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Dual-Stress Mitigation of Sclerotinia under Microplastic Toxicity by Nano-Selenium: Redox Balance, Pathogen Suppression, and Transcriptome Reprogramming
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Researchers investigated whether selenium nanoparticles could protect rapeseed plants from combined stress caused by microplastics and the fungal pathogen Sclerotinia. The study found that selenium nanoparticles improved photosynthesis, reduced oxidative damage, and showed strong antifungal activity, suggesting they may help mitigate microplastic-induced phytotoxicity and fungal disease in agricultural settings.
Microplastics (MPs) andSclerotinia sclerotiorum (HP) impair plant growth; however, their combined effects and selenium nanoparticles (SeNPs) mitigation remain unclear. This study assessed SeNPs' protective role in rapeseed (Brassica napus L.) under combined biotic-abiotic stress using physiological, biochemical, and transcriptomic analyses. SeNPs enhanced seed germination and vigor, whereas MPs reduced the rate of growth. Co-application of SeNPs with MPs alleviated stress by improving photosynthesis, chlorophyll, nitrogen assimilation, and leaf moisture. SeNPs showed strong antifungal activity against S. sclerotiorum (EC50 = 9.15 mg/L), resulting in hyphal distortion and reducing the secretion of cellulase, polygalacturonase, and oxalic acid. Under combined stress, SeNPs decreased ROS and lipid peroxidation, modulated H2O2, and enhanced antioxidant enzymes, glutathione, and PAL. Transcriptomic analysis revealed that SeNPs restored photosynthetic and defense-related gene expression, modulated MAPK signaling, and enhanced redox balance. Overall, SeNPs mitigate MP-induced phytotoxicity and fungal pathogenicity, highlighting their regulatory potential and the need to consider health risks from environmental MP exposure.
More Papers Like This
Dual-Stress Mitigationof Sclerotinia under MicroplasticToxicity by Nano-Selenium: Redox Balance, Pathogen Suppression, andTranscriptome Reprogramming
AI summary Read the abstract
Researchers tested whether selenium nanoparticles (SeNPs) could protect rapeseed plants from the combined stress of microplastic contamination and Sclerotinia sclerotiorum fungal infection. SeNPs improved seed germination, reduced oxidative damage, and altered gene expression to restore redox balance — largely reversing the dual stress effects.
Selenium alleviates the adverse effects of microplastics on kale by regulating photosynthesis, redox homeostasis, secondary metabolism and hormones
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Researchers found that treating soil with selenium could protect kale plants from the harmful effects of microplastic contamination. Microplastics triggered damaging oxidative stress in the plants, but selenium helped restore the balance by boosting antioxidant defenses, improving photosynthesis, and regulating plant hormones. This suggests selenium supplementation could help maintain food crop health in microplastic-contaminated agricultural soils.
Ultrastructural and Proteomic Analyses Revealed the Mechanism by Which Foliar Spraying of Se Nanoparticles Alleviated the Toxicity of Microplastics in Pistia stratiotes L.
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Foliar application of selenium nanoparticles to the aquatic plant Pistia stratiotes alleviated toxicity from polyethylene nanoplastics, with ultrastructural and proteomic analyses revealing that selenium nanoparticles protected photosynthetic machinery and antioxidant systems.
Revealing the Selenium-Mediated Regulatory Mechanisms of P. stratiotes in Response to Nanoplastics Stress from Multiple Perspectives of Transcriptomics, Metabolomics, and Plant Physiology
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Scientists found that tiny plastic particles (nanoplastics) seriously damage water plants by disrupting their ability to make food from sunlight and causing harmful stress inside their cells. However, when researchers added selenium (a natural mineral) to the water, it helped protect the plants from plastic damage by boosting their natural defense systems. This research could help us clean up plastic pollution in lakes and rivers, which is important since these water sources can affect human health through drinking water and food chains.
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