S. Dutta Gupta

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Activity of antioxidant enzymes was evaluated during somatic embryogenesis and shoot organogenesis from cultured leaf segments of Gladiolus hybridus Hort. The effect of exogenous antioxidants on somatic embryogenesis and shoot organogenesis has also been monitored. Activity of superoxide dismutase (SOD) gradually increased during somatic embryogenesis.(More)
Advances in plant tissue culture methods with regard to lighting requirements are currently focused on the improved features of light-emitting diodes (LEDs). Over the years, the steady development of LED technology, with the emergence of new types of semi-conductor materials, has made it possible to apply it in an increasing number of new areas. As an(More)
Somatic embryos were obtained from callus cultures derived from leaf explants of the winged bean, Psophocarpus tetragonolobus (L.) DC. Initiation and development of the somatic embryos occurred with a two-step culture method. Callus cultures initiated on MS medium with NAA and BAP, upon transfer to a new medium with IAA and BAP, produced somatic embryos.(More)
Somatic embryos were induced directly on adaxial surface of cotyledonary leaves within 8–10 days of culture on Murashige and Skoog medium containing 5.37 to 10.74 μM 1 — napthaleneacetic acid and 2.22 μM benzyl adenine. Germinated embryos with shoot axes developed into complete plants after transfer onto half stength Murashige and Skoog medium containing(More)
Two rice varieties, viz. Nonabokra and Pokkali, have been evaluated for their responses to salinity in terms of some physiological and biochemical attributes. During the exposure to salinity (200 mM concentration of sodium chloride for 24, 48, and 72 h), a significant increase in sodium was recorded which was also concomitant with the changes of other(More)
Callus was successfully initiated on root, mesocotyl and leaf base segments of 3- to 4-day-old seedlings of ragi (Eleusine coracana Gaertn.). 2,4-D along with casein hydrolysate for Murashige and Skoog's basal medium was found to be most effective for callus initiation and maintenance. Mesocotyl and leaf base tissue derived calli gave shoot buds in medium(More)
An efficient and reproduciblein vitro culture system has been developed for regeneration of multiple shoot clumps from intact seedlings of both lowland and upland cultivars of switchgrass (Panicum virgatum L.). The multiple shoots were induced on Murashige and Skoog medium supplemented with various combinations of 2,4-dichlorophenoxyacetic acid (2,4-D) and(More)
Influence of auxin type and concentration on somatic embryogenesis from cotyledonary explants of safflower was investigated. Embryogenic frequency as well as number of somatic embryos was dependent on auxin type and concentration. NAA at 10.74 μM (2 mg l−1) was optimum for high frequency of somatic embryos, whereas IAA provided the maximum number of somatic(More)
Adventitious shoot buds were induced directly on the adaxial surface of the cotyledons of eight safflower cultivars after 14 d of culture initiation on Murashige and Skoog's (MS) medium supplemented with various levels of 6-benzylaminopurine (BA). Maximum shoot organogenesis of 54.4% with 10.2 shoots per responding cotyledon was obtained with 8.87 μM BA in(More)
Determination of glutathione and glutathione disulphide using glutathione reductase and 2-vinyl pyridine. Anal. Effect of glycine-betain on chloroplast ultrastructure, chlorophyll and protein content, and RuBPCO activities in tomato grown under drought or salinity. Oxidative stress caused by excess copper in oat leaves. Effect of heavy metal ions on(More)