Nano-wrapped melatonin helps wheat survive salty soil
Algopishi UB, Alshegaihi RM, Khan MN, Fayad E, Alqurashi M
Crop Improvement
If you've ever watched a plant near a de-iced sidewalk or a coastal garden bed wilt and yellow from salt buildup, this points to a treatment that could someday protect crops (and maybe garden plants) from that same stress.
Salty soil is tough on plants because it throws off their water balance and floods their cells with sodium while starving them of potassium. Researchers wrapped melatonin, a hormone-like compound plants already use to cope with stress, inside microscopic chitosan particles and fed it to wheat growing in salty conditions. The wrapped version worked much better than melatonin or chitosan alone, helping the wheat grow taller, keep its leaves greener, pump out sodium more effectively, and ramp up its own antioxidant defenses.
Key Findings
MLT-CSNP treatment increased plant height by 40.6% and shoot dry weight by 85.5% compared to salt-stressed plants
Sodium accumulation dropped by 56.5% and the Na+/K+ ratio fell from 2.01 to 0.38
H2O2 and MDA (oxidative damage markers) decreased by 59.8% and 56.6%, while antioxidant enzymes SOD, CAT, POD, and APX activity increased alongside upregulation of TaHKT1;5, TaSOS1, TaNHX1, and miR398 genes
chevron_right Technical Summary
Coating melatonin in tiny chitosan particles and giving it to salt-stressed wheat boosted growth by over 40%, cut sodium buildup by more than half, and switched on the plant's internal defense genes far better than either ingredient alone.
Abstract Preview
Original paper
Chitosan-melatonin nanobiopolymer regulates miR398-mediated antioxidant defense and TaHKT1;5-SOS-NHX ion-homeostasis networks to enhance wheat salt tolerance.
In recent years, the application of nanobiomaterials and phytohormone-based nano-delivery systems has gained considerable attention for enhancing plant tolerance to abiotic stresses. Among these ap...
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