We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Melatonin Alleviates Antimony Toxicity by Regulating the Antioxidant Response and Reducing Antimony Accumulation in Oryza sativa L.
Summary
Researchers investigated whether melatonin, a natural antioxidant compound, could help rice plants cope with toxic antimony contamination. They found that applying melatonin reduced antimony uptake, decreased oxidative damage, and improved rice growth under antimony stress conditions. The study suggests that melatonin treatments could be a practical strategy for growing rice in soils contaminated with heavy metals.
Antimony (Sb) is a hazardous metal element that is potentially toxic and carcinogenic. Melatonin (MT) is an indole compound with antioxidant properties that plays an essential role in plant growth and alleviates heavy metal stresses. Nevertheless, little is known about the effects and mechanisms of exogenous MT action on rice under Sb stress. The aim of this experiment was to explore the mechanism of MT reducing Sb toxicity in rice via hydroponics. The results showed that Sb stress significantly inhibited the growth of rice, including biomass, root parameters, and root viability. Exogenous MT obviously alleviated the inhibition of Sb stress on seedling growth and increased biomass, root parameters, and root viability by 15-55%. MT significantly reduced the total Sb content in rice and the subcellular Sb contents in roots by nearly 20-40% and 12.3-54.2% under Sb stress, respectively. MT significantly decreased the contents of malondialdehyde (MDA, by nearly 50%), ROS (H2O2 and O2·-, by nearly 20-30%), and RNS (NO and ONOO-) in roots under Sb stress, thus reducing oxidative stress and cell membrane damage. Furthermore, MT reversed Sb-induced phytotoxicity by increasing the activities of antioxidant enzymes (SOD, POD, CAT, and APX) by nearly 15% to 50% and by regulating the AsA-GSH cycle. In conclusion, this study demonstrates the potential of MT to maintain redox homeostasis and reduce Sb toxicity in rice cells, decreasing the content of Sb in rice and thereby alleviating the inhibition of Sb on rice growth. The results provided a feasible strategy for mitigating Sb toxicity in rice.
Sign in to start a discussion.
More Papers Like This
Reclaiming multi-contaminated soil: melatonin alleviates cadmium and microplastic toxicity to restore rice growth and yield
Researchers investigated whether melatonin could mitigate the combined toxicity of cadmium and microplastics in agricultural soils to restore rice growth and yield. The study found that melatonin treatment modulated plant physiological function, reduced cadmium uptake, and improved soil properties, offering a promising approach to help crops withstand multi-contaminant stress from both heavy metals and microplastics.
Exogenous Melatonin Application Alleviates Microplastics and Cadmium‐Induced Phytotoxicity in Maize ( Zea mays L.) Plants: Insights From Physiological and Metabolomic Analyses
Researchers investigated whether exogenous melatonin could alleviate the combined phytotoxicity of microplastics and cadmium in maize plants. The study found that melatonin application reduced oxidative damage and improved plant growth under co-contamination stress, suggesting that melatonin may serve as a biostimulant to help crops cope with the increasingly common co-occurrence of microplastics and heavy metals in agricultural soils.
Melatonin-Mediated Abiotic Stress Tolerance in Plants
This review examines how melatonin, a molecule found in all living organisms, helps plants cope with environmental stresses like drought, extreme temperatures, salinity, and heavy metal contamination. Researchers found that melatonin works by neutralizing harmful reactive oxygen species and activating plant defense pathways. The study suggests that melatonin-based treatments could help improve crop resilience in the face of increasing environmental challenges, including soil pollution.
Melatonin reduces nanoplastic uptake, translocation, and toxicity in wheat
Researchers investigated whether melatonin could reduce the harmful effects of polystyrene nanoplastics on wheat plants. They found that melatonin application significantly decreased nanoplastic uptake by roots and their transport to shoots by regulating aquaporin gene expression and activating antioxidant defense systems. The study suggests that melatonin may serve as a protective agent to help mitigate nanoplastic toxicity in crops.
Melatonin enhances salt tolerance in sorghum by modulating photosynthetic performance, osmoregulation, antioxidant defense, and ion homeostasis
Exogenous melatonin application was found to enhance salt tolerance in sorghum by improving photosynthetic performance and modulating antioxidant responses during salt stress. The findings suggest melatonin could be a practical tool for improving crop resilience under salinity conditions.