Publication: Investigation on plant growth and toxicity effects of zno nanofertilizer synthesized by green synthesis method
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Date
2024-08-01
Authors
Desmond Hoong Leng Kit
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Abstract
Synthetic fertilizers are causing a lot of negative impacts on environment and health. Zinc oxide nanoparticles (ZnO nanoparticles) have gained attention in past years by researchers worldwide for their capacity to boosts the yield and growth of crops while minimizing the environmental impact. Hence, a study utilizing number of leaves, shoot and root length, fresh and dry weight, chlorophyll and carotenoid content, total phenolic content, total flavonoid content and ascorbate peroxidase activity was conducted in Capsicum Annuum by varying the concentrations of ZnO nanofertilizers. Green ZnO nanoparticles were synthesized using C. Gigantea leaves and characterized using XRD, FESEM and FTIR. The Capsicum Annuum plants were exposed to the nanofertilizers at concentration of 0 ppm (control), 50 ppm, 100 ppm and 150 ppm to determine the effect of concentration on the growth and toxicity effect of the plants for a duration of 55 days. Foliar application was utilized in delivering the nanofertilizers to the plants. It was found that 150 ppm enhances the number of leaves, shoot and root length and fresh and dry weight of the plant. Antioxidant activity has been observed at high concentration, especially 150 ppm with the highest antioxidant activity. The secondary metabolism of the Capsicum Annuum plant is low at 150 ppm, this indicates that the plant might be relocating its resources to reduce the effect of the oxidative stress experienced by the plant. This result demonstrates the potential of green synthesized ZnO nanoparticles as effective nanofertilizers, while emphasizing the need for careful dosage control to ensure a safe and beneficial application in crop production