Genetically modified crops have been under scrutiny for being unhealthy, destroying the traditional cropping practices and yet they seem to be providing answers to burgeoning food requirements. A careful system of scientific monitoring has to be in place prior to the induction of such endeavours in India.
Genetic modification: the science behind it A gene is a code that governs our appearance and characteristics. When a scientist genetically modifies (GM) a plant, s/he inserts a foreign gene in the plant’s own genes. What makes it possible to transfer genes from one species to another is the fact that all genes are created from the same material DNA. Beneficial genes are transferred into plant cells using a soil bacterium, Agrobacterium tumefaciens, which can produce tumour-like growths in plants and has the ability to alter plants’ DNA. For example, when a gene from a bacterium that is resistant to pesticide is inserted into a plant’s gene, the plant will be able to withstand pesticides. Genetic modification does not always involve moving a gene from one organism to another. Sometimes it means changing how a gene works by ‘switching it off’ to stop something from happening. For example, the gene for softening a fruit could be switched off so that although the fruit ripens in the normal way, it will not soften as quickly. This can be useful because it means that damage is minimised during packing and transportation.
In traditional processing, characteristics can only be exchanged between species which are the same or very similar. By genetic modification, however, it is now possible to add a fish gene to a tomato. By this, researchers created a frost-resistant tomato plant by adding an antifreeze gene from a cold-water fish to tomato. However, the research has not made substantive headway.
GM food experiments and trials in India
This story is from the May/June 2017 edition of Geography and You.
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This story is from the May/June 2017 edition of Geography and You.
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PAUSE AND REBOOT
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Former Professor of Economics and Education, School of Social Sciences, Jawaharlal Nehru University, New Delhi. bkhadria@gmail.com.
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