Tiny nitric oxide capsules help lettuce shrug off salty soil
Berríos D, Fincheira P, Rodríguez R, Benavides-Mendoza A, Inostroza-Blancheteau C
Crop Improvement
If you've ever watched container plants struggle after well water or road salt runoff leaves soil salty, this points to a spray-on trick that could help edible greens power through it.
Researchers built microscopic capsules out of chitosan, a biodegradable material derived from shellfish shells, and packed them with a compound that slowly releases nitric oxide, a gas that helps plants cope with stress. When they sprayed these capsules on lettuce growing in salty water, the plants grew significantly bigger and healthier than untreated lettuce, keeping their photosynthesis running normally even under heavy salt stress. The lettuce also built up more protective compounds, meaning the treated greens may have ended up more nutritious too.
Key Findings
Nanoparticles measured 129 nm with a stable -33.3 mV charge and released nitric oxide steadily over 20 hours
Under severe salinity (2 g/L NaCl), 50-100 μM treatment increased fresh biomass by up to 19% and dry biomass by up to 56.7%
Treated plants maintained photosynthesis, stomatal conductance, and water-use efficiency near non-stressed levels while boosting proline, antioxidants, flavonols, and hydroxycinnamic acids
chevron_right Technical Summary
Scientists coated tiny nitric oxide-releasing capsules in chitosan (a biodegradable material from shellfish shells) and sprayed them on lettuce grown in salty water. The treated lettuce grew up to 56% more biomass and stayed healthier than untreated plants under salt stress, offering a possible tool for farming in increasingly saline soils.
Abstract Preview
Original paper
Chitosan-based nanocarriers for controlled nitric oxide delivery improve physiological performance and stress tolerance in lettuce under saline irrigation.
Biodegradable chitosan nanoparticles have emerged as nanocarriers for the controlled delivery of bioactive molecules in agricultural systems. In this study, S-nitrosoglutathione-loaded chitosan nan...
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