Foliar spraying melatonin reduces the threat of chromium-contaminated water to wheat production by improving photosynthesis, limiting Cr translocation and reducing oxidative stress
Chromium (Cr)-contaminated in irrigation water poses a significant threat to the safety of wheat (Triticum aestivum L.) production safety. Recent studies suggest that melatonin (MT) could enhance crop tolerance to Cr pollution. This study aimed to investigate the effects of foliar spraying MT on all...
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Elsevier
2025-01-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651324015616 |
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| author | Chuanjiao Sun Libing Xu Qiang Gao Shuzhen Sun Xiaoxue Liu Zigang Zhang Zhongwei Tian Tingbo Dai Jianyun Sun |
| author_facet | Chuanjiao Sun Libing Xu Qiang Gao Shuzhen Sun Xiaoxue Liu Zigang Zhang Zhongwei Tian Tingbo Dai Jianyun Sun |
| author_sort | Chuanjiao Sun |
| collection | DOAJ |
| description | Chromium (Cr)-contaminated in irrigation water poses a significant threat to the safety of wheat (Triticum aestivum L.) production safety. Recent studies suggest that melatonin (MT) could enhance crop tolerance to Cr pollution. This study aimed to investigate the effects of foliar spraying MT on alleviating Cr toxicity and accumulation in wheat irrigated with K2Cr2O7 solution at concentrations of 5, 10, and 20 mg/kg Cr in the soil. Our results showed that Cr-contaminated water irrigation significantly reduced dry weight, grain numbers, grain weight, yield, harvest index, net photosynthetic rate (Pn), maximum and actual photochemical efficiency of photosystem II (Fv/Fm and ΦPSII), chlorophyll contents, and the a/b ratio. It also increased PSII photodamage and oxidative stress in wheat leaves, resulting in high Cr accumulation in roots, leaves, and grains. Foliar spraying of MT alleviated Cr toxicity by improving Pn, Fv/Fm, and ΦPSII, enhancing chlorophyll content, promoting dry matter accumulation and yield, and reducing oxidative stress and Cr translocation. Furthermore, MT application enhanced transcriptional regulation, alleviated oxidative stress by boosting antioxidant enzyme activities, and restricted Cr translocation from roots to leaves and grains by increasing the accumulation of secondary metabolites, such as lignin and metallothionein. These findings suggest that MT application could serve as a viable strategy for reducing Cr contamination in cereals and supporting phytoremediation efforts. |
| format | Article |
| id | doaj-art-22035adb0198439fb670ed9cdd1315fe |
| institution | Kabale University |
| issn | 0147-6513 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj-art-22035adb0198439fb670ed9cdd1315fe2025-02-12T05:29:23ZengElsevierEcotoxicology and Environmental Safety0147-65132025-01-01290117485Foliar spraying melatonin reduces the threat of chromium-contaminated water to wheat production by improving photosynthesis, limiting Cr translocation and reducing oxidative stressChuanjiao Sun0Libing Xu1Qiang Gao2Shuzhen Sun3Xiaoxue Liu4Zigang Zhang5Zhongwei Tian6Tingbo Dai7Jianyun Sun8Key Laboratory of Crop Physiology Ecology and Production Management of Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, PR ChinaKey Laboratory of Crop Physiology Ecology and Production Management of Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, PR ChinaKey Laboratory of Crop Physiology Ecology and Production Management of Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, PR ChinaKey Laboratory of Crop Physiology Ecology and Production Management of Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, PR ChinaKey Laboratory of Crop Physiology Ecology and Production Management of Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, PR ChinaCollege of Life Sciences Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, PR ChinaKey Laboratory of Crop Physiology Ecology and Production Management of Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, PR ChinaKey Laboratory of Crop Physiology Ecology and Production Management of Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, PR ChinaCollege of Life Sciences Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, PR China; Corresponding author.Chromium (Cr)-contaminated in irrigation water poses a significant threat to the safety of wheat (Triticum aestivum L.) production safety. Recent studies suggest that melatonin (MT) could enhance crop tolerance to Cr pollution. This study aimed to investigate the effects of foliar spraying MT on alleviating Cr toxicity and accumulation in wheat irrigated with K2Cr2O7 solution at concentrations of 5, 10, and 20 mg/kg Cr in the soil. Our results showed that Cr-contaminated water irrigation significantly reduced dry weight, grain numbers, grain weight, yield, harvest index, net photosynthetic rate (Pn), maximum and actual photochemical efficiency of photosystem II (Fv/Fm and ΦPSII), chlorophyll contents, and the a/b ratio. It also increased PSII photodamage and oxidative stress in wheat leaves, resulting in high Cr accumulation in roots, leaves, and grains. Foliar spraying of MT alleviated Cr toxicity by improving Pn, Fv/Fm, and ΦPSII, enhancing chlorophyll content, promoting dry matter accumulation and yield, and reducing oxidative stress and Cr translocation. Furthermore, MT application enhanced transcriptional regulation, alleviated oxidative stress by boosting antioxidant enzyme activities, and restricted Cr translocation from roots to leaves and grains by increasing the accumulation of secondary metabolites, such as lignin and metallothionein. These findings suggest that MT application could serve as a viable strategy for reducing Cr contamination in cereals and supporting phytoremediation efforts.http://www.sciencedirect.com/science/article/pii/S0147651324015616Antioxidant enzymesGene expressionHeavy metalLigninMetallothioneinTriticum aestivum |
| spellingShingle | Chuanjiao Sun Libing Xu Qiang Gao Shuzhen Sun Xiaoxue Liu Zigang Zhang Zhongwei Tian Tingbo Dai Jianyun Sun Foliar spraying melatonin reduces the threat of chromium-contaminated water to wheat production by improving photosynthesis, limiting Cr translocation and reducing oxidative stress Ecotoxicology and Environmental Safety Antioxidant enzymes Gene expression Heavy metal Lignin Metallothionein Triticum aestivum |
| title | Foliar spraying melatonin reduces the threat of chromium-contaminated water to wheat production by improving photosynthesis, limiting Cr translocation and reducing oxidative stress |
| title_full | Foliar spraying melatonin reduces the threat of chromium-contaminated water to wheat production by improving photosynthesis, limiting Cr translocation and reducing oxidative stress |
| title_fullStr | Foliar spraying melatonin reduces the threat of chromium-contaminated water to wheat production by improving photosynthesis, limiting Cr translocation and reducing oxidative stress |
| title_full_unstemmed | Foliar spraying melatonin reduces the threat of chromium-contaminated water to wheat production by improving photosynthesis, limiting Cr translocation and reducing oxidative stress |
| title_short | Foliar spraying melatonin reduces the threat of chromium-contaminated water to wheat production by improving photosynthesis, limiting Cr translocation and reducing oxidative stress |
| title_sort | foliar spraying melatonin reduces the threat of chromium contaminated water to wheat production by improving photosynthesis limiting cr translocation and reducing oxidative stress |
| topic | Antioxidant enzymes Gene expression Heavy metal Lignin Metallothionein Triticum aestivum |
| url | http://www.sciencedirect.com/science/article/pii/S0147651324015616 |
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