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Articles by S.A. Nasim
Total Records ( 3 ) for S.A. Nasim
  R. Srivastava , R. Khan , S.A. Nasim , N. Manzoor and Mahmooduzzafar
  Glycine max L. (Soybean) is known for having its medicinal and nutritional value. It has capacity to accumulate high concentrations of cadmium (Cd). Studies were carried out to evaluate secondary metabolites production and biochemical potential of plant exposed to Cd-rich growing medium. Cd treatment in the form of Cadmium chloride (CdCl2) at supply of 0.25, 0.50, 1.00 and 2 mg L-1 increased the amino acid, protein, proline and diadzene content in field grown soybean plants at different developmental stages of Glycine max L. The enhancement was significant at Cd treatment of 1 mg L-1. The activity of antioxidant enzymes viz., superoxide dismutase (SOD), catalase (CAT) and Glutathione Reductase (GR) increased with increase in treatment of Cd in all developmental stages of soybean but increase in enzyme activity was more significant at Cd treatment of 2 mg L-1. Present finding suggested that higher diadzene production in cd enriched soyabeen contributed to higher medicinal value.
  B. Dhir , S.A. Nasim , S. Samantary and S. Srivastava
  Accumulation of osmolytes in terrestrial plants in response to environmental stresses is well reported and information about aquatic plants is limited. Present study aimed to investigate if the aquatic weed, Salvinia natans accumulates osmolytes/compatible solutes on exposure to various heavy metals. Plants exposed to heavy metals viz. Cd, Cu, Ni, Cr, Mn, Fe, Co, Pb and Zn, were harvested after 48 h and various osmolytes including sucrose, mannitol, proline, glycine betaine and polyamines were estimated using biochemical methods. Results suggested that heavy metal stress does trigger the accumulation of osmolytes such as sucrose, mannitol and glycine betaine. In contrast proline accumulation was not observed. Studies of heavy metal stress on the endogenous levels of polyamines showed presence of free polyamines, while conjugated and bound forms were not detected. Among free polyamines, Putrescine (Put) and Spermidine (Spd) did not show significant decrease in heavy metal exposed Salvinia except Pb and Fe exposed plants. Spermine (Spm) content showed decline in heavy metal exposed Salvinia. The decrease in polyamine levels indicated their possible role in combating oxidative stress induced by heavy metals. Studies suggest that accumulation of osmolytes under heavy metal stress might help in imparting tolerance in Salvinia.
  B. Dhir , S.A. Nasim , S. Nafees and S. Srivastava
  In the present investigation, tomato plants irrigated with treated wastewater were evaluated for their toxicity using short term (acute) animal studies. Male wistar rats fed with tomato plants at the dosage of 150 and 300 mg kg–1 b.wt. for 14 consecutive days showed no symptoms of toxicity. Assessment of haematological parameters such as RBC, WBC, haemoglobin, platelet count showed no significant changes. Plasma and serum analysis also indicated no significant differences in parameters such as urea, AST, ALT, ALP, bilirubin in all the treatments. The present investigations suggested that short term wastewater irrigation in plants do not pose any toxicity to animals. The toxicity depends upon the level of composition of treated wastewater and its transfer to the soil and then plants. Further studies are required to assess toxic effect of long term irrigation with treated wastewater.
 
 
 
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