Chitosan Nanoparticle Applications in Sustainable Agriculture
Summary
Chitosan nanoparticles represent a convergence of natural biopolymer utility and nanotechnology, offering a sustainable toolkit for modern agriculture. Their biodegradability, non-toxicity and capacity to encapsulate agrochemicals underpin a range of applications including targeted delivery of fertilisers, pesticides and micronutrients, elicitation of plant defence mechanisms and improvement of seed treatments. By controlling release kinetics and enhancing adhesion to plant surfaces, chitosan nanoparticles can increase nutrient use efficiency, reduce leaching and lower the overall chemical load on ecosystems. Moreover, their inherent ability to trigger innate immune responses in crops provides a dual action of growth promotion and disease suppression, aligning with global goals for reduced environmental impact and enhanced food security.
Research from Nature Portfolio
Recent studies have shown that chitosan nanoparticles with elevated acetylation levels can confer systemic and durable resistance in pearl millet by stimulating nitric oxide-mediated defence pathways and upregulating key pathogenesis-related genes, effectively controlling downy mildew outbreaks. Investigations into copper-loaded chitosan formulations for maize have revealed synergistic benefits of disease control and growth enhancement, achieved through the induction of antioxidant and defence enzyme activities alongside a controlled copper-release profile. Foundational work on unmodified chitosan nanoparticles has demonstrated their role as potent immuno-modulators, provoking phenolic accumulation and defence gene expression via nitric oxide signalling, and offering a promising alternative to synthetic phytosanitary agents.
Chitosan Nanoparticle Applications in Sustainable Agriculture publication trend
The graph below shows the total number of articles in chitosan nanoparticle applications in sustainable agriculture across all publications each year (not limited to Nature Index journals).
Technical terms
Chitosan nanoparticle: A nanoscale particle composed of chitosan, used to deliver agrochemicals or elicit plant responses.
Ionic gelation: A synthesis method exploiting electrostatic interactions to form polymer-based nanoparticles without toxic solvents.
Controlled release: A mechanism by which active ingredients are released gradually over time to maintain efficacious concentrations.
Elicitation: The induction of plant defence responses by external agents, leading to enhanced immunity against pathogens.
References
- Chitosan nanoparticles having higher degree of acetylation induce resistance against pearl millet downy mildew through nitric oxide generation. Scientific Reports (2018).
- Cu-chitosan nanoparticle boost defense responses and plant growth in maize (Zea mays L.). Scientific Reports (2017).
- Chitosan nanoparticles: A positive modulator of innate immune responses in plants. Scientific Reports (2015).
- Chitosan Nanoparticles-Based Ionic Gelation Method: A Promising Candidate for Plant Disease Management. Polymers (2022).
- Chitosan-Based Agronanochemicals as a Sustainable Alternative in Crop Protection. Molecules (2020).
- Mechanism of Plant Growth Promotion and Disease Suppression by Chitosan Biopolymer. Agriculture (2020).
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