Ruchi Maheshwari

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Lead concentration is increasing rapidly in the environment due to increased use of its sources by human society. Alarming concentrations of the metal have been reported in dust of densely populated urban areas and, water and land of various areas near the industrial waste disposals. Plants absorb lead and accumulation of the metal have been reported in(More)
Seedlings of rice (Oryza sativa L.) cv. Pant-12 grown in sand cultures containing 200 and 400 μM NiSO4, showed a decrease in length and fresh weight of roots and shoots. Nickel was readily taken up by rice seedlings and the concentration was higher in roots than shoots. Nickel-treated seedlings showed increased rates of superoxide anion (O 2 •− )(More)
When the seeds of two rice cvs. Malviya-36 and Pant-12 were germinated up to 120 h in the presence of 200 and 400 μM NiSO4, a significant reduction in the germination of seeds occurred. Seeds germinating in the presence of 400 μM NiSO4 showed about 12–20% decline in germination percent, about 20–53% decline in lengths and about 8–34% decline in fresh(More)
A concentration dependent decrease in root nitrate reductase (E.C. activity (NRA) by 0.1 to 2.0 mM lead acetate was noticed in three cultivars of Vigna radiata (L.) Wilczek (K851, MH8320 and ML337). Leaf NRA, on the other hand, increased significantly with increasing lead concentration which was more pronounced in cvs. MH8320 and ML337 than in cv.(More)
Seedlings of two rice cvs Malviya-36 and Pant-12, when grown under increasing levels of nickel (Ni2+: 200 and 400 μM) in the nutrient medium, showed increased levels of RNA, soluble proteins and free amino acids, especially proline over a total growth period of 5–20 days. Ribonuclease (RNase) and protease activities decreased in both roots and shoots due to(More)
Spices are an important group of agricultural commodities being used by many civilizations all over the world to aid flavor, taste and nutritional values in the food. In traditional medical systems, their ability to heal various physical, mental and emotional problems has widely been reported. With this view, HPLC analysis was performed to estimate phenolic(More)
Cytokinins induced haustoria formation in excised 10-mm segments ofCuscuta vine, the subapical 25-to-50-mm region being most responsive, producing a mean of 4–6 haustoria per segment. The order of effectiveness of cytokinins continuously applied (72 h) was 6-benzylaminopurine (BA) ⩾ isopentenyladenine (iP) ≫ zeatin (Z). Ribosides of BA and Z were as(More)
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