Efficient nanostructured materials to reduce nutrient leaching to overcome environmental contaminants

Area of Science:

• Agricultural Science
• Plant Physiology
• Nanotechnology

Background:

• Nutrient leaching from agricultural applications contaminates freshwater resources.
• Menthol, a key compound in Mentha arvensis L., is a globally traded essential oil with significant economic importance.
• Developing sustainable methods for menthol production is crucial for local economies and environmental protection.

Purpose of the Study:

• To investigate the efficacy of nano-structured plant growth regulators (PGRs), specifically 28-homobrassinolide and ethephon, in enhancing essential oil and menthol content in Mentha arvensis L.
• To evaluate PGR nano-formulations with reduced leaching potentials as an eco-friendly approach.
• To characterize the physicochemical properties of the prepared nano-formulations.

Main Methods:

• Synthesis and characterization of nano-structured PGRs (28-homobrassinolide and ethephon) using techniques like FTIR, LIBS, DSC-TGA, SEM, AAS, and Zeta potential analysis.
• Application of nano-formulations to Mentha arvensis L. plants.
• Quantification of essential oil and menthol content using modified spectrophotometric and gas chromatographic (GC) methods.

Main Results:

• Nano-formulations of 28-homobrassinolide and ethephon significantly increased essential oil yield compared to control and blank treatments.
• Application of specific nano-formulations, such as ethephon-Zn-NPs-L-II and 28-homobrassinolide-Ca-NPs-L-III, resulted in the highest menthol percentages (up to 81.93% and 80.84%, respectively).
• The nano-structured PGRs demonstrated potential for reduced nutrient leaching.

Conclusions:

• Nano-structured plant growth regulators offer a promising strategy to enhance Mentha arvensis L. essential oil and menthol production.
• The developed nano-formulations show potential for sustainable agriculture by improving crop yield and potentially reducing environmental impact.
• Further research into the application and long-term effects of these nano-PGRs is warranted.