratospheric concern is the depletion of stratospheric ozone layer, and the consequent increase in UV-B radiation reaching the Earth surface. UV-B radiation is energetically capable of disrupting proteins, nucleic acid and other important plant pigment. Several other studies indicated that supplemental UV-B radiation can deleteriously affect physiological process and overall growth in a number of plant species. Besides enhanced UV-B radiation, a great deal of interest has been generated to study the toxic effects of heavy metals on plants during recent years. Heavy metal pollution is increasing in the environment due to mining, industrializing, transportation, waste dumping and other anthropogenic activities. Airborne heavy metals fall upon, react with, and are absorbed by plants and soils near the sites of pollutant generation. A characteristic feature of toxicities due to heavy metal is chlorosis and reduction in net photosynthetic rate leading to decreased growth and productivity. Among heavy metal pollutants, nickel (Ni) and cadmium (Cd) needs special reference for their potential harmful effect on plants. Cd is established as a biotoxic heavy metal, which enters our environment mainly due to industrial activities, use of Cd containing phosphate fertilizers and sewage sludge in agriculture and abrasion of automobile tires. Ni is consider as essential micronutrient for plants, but is strongly phytotoxic at higher concentration. Ni is produced during production of stainless steel, storage batteries, spark plugs, magnets, machinery and due to use of sewage sludge. Burning of petroleum contributes the greatest emission of vanadium and nickel.
Pagination: 233p.
URI: http://hdl.handle.net/10603/6634
Appears in Departments:Department of Biological Sciences

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01_title.pdfAttached File81.21 kBAdobe PDFView/Open
02_certificate.pdf213.98 kBAdobe PDFView/Open
03_contents.pdf64.94 kBAdobe PDFView/Open
04-list of tables & figures abbreviations.pdf226.13 kBAdobe PDFView/Open
05_acknowledgements & abstract.pdf164.04 kBAdobe PDFView/Open
06_chapter 1.pdf110.79 kBAdobe PDFView/Open
07_chapter 2.pdf268.72 kBAdobe PDFView/Open
08_chapter 3.pdf686.97 kBAdobe PDFView/Open
09_chapter 4.pdf901.6 kBAdobe PDFView/Open
10_chapter 5.pdf190.8 kBAdobe PDFView/Open
11_chapter 6.pdf125.55 kBAdobe PDFView/Open
12_references.pdf266.48 kBAdobe PDFView/Open
13_appendix.pdf2.79 MBAdobe PDFView/Open


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