Green synthesis of sulfur nanoparticles using Ocimum basilicum leaves and its prospective effect on manganese-stressed Helianthus annuus (L.) seedlings
| Autor: | Khalil M. Saad-Allah, Gehad A. Ragab |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
food.ingredient
Proline Health Toxicology and Mutagenesis 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences Photosynthesis 01 natural sciences chemistry.chemical_compound food Betaine Helianthus annuus Particle Size 0105 earth and related environmental sciences 021110 strategic defence & security studies Manganese Chemistry Plant Extracts Public Health Environmental and Occupational Health Basilicum food and beverages Water Green Chemistry Technology General Medicine Pollution Plant Leaves Horticulture Osmolyte Seedlings Shoot Ocimum basilicum Helianthus Nanoparticles Osmoprotectant Sulfur |
| Zdroj: | Ecotoxicology and environmental safety. 191 |
| ISSN: | 1090-2414 |
| Popis: | A novel green approach was utilized to fabricate sulfur nanoparticles (SNPs) with the aid of Ocimum basilicum leaves extract. The effective formation of the synthesized SNPs was examined and approved using UV–visible spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and Fourier transform infrared (FT-IR) spectroscopy. The average particle size was 23 nm with spherical shape and crystalline in nature. In the pot experiment, the synthesized SNPs were applied with different concentrations (12.5, 25, 50, 100 and 200 μM) as pre-soaking to Helianthus annuus seeds and irrigated with 100 mM MnSO4. As a result of manganese (Mn) exposure, the harvested 14-day sunflower seedlings showed a significant decline in the growth parameters (shoot length, leaf area and the relative water content of both shoot and root), photosynthetic pigments, mineral content (N, P, K, Ca, and Mg), and protein content compared to the control. The root length, electrolyte leakage, Na and Mn levels, metabolites content (amino acids, protein, glycine betaine, proline, and cysteine) were greatly raised as affected by Mn stress. Mn toxicity reduction using SNPs was demonstrated, as the medium doses enhanced seedlings growth, photosynthetic pigments, and mineral nutrients. Application of SNPs decreased Mn uptake and enhanced S metabolism through increasing cysteine level. Likewise, SNPs elevated seedlings water content and eliminated physiological drought via increasing osmolytes such as amino acids and proline. It can be concluded that green-synthesized SNPs had the potential to limit the deleterious effects of Mn stress. |
| Databáze: | OpenAIRE |
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