CRISPR to Climate Resilience: Breakthroughs in Agri-Biotech for Sustainable Farming Volume 62- Issue 1

Devendra Pratap Singh^1,2, Vandana Sharma² and Neelam Atri¹*

• ¹Department of Botany, Banaras Hindu University, Varanasi, India, 221005
• ²Division of Genetics, ICAR-IARI, New Delhi, 110012

Received: May 13, 2025; Published: May 21, 2025

*Corresponding author: Neelam Atri, Department of Botany, Banaras Hindu University, Varanasi, India

DOI: 10.26717/BJSTR.2025.62.009681

Abstract PDF

Climate change represents the most significant challenge to food security worldwide, as outcomes project a possible 30% reduction in the yield of crops in 2050 through elevated temperatures, irregular rain patterns, and enhanced pest infestations (Myers, et al. [1]). India, a densely populated country of 1.4 billion individuals and highly reliant on monsoon-based farming, is highly vulnerable. While traditional breeding techniques are instrumental, they tend to move too slowly to keep up with the rapidly changing climatic conditions. To counter this scenario, biotech tools in the modern sense, particularly CRISPR-Cas9 gene editing, have proved to occupy a revolutionary role in the production of climate-resistant crops. This article discusses how the application of CRISPR and other biotech advances holds the potential to provide a boost to sustainable farming in India and other vulnerable countries.

What is CRISPR?

CRISPR, or Clustered Regularly Interspaced Short Palindromic Repeats, is an innovative gene-editing technique adopted from bacteria’s natural defense system. It enables to making highly accurate and specific modifications in an organism’s DNA. Utilizing the Cas9 enzyme, it can remove, replace, or insert genes of a target associated with RNA that guides the Cas9 to the target gene location. It is considered particularly useful for creating crops that can tolerate climate change, and one of its leading edges is that it does not introduce foreign DNA, bypassing some of the regulatory challenges of GMOs (Jaganathan, et al. [2]).

Applications in Agriculture

Drought Tolerance: The CRISPR technique provides valuable insight for developing crops with better responses under low water availability. A classic case from India is the DTS1 rice variety developed by the ICAR-IIRR using the CRISPR system to edit certain genes controlling stomatal density. Through the regulation of stomatal conductance, the plant optimizes its water use by balancing water loss with productivity under drought (ICAR-IIRR [3]). In wheat, editing of the DREB gene family involved in the regulation of drought-responsive pathways increases resilience by maintaining physiological activity under water stress (Mei, et al. [4]).

Disease Resistance: CRISPR is also a key in the control of plant diseases. Another CRISPR-modified rice variety from ICAR-IIRR, DRR Dhan Kamal, provides resistance to bacterial leaf blight (BLB), a serious yield-limiting disease. This was done by modifying or editing susceptibility genes (S genes) so that the pathogen could not capture the plant immunity (ICAR-IIRR [3]). CRISPR-edited wheat mutant lines of TaMLO and TaEDR1 with mutated disease resistance genes manifested strong resistance to powdery mildew and other pathogens. (Zhang, et al. [5]).

Yield Stability Under Stress: Yield stability is significantly low under stress conditions. CRISPR has also opened the way to multigene editing in rice, such as the triple editing of Gn1a (grain number), DEP1 (panicle density), and GS3 (grain size), which led to a simultaneous increase of yield-related traits (Li, et al. [6]). In wheat, engineered genes such as TaGW2 (grain weight) and TaARE1 (nitrogen-use efficiency) have been reported to generate improved performance detection with stable yields under adverse environment (Wang, et al. [7]).

Accelerated Breeding: CRISPR has one particularly appealing asset in its favor, i.e., speed. Conventional breeding for stress traits requires 8–10 years, while CRISPR allows direct and heritable gene edits that produce comparable results within 2–3years (Chen, et al. [8]). Furthermore, with CRISPR, linked drag and repeated backcrossing will not be necessary, and introgression of the desired trait would be accelerated and improved. That momentum is also evident from recent progress in Indian labs. Unlike transgenic techniques, which met with public and regulatory opposition, crops like DTS1 and DRR Dhan Kamal do not contain foreign genes and involve a lesser amount of tinkering with the native sequence of genes and are akin to natural mutations.

The Biotech Toolbox for Resilience CRISPR is the most promising genome editing technique, but it is not the only powerful biotech tool. Other methods, including RNA interference, synthetic biology, and gene drives, are additionally lending substantial capabilities to build climate-resilient, sustainable farming systems. Such techniques provide new approaches for controlling pests, nutrient management ecological balance, which in the context of Indian agriculture carries a lot of significance.

RNA Interference (RNAi)

Silencing the Enemy Within- RNA interference (RNAi) is a gene-silencing mechanism that can knock down the expression of genes by degrading the mRNA. In agriculture, it can be applied to silence genes in pests or pathogens that help the plant to resist infection without the need for chemical pesticides.An RNAi-mediated brinjal is under field trial in India. It has the potential to control the fruit and shoots borer (Leucinodes orbonalis), which is a major insect pest in vegetables, responsible for serious yield loss. By the suppression of indispensable genes in the pest by plant-derived RNA molecules, this technique inhibits infestations, and also provides an ecological option for insecticides (Reddy, et al. [9]).

