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NPR Vol.4(1) [January-February 2005] >


Title: Gum
Issue Date: Feb-2005
Publisher: CSIR
Abstract: A major break through in‘Recombinant DNA-Technology’ or the‘Genetic-Engineering’ has been the development of several medicinal products such as human insulin of GM bacterial origin and numerous GM-crops.Monsanto and DuPont Companies in USA,have pioneered in developing the so-called‘first generation GM-crops’, which are basically designed for certain agronomic characteristics i.e. pest and weed resistance. This has invariably been done by incorporating a gene fragment of certain strains of bacteria e.g. Bacillus thuringiensis (abbreviated as Bt) into the plant gene, which created pest and weed resistance in the plants. A typical example of GM-crop incorporating DNA from this bacterial strain is Bt-cotton.A team of researchers, headed by Dr Kanwar pal S Dhugga, at the Pioneer Hi-Bred International Inc. (a subsidiary of DuPont Company), has claimed(published in Science, January 16, 2004)to identify the galacto mannan-producing gene in legume plants such as guar and carob tree (locust bean). According to Dr Dhugga biosynthetic route to galactomannan polysaccharide involves two enzymes i.e. the one which produces linear mannan backbone of the molecule and the other, which adds the galactose graft to the backbone. Pioneer researcher shave identified the gene that encode these enzymes and using biotechnology tools,the gene was transferred into soybean seed which according to the researchers shall now produce, a galactomannan polysaccharide, in addition to the normal soybean constituents, soy-protein and edible soy-oil.
Page(s): 58
ISSN: 0975-1092 (Online); 0972-592X (Print)
Source:NPR Vol.4(1) [January-February 2005]

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