Dr. Sumira Jan

Publications

• GENOTOXICITY OF CADMIUM ON ROOT MERISTEM OF Vicia faba L.

  Talat Parween, Sumira Jan

  LAP Lambert Academic Publishing. 01/2011;

  The chromosomal aberration of V. faba due to CdCl2 may be due to its potential to enter into nucleus where it bind to the sulphydryl group of ß-tubulin of spindle fibres that alter the ability of tubulin to form microtubules. In an environmental perspective, the bioavailability of Cd++ is an increas... [more] The chromosomal aberration of V. faba due to CdCl2 may be due to its potential to enter into nucleus where it bind to the sulphydryl group of ß-tubulin of spindle fibres that alter the ability of tubulin to form microtubules. In an environmental perspective, the bioavailability of Cd++ is an increasing concern for the range of living organisms including cultivated plants. Therefore combining plant bioassays and root analysis of Cd++ content would allow us to define phytotoxicity thresholds in plants.
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  Alteration in nitrogen metabolism and plant growth during different developmental stages of green gram ( Vigna radiata L.) in response to chlorpyrifos

  Talat Parween, Sumira Jan, Mahmooduzzafar, Tasneem Fatma

  Acta Physiologiae Plantarum. 01/2011; Acta Physiologiae Plantarum (26 April 2011), pp. 1-8. doi:10.1007/s11738-011-0772-2 Key: citeulike:9246107.

  Chlorpyrifos is a widely used broad-spectrum organophosphate insecticide in the agricultural practice. However, extensive use of this insecticide may lead to its accumulation in ecosystem, thus inducing the toxicity to crops and vegetables. To assess chlorpyrifos-induced toxicity in plants, we perfo... [more] Chlorpyrifos is a widely used broad-spectrum organophosphate insecticide in the agricultural practice. However, extensive use of this insecticide may lead to its accumulation in ecosystem, thus inducing the toxicity to crops and vegetables. To assess chlorpyrifos-induced toxicity in plants, we performed the experiment focusing on the growth and nitrogen metabolism of green gram plant (Vigna radiata L.). 20-days-old plants were subjected to chlorpyrifos at concentrations ranging from 0 to 1.5 mM through foliar spray in the field condition. Variation in root and shoot length, activities of nitrate reductase (NR) and content of nitrate, sugar, soluble amino acid and soluble protein were studied at preflowering (5 day after treatment, DAT), flowering (10 DAT) and postflowering (20 DAT) stages of plant development. Of the various concentrations of chlorpyrifos, 0.6 and 1.5 mM showed comparatively more severe toxicity to green gram plants by decreasing root and shoot length, nitrate, NR, soluble sugar and protein content where as at low concentration (0.3 mM) of chlorpyrifos proved stimulant for same parameter. Increase in soluble amino acid was observed in age and dose dependent manner. These results reflect strong parallelism between growth and biochemical activities of the model plant. Further lower dose of chlorpyrifos proved as stimulant where as at higher concentration proved detrimental for growth and nitrogen metabolism.

• Assessing the impact of Chlorpyrifos on growth, photosynthetic pigments and yield in Vigna radiata L. at different phenological stages.

  Talat Parween, Sumira Jan, Mahmooduzzafar, Tasneem Fatma

  African Journal of Agricultural Sciences. 01/2011; Vol. 6(9), 4 May.

  The application of an insecticide is a common practice in the cultivation of mungbean (Vigna radiata L.).It therefore seems important to test the changes that are occurring in this food crop under chlorpyrifos treatments in order to identify the extent to which it tolerates the insecticide applicati... [more] The application of an insecticide is a common practice in the cultivation of mungbean (Vigna radiata L.).It therefore seems important to test the changes that are occurring in this food crop under chlorpyrifos treatments in order to identify the extent to which it tolerates the insecticide application thereby making it an economical food crop. 20 day old seedlings were exposed to different concentrations ranging from0 to 1.5 mM of chlorpyrifos through foliar spray in the field condition. The seedlings were uprooted for analyses and observed at the preflowering (5 days after treatment, DAT), flowering (10 DAT) and postflowering (20 DAT) stages for various morphological parameters such as plant height, number of branches, leaves per plant, total leaf area, plant biomass and photosynthetic pigments namelyChlorophyll (Chl) a, Chl b, Total Chl, and Carotenoid (Car) content.Yield attributing characters likenumber of pods plant-1, number of seeds pod-1 and weight of 100 seeds were analyzed from bothcontrol and treated plants after physiological maturity. All the growth parameters, pigments’ activity and yield parameters increased at 0.3 mM insecticidal treatment, when compared with control. Further increase in insecticide level had a negative impact upon all parameters studied. The data suggests that the application of chlorpyrifos at lower concentration may be a useful tool to increase the seed quality as well as quantity in mungbean plant, apart from their insecticidal properties.
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  Effect of gamma radiation on morphological, biochemical and physiological aspects of plants and plant products.

