Explain by Giving Two Examples, How Biotechnology Has Helped the Indian Farmers in Processing Their Perishable Crops
A complete, examiner-standard 150-word model answer for the UPSC Mains 2026 GS Paper 3 question on agricultural biotechnology — with a process chain on the ethylene pathway, exactly two developed examples, static core content, and the rise in processed food's share of agri-exports from 13.7% to 20.4% as the outcome anchor.
"Two examples" is an instruction, not a suggestion. Four shallow examples score below two developed ones — and the word "processing" narrows this further: the question is about what happens after harvest, not about Bt cotton or pest resistance.
Explain by giving two examples, how biotechnology has helped the Indian farmers in processing their perishable crops. (Answer in 150 words)
Model Answer
Introduction
Perishable crops — fruits, vegetables and horticultural produce — lose value between harvest and processing because ripening, softening and microbial spoilage continue after the crop leaves the field. Biotechnology intervenes at exactly this point, either by slowing the biological clock or by supplying the enzymes that make processing commercially viable.
Body
Harvest
Climacteric fruit continues to respire and ripen
Ethylene Surge
ACC synthase and ACC oxidase drive ripening
Softening
Cell-wall enzymes degrade texture; spoilage sets in
Intervention
Gene silencing delays it; enzymes redirect it into product
- The mechanism — antisense RNA and RNA interference are used to down-regulate the genes controlling ethylene biosynthesis, chiefly ACC synthase and ACC oxidase, and the cell-wall enzyme polygalacturonase that causes softening.
- The crops — tomato was the model system and the approach has since been extended to climacteric fruits central to Indian horticulture, including banana, where silencing of ripening-associated MADS-box genes has produced extended shelf life in research trials.
- The benefit to the farmer — a longer window between harvest and processing means produce can reach a distant processing unit or export market instead of being sold at a distress price to whoever is nearest. It converts a perishable into something closer to a storable.
- The mechanism — microbial enzymes produced by fermentation, principally pectinases and cellulases, break down pectin and cell-wall material during pulping. This raises juice extraction yield, clarifies the product and shortens processing time.
- A distinctly Indian case — Kinnow mandarin, grown extensively in Punjab, Haryana and Rajasthan, long resisted commercial juice processing because limonin and naringin made the juice bitter. Enzymatic debittering using recombinant α-L-rhamnosidase addresses precisely this constraint, opening a processing route for a crop that otherwise had to be sold fresh within days.
- The benefit to the farmer — where an enzyme makes processing viable, the grower acquires a second buyer. Competition between the fresh market and the processor is itself a price-support mechanism, and it absorbs the grades that fresh retail rejects.
- The measurable shift — the share of processed food in India's agricultural exports rose from 13.7% in 2014-15 to 20.4% in 2024-25, with total agri-exports moving from about USD 32 billion to USD 55 billion. The direction of travel is from commodity to product.
- The regulatory reality — India has approved no genetically modified food crop for commercial cultivation. Much delayed-ripening work therefore remains at research or confined-trial stage, and the 2022 exemption of certain genome-edited plants (SDN-1 and SDN-2) from GEAC approval is the change most likely to alter that.
- Enzymes carry no such burden — because the enzyme is a processing aid rather than a modified crop, this route has delivered farm-level benefit far faster than transgenic approaches. That asymmetry is the honest verdict on where Indian biotechnology has actually helped.
Conclusion
Biotechnology has helped Indian farmers with perishables along two distinct routes — extending the time available before processing, and making processing itself technically and commercially feasible. The second has delivered more, sooner, because it sits outside the transgenic regulatory bottleneck. Realising the first at scale depends less on further laboratory advance than on a settled regulatory pathway and the cold chain to carry the gain.
Techniques and regulation: Distinguish clearly between recombinant DNA technology, antisense and RNAi gene silencing, genome editing (CRISPR-Cas9, with the SDN-1/SDN-2/SDN-3 classification), tissue culture and micropropagation, and industrial or fermentation biotechnology. On the regulatory side, revise the Genetic Engineering Appraisal Committee under the Environment (Protection) Act 1986 and the 1989 Rules, the Review Committee on Genetic Manipulation under the Department of Biotechnology, FSSAI's role for processed food, and the 2022 exemption of SDN-1 and SDN-2 genome-edited plants from GEAC clearance. Know the Bt cotton approval, the Bt brinjal moratorium of 2010 and the litigation around GM mustard as the three reference points of India's GM policy.
Post-harvest and processing ecosystem: ICAR-CIPHET and ICAR-IIHR on post-harvest technology; the Ministry of Food Processing Industries and Pradhan Mantri Kisan SAMPADA Yojana; the PLI Scheme for Food Processing; Operation Greens for tomato, onion and potato; Mission for Integrated Development of Horticulture; the Agriculture Infrastructure Fund and the Clean Plant Programme for disease-free planting material. Also revise the wider farm applications of biotechnology — biofertilisers, biopesticides, marker-assisted selection and biofortification — so you can place processing in context without drifting into it.
Answer Writing Tips for This Question
- Give exactly two examples and develop both. The stem specifies the number. Offering five in two lines each is the commonest way to lose marks here — the examiner is checking depth, and the instruction tells you where to spend your words.
- "Processing" is the operative word. Bt cotton, pest resistance, drought tolerance and biofortification are all biotechnology, and all wrong for this question. Every line should sit somewhere between harvest and finished product.
- Name the enzymes and the genes. ACC synthase, ACC oxidase, polygalacturonase; pectinase, cellulase, α-L-rhamnosidase. Precise nomenclature in a science question does what naming an Article does in a polity one — it demonstrates the knowledge is real.
- Pick one distinctly Indian case. Kinnow debittering is far stronger than a generic reference to Flavr Savr tomato, because it names an Indian crop, an Indian growing region and a real commercial constraint the technology removed.
- Acknowledge the regulatory position honestly. No GM food crop is approved for commercial cultivation in India, so much delayed-ripening work remains pre-commercial. Writing as though transgenic perishables are already in farmers' fields is a factual error an examiner in this subject will catch.
- Close on the asymmetry between the two routes. Enzyme technology has delivered at farm level because it escapes the transgenic approval process; gene silencing has not. Explaining why one worked faster than the other is analysis, and it is what the word "explain" was asking for.
