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Articles by Shahid Umar
Total Records ( 2 ) for Shahid Umar
  Afaq Ahmad Malik , Sanghmitra Suryapani , Javed Ahmad , Shahid Umar , M.Z. Abdin and S.R. Mir
  Artemisinin and its derivatives are potent anti-malarials and have become essential components of Artemisinin Based Combination Therapies (ACTs) for malarial treatment. Over 1 million deaths and 300-500 million cases of malaria are reported annually. Production of artemisinin is less as regards its world demand and access to ACTs is still limited in worst hit countries. Economics of artemisinin yield from A. annua crops determines the cost and availability of ACTs worldwide. Artemisinin yield from Artemisia annua depends on a number of factors including improved agricultural practices. An experiment was conducted in this regard to assess the impact of organic residues from urban areas and industries on A. annua L. Enhancement in artemisinin content, artemisinin yield, herb dry yield and plant characteristics were observed by the application of industrial wastes. Highest artemisinin content in leaf (0.53%) was found at flower initiation stage and highest artemisinin yield (29.97 kg ha-1) was obtained from sewage sludge biosolid treatment. The study reveals that organic waste amendments enhance herbage yield and artemisinin content so these, can be utilized for the commercial production of A. annua with additional benefits of mitigation of environmental pollution caused by the accretion of these large quantities.
  Zohra FATIMA , Abdul MUJIB , Samar FATIMA , Anjum ARSHI and Shahid UMAR
  The effect of plant growth regulators (PGRs) and carbohydrate sources on callus induction, callus growth, and plant regeneration in foxglove was examined. Explants were transferred onto MS medium with various levels of PGRs and carbohydrates to determine the optimum explant and effective combinations of PGR treatment. For callus induction 6.0 mg L-1 of a-naphthalene acetic acid (NAA) and 3.0 mg L-1 of benzyl-aminopurine (BA) were very responsive. Addition of cytokinins (BA and kinetin) at 0.5-3.0 mg L-1 to media containing NAA enhanced callus growth. Shoot regeneration was best achieved in MS + 6.0 mg L-1 of BA. Adenine sulphate (Ade) and casein hydrolysate (Ch) were added to the medium as a nitrogen source to improve plant growth and maximum growth was obtained on medium supplemented with 1.5 mg L-1 of kinetin + 0.5 mg L-1 of IAA + 500 mg L-1 of Ch. Carbohydrates also influenced callus production and shoot regeneration potentiality. Among all the tested carbohydrates (sucrose, maltose, fructose, and glucose) and concentrations (3.0-6.0 g L-1), the optimum carbohydrate concentration was 3.0 g L-1 and was applied to all carbohydrate cases.
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