  Sumira Jan, Talat Parween, T.O. Siddiqi and, Mahmooduzzafar

  Environmental Reviews. 01/2011;

  Research on the basic interaction of radiation with biological systems has contributed to human society through various applications in medicine, agriculture, pharmaceutical and other technological developments. In the agricultural sciences and food technology sectors, recent research has elucidated... [more] Research on the basic interaction of radiation with biological systems has contributed to human society through various applications in medicine, agriculture, pharmaceutical and other technological developments. In the agricultural sciences and food technology sectors, recent research has elucidated the new potential application of radiation for microbial decontamination due to the inhibitory effect of radiation on microbial infestation. The last few decades have witnessed a large number of pertinent works regarding the utilization of radiation with special interest in γ-rays for evolution of superior varieties of agricultural crops of economic importance. In this review, general information will be presented about radiation, such as plant specificity, dose response, beneficial effects, and lethality. A comparison of different studies has clarified how the effects observed after exposure are deeply influenced by several factors, some related to plant characteristics (e.g. species, cultivar, stage of development, tissue architecture and genome organization) and some related to radiation features (e.g. quality, dose, duration of exposure). There are many beneficial uses of radiation that offer few risks when properly employed. In this review, we report the main results from studies on the effect of γ-irradiations on plants, focusing on metabolic alterations, modifications of growth and development and changes in biochemical pathways especially physiological behaviour.
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  Gamma radiation effects on growth and yield attributes of Psoralea corylifolia L. with reference to enhanced production of psoralen

  Sumira Jan, Talat Parween, T. O. Siddiqi, Mahmooduzzafar

  Plant Growth Regulation. 01/2010; DOI: 10.1007/s10725-010-9552-zOnline First™.

  The present work describes radiation-induced effects on vegetative, reproductive traits and psoralen content in Psoralea corylifolia L. The effects of gamma radiation on Psoralea seeds were investigated by exposing seeds with doses of 2.5, 5, 10, 15 and 20 kGy at dose rate of 1.65 kGyh−1 and studyin... [more] The present work describes radiation-induced effects on vegetative, reproductive traits and psoralen content in Psoralea corylifolia L. The effects of gamma radiation on Psoralea seeds were investigated by exposing seeds with doses of 2.5, 5, 10, 15 and 20 kGy at dose rate of 1.65 kGyh−1 and studying the plant growth at three developmental stages: preflowering, flowering and post flowering (seed to seed) after irradiation. Irradiation with lower doses of gamma rays significantly improved vegetative traits while higher doses proved depressing for same parameters. Similar trend was followed in reproductive traits. Psoralen, showed highest concentration in seeds (7.56%) at 20 kGy and lowest in control roots (0.23%). Increment in psoralen was striking for higher gamma doses applied. These long-term changes in plant development may be attributed to alteration in plant genome induced by irradiation. The results show in depth development stimulation and enhancement of secondary metabolite in Psoralea corylifolia L. following low and high dose treatment respectively depicting the potential of gamma rays in plant biotechnology and metabolomics.

• Antioxidant response to Chromium stress in Brassica juncea

  Sumira Jan

  LAP Lambert Academic Publishing. 01/2010;

  The goal of this study was to access the potential of Brassica juncea as hyperaccumulator. Cr is toxic to plants and is a non essential element. The degree of toxicity differs according to the oxidation state of Cr with Cr(VI) being more toxic than Cr(III),7 making it one of few elements that exhibi... [more] The goal of this study was to access the potential of Brassica juncea as hyperaccumulator. Cr is toxic to plants and is a non essential element. The degree of toxicity differs according to the oxidation state of Cr with Cr(VI) being more toxic than Cr(III),7 making it one of few elements that exhibits different physiological and toxicological effects depending on its oxidation state. Chromium-induced modulation in the enzymes and metabolites of antioxidants was investigated at various phenological stages of Indian mustard (Brassica juncea (L.) Czern. and Coss. cv Pusa Jai Kisan)], grown with various levels of chromium (Cr) in pots under natural environmental conditions. Chromium accumulation in the root, stem and leaves increased with the advancement in the age of the plants. For this study, an edible crop was chosen intentionally so as to tap maximum benefit by remediating the contaminated site on one hand and getting uncontaminated seeds to raise the next generation, on the other

• The Antioxidative Response System in Brassica juncea L. cv. pusa Jai Kisan. Exposed to Hexavalent Chromium

  Sumira Jan, Talat Parween, T.O. Siddiqi, Mahmooduzzafar, Altaf Ahmed

  WJAS. 01/2010;

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• Comparative Effect of Azotobacter, Mycorrhizal Inoculum and Nitrogen Fertilizer on

  Sumira Jan, Talat Parween, Mahmooduzzafar, T.O. Siddiqi

  American-Eurasian Journal of Sustainable Agriculture. 01/2009; 3(4): 684-693.

  Vicia faba L. was selected for interactive study with biofertilizers (Azotobacter and Mycorrhizae) and chemical fertilizer Urea. The results indicate that the maximum chlorophyll a, chlorophyll b ,total chlorophyll and careteniod content was found in plants treated with Mycorrhizae + Azatobacter. Th... [more] Vicia faba L. was selected for interactive study with biofertilizers (Azotobacter and Mycorrhizae) and chemical fertilizer Urea. The results indicate that the maximum chlorophyll a, chlorophyll b ,total chlorophyll and careteniod content was found in plants treated with Mycorrhizae + Azatobacter. The minimum Chl a, Chl b and total chlorophyll was found in plants treated with urea. The minimum concentration of caretenoid was found in plants inoculated with Azotobacter alone. The maximum nitrate was observed at flowering stage in the plants treated with Azotobacter + Mycorrhiza. The minimum nitrate content was found in control plants. The maximum nitrate reductase activity was found at flowering stage in plants treated with mix of Azotobacter+ Mycorrhizae and minimum at post flowering stage in control plants. Proline content increased with plant age. The maximum and minimum Proline content was found in the plants treated with Urea and Azotobacter +M ycorrhizae. The protein content was maximum in the leaves of Vicia faba treated with Azotobacter + Mycorrhizae and minimum in plants treated with urea.