article · Journal of Sustainable Agricultural Sciences
Rising temperatures driven by climate change present a severe challenge to agriculture by causing physiological and biochemical damage to crops. This investigation examined whether foliar applications of nano-selenium could protect two heat-sensitive chrysanthemum cultivars exposed to high temperatures ranging from 39.5 to 41.6 degrees Celsius across two successive seasons. Applying graded doses of nano-selenium up to 200 milligrams per litre significantly improved heat tolerance. Treatments up to 150 milligrams per litre stimulated the activity of key antioxidant enzymes, specifically catalase and peroxidase, which help plants cope with stress. In addition, applications up to 200 milligrams per litre reduced polyphenol oxidase activity and limited electrolyte leakage, protecting cellular integrity. Ultimately, treating the plants with nano-selenium preserved cut flower quality and economic value under high temperatures, indicating that such treatments could help safeguard floral crops against warming conditions.
Heatwaves associated with climate change increasingly threaten agricultural productivity and floral crop quality. Demonstrating that foliar nano-selenium applications can bolster plant antioxidant systems and reduce tissue damage provides a potential agronomic strategy to protect vulnerable crops. This helps sustain commercial cut flower quality during high-temperature periods, offering valuable insight for managing climate-induced heat stress in sensitive ornamental plants.
The findings point to an applied horticultural treatment that commercial cut flower growers and nursery managers could use to mitigate heat damage during heatwaves. By improving floral quality and post-harvest economic value through foliar spraying, the approach has clear commercial relevance. Because testing occurred over two growth seasons on sensitive cultivars, the method appears applied and tested, though broader field evaluation and regulatory clearance for nano-selenium application would precede commercial adoption.
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Under climate change, the escalating in temperature is considered a serious challenge threaten the agricultural production. This production includes food, feed and all other human needs. These higher temperatures represent heat stress, which cause physiological and biochemical damages in cultivated plants. Nano-selenium (nano-Se) has distinguished features enhancing the cultivated plants under stress. These features include the high bioactivity of nano-Se, which ameliorate the growth of different cultivated plants under different abiotic and biotic stresses such as salinity, drought, waterlogging and heat stress. This study was carried out to investigate the ameliorative role of nano-Se on two sensitive chrysanthemum cultivars under high temperature stress (i.e., 39.5, 40.6 and 41.6℃). The growth of these cultivars, plant antioxidant system and floral attributes were investigated under graded nano-Se doses (i.e., 50, 100, 150 and 200 mg nano-Se L-1) during two successive growth seasons. The foliar application of nano-Se improved heat tolerance in chrysanthemum by enhancing the activities of antioxidant enzymes including catalase and peroxidase (up to 150 mg nano-Se L-1) and decreasing polyphenol oxidase and electrolyte leakage up to 200 mg nano-Se L-1. The nano-Se-treated cut chrysanthemum flowers under heat stress indicated the positive effects of nan-Se on improving of flower quality and the economic value. These results may confirm the definite roles of nano-Se in management the heat stress-induced adverse effects on not only cut chrysanthemum flowers but also other crops under climate change.
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DOI: 10.21608/jsas.2020.23905.1203
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