Synthetic Biology and Biofertilizers

Engineering the Soil Microbiome- Synthetic biology facilitates the creation of tailored microbe-based solutions that grow plants, reduce our reliance on chemical inputs, and support soil health. In the country, institutions like the Tamil Nadu Agricultural University (TNAU) and the Indian Institutes of Technology (IITs) are leading the way in engineering symbiotic microorganisms to improve biological nitrogen fixation in major crops like rice and sugarcane. These synthetic microbes are a new generation of biofertilizer, substituting for the use of urea and other synthetic sources of nitrogen. This is of special importance in low-input or resource-poor farming systems where excessive use of fertilizers can result in soil and water quality degradation. Improved microbial biofertilizers not only increase productivity but also make an important contribution to sustained productivity and climate resilience by reducing greenhouse gas emissions from the manufacturing and usage of fertilizers (Singh, et al. [10]).

Gene Drives

Promise and Precaution in Pest Control- Gene drives are an engineering technique for spreading a given gene throughout a population with utmost urgency. It can also be used to counter or transform pest species, which can reduce their impact on farming. One known target for study globally is the fall armyworm, which is an invasive species of insect that causes great damage to crops like maize. Although gene drives have yet to be released into Indian agriculture, they are being explored under rigorous regulatory and bioethics regimes to create future applications. Researchers are considering ecological risk, reversibility, and measures of containment to ensure that any application meets standards of biosafety and environmental conservation goals (Esvelt, et al. [11]). Gene drives, properly developed, would provide an efficient, precise means of managing invading species without repeated chemical treatments.

Innovation and Policy Synergy The future of sustainable agriculture does not just depend upon scientific advancements but also upon linking the developments with supportive policy systems, public confidence, and building capacities. With Agri-biotechnology advancing very quickly, India can take the lead with innovation and inclusive governance.

Emerging Tools

The Next Frontier in Crop Improvement- The generation of future genome engineering technologies and digital technologies is expected to increase precision, efficiency, and accessibility to agricultural biotechnology.

Prime Editing: A refinement over standard CRISPR, prime editing enables very accurate DNA editing with no introduction of double- strand breaks. This minimizes the risk of side effects and opens the potential for fixing complicated mutations in crops with increased security and precision (Anzalone, et al. [12]).

AI-Supported Crop Design: Machine learning and Artificial Intelligence are revolutionizing crop research with the identification of alleles and gene networks, which are resistant to stresses. Indian bioinformatics laboratories at the Indian Institute of Science (IISc) and ICRISAT are using AI models for genome-wide linkage maps in crops like chickpea and pigeon pea, which can enhance the breeding process through quicker and data-driven breeding strategies (Varshney, et al. [13]). These technologies, when coupled with traditional breeding and farmer expertise, provide robust solutions to make agriculture resilient to climate stresses.

Policy Recommendations

Building a Responsive and Inclusive Framework- For science to have an impact, it needs to have supportive policies that are responsive to promoting innovation while safeguarding public interest and environmental values. The following are essential to the achievement of that aim:

Tiered, Time-Based Approvals: Implement a tiered approval system dependent upon risk and novelty of the genetic edit. Accelerated approval for public-benefit traits like drought tolerance or nutritional improvement created by public institutions.

Finance Open-Source Bio Platforms: Provide funds to create open-source, publicly funded biotechnology platforms that can support small and medium-sized research centers and start-ups. This would enable poor farmers to gain power through the democratization of technology and the avoidance of proprietary bottlenecks.

Foster Interdisciplinary Development: Establish national training programs to educate young experts in Agri-genomics, policy, ethics, and field-level application. Closing gaps among lab science, regulation, and application in the real world is critical to ensuring effective biotech take-up. These initiatives have the potential to develop an environment where technology, policy, and trust co-evolve, allowing all farmers and all fields to gain the benefits of biotechnology.

The advancement of Agri-biotechnology, especially genome editing technologies like CRISPR, comes with ethical and regulatory considerations that must be carefully addressed to ensure public acceptance and environmental safety. India’s policy framework for genome-edited plant varieties is dynamically changing according to advancing science. A significant policy realignment in 2022, when the Ministry of Environment, Forest, and Climate Change (MoEFCC) provided directions differentiating between genome editing and classical genetic modification. In particular, genome editing carried out with the help of Site-Directed Nuclease technologies (SDN-1 and SDN-2), which do not involve foreign DNA introduction, is exempt from strict GMO regulations (GEAC [14]). These exemptions, though, still need developers to comply with biosafety standards and present data to respective regulatory authorities for transparency and traceability.

Biodiversity and Biosafety

A Delicate Balance India is both an origin and diversity center for many of these crops, such as rice, brinjal, and millets. Preservation of biodiversity is, therefore, an important issue. Accidental gene flow from the germline-modified crops into their relatives in the wild can disturb ecosystems or dilute landraces. Additionally, genome editing, though precise, is not risk-free. Possible off-target effects, epigenetic alterations, or long-term ecological effects need to be rigorously evaluated. Maintaining biosafety is not just a regulatory but also a societal and environmental imperative for a nation that is reliant on its agrobiodiversity for livelihood, food, and culture.

Public Perception

Trust Through Communication- In addition to sustaining scientific advancements, there are still enormous public false perceptions regarding GMOs and gene-modified crops. Misinformation, ethics, and lack of knowledge are common factors that fuel such resistance, particularly among rural populations, where biotechnology literacy is particularly poor. To establish public trust, there needs to be good science communication strategies. Clear communication of the difference between gene editing and transgenics, and how gene editing can contribute to food security and sustainability, is essential to public acceptance.

CRISPR and other biotechnology tools have the potential to transform agriculture into climate-resilient farming. For India, these technologies provide timely interventions—from drought-resistant rice to pest-management crops—capable of ensuring livelihoods and food security. With the country’s robust research foundation and growing policy support, India can take the lead in sustainable Agri-biotech. The challenge is no longer one of adoption, but of making it responsibly, inclusively, and with all due haste, so their benefits are equitably available to all the world’s farmers while ensuring public trust and protecting biodiversity.

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