Oxidation resistance of exogenous melatonin on leaves of kiwifruit seedlings under copper stress

Zhao, Xinjin; Xia, Hui; Xie, Yue; Li, Mingzhang; Wang, Yongzhi; Liang, Dong

doi:10.2991/iccte-17.2017.37

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…Melatonin induces the expression of specific genes and increases the content of GSH and PCs to sequester excess Cu 2+ , which is transported and stored in the apoplast [ 123 ]. Zhao et al [ 124 ] found that exogenous melatonin effectively increased the content of Pro and antioxidants in the leaves of kiwifruit ( Actinidia deliciosa ) seedlings under Cu stress, enhanced the osmotic regulation and antioxidant capacity of cells, and alleviated Cu toxicity.…”

Section: Mechanisms Of Copper Detoxification and Tolerance In Plantsmentioning

confidence: 99%

Physiological and Molecular Mechanisms of Plant Responses to Copper Stress

Chen

Han

et al. 2022

IJMS

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Copper (Cu) is an essential micronutrient for humans, animals, and plants, and it participates in various morphological, physiological, and biochemical processes. Cu is a cofactor for a variety of enzymes, and it plays an important role in photosynthesis, respiration, the antioxidant system, and signal transduction. Many studies have demonstrated the adverse effects of excess Cu on crop germination, growth, photosynthesis, and antioxidant activity. This review summarizes the biological functions of Cu, the toxicity of excess Cu to plant growth and development, the roles of Cu transport proteins and chaperone proteins, and the transport process of Cu in plants, as well as the mechanisms of detoxification and tolerance of Cu in plants. Future research directions are proposed, which provide guidelines for related research.

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Section: Mechanisms Of Copper Detoxification and Tolerance In Plantsmentioning

confidence: 99%

Physiological and Molecular Mechanisms of Plant Responses to Copper Stress

Chen

Han

et al. 2022

IJMS

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show abstract

“…According to Oloumi et al (2024), melatonin improves the ability of basil seedlings to tolerate Cu stress by controlling mineral nutrition, growth, and antioxidant responses. Zhao et al (2017) found that applying melatonin from an external source significantly raised the levels of proline and antioxidants in the leaves of kiwifruit seedlings (Actinidia deliciosa), which, when exposed to Cu stress, improved the cells' ability to regulate osmotic balance and enhanced their ability to counteract the harmful effects of copper, thus reducing its toxicity.…”

Section: Introductionmentioning

confidence: 99%

Alleviation of Copper Stress in Tomato Plants using Proline and Melatonin in an Open Soilless System

Brengi

2024

Alexandria Science Exchange Journal

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This experiment was conducted to study the response of tomato plants (Solanum lycopersicum L. cv. 'Thuria') to different levels of copper and to reduce the harmful effects of high levels. The plants were grown during two summer seasons between March and July (2022) and repeated between March and July (2023) on a private soilless farm in New Noubaria City, Beheira Governorate. The plants were grown in sandy and peat moss as substrate, copper was added to the tomato plants through the nutrient solution. The Cu concentrations in the nutrient solutions were: control 48 ppb (the Cu concentration in the standard irrigation solution), 96 ppb, 144 ppb, and 192 ppb. On the other hand, protective treatments tested as foliar sprays are proline (Pro1) 40 mmol, proline (Pro2) 80 mmol, melatonin (MT1) 50 µmol, melatonin (MT2) 100 µmol, and the control distilled water. The results obtained from the two seasons indicated that increasing the Cu concentration led to a significant decrease in the fresh weight of roots and aerial parts, fresh and dry weight of the tomato plant, number of fruits per plant, average fruit weight, and plant productivity in both seasons. The highest mean values for the previous characteristics were achieved by applying Cu at 48 ppb (control treatment). However, the lowest mean values were obtained with the application of Cu at 192 ppb. Regarding the elemental content of tomato plants, the results showed that leaf nitrogen, phosphorus, and potassium contents decreased. In contrast, Cu contents in roots, stems, leaves, and fruits increased with increasing Cu concentrations in the nutrient solution. The chlorophyll content in leaves increased from 48 ppb to 96 ppb copper, decreasing sharply with increasing Cu concentration up to 192 ppb. Meanwhile, the protein and proline contents of the leaves decreased as the Cu concentration increased. The roots and leaf's contents of hydrogen peroxide, MDA, catalase enzyme activity, and superoxide dismutase increased with increasing Cu concentration. However, using proline (Pro1) 40 mmol, proline (Pro2) 80 mmol, melatonin (MT1) 50 μmol, and melatonin (MT2) 100 μmol, led to the plant's leaves having more nitrogen, phosphorus, potassium, and chlorophyll, which was reflected in improved plant growth characteristics compared with the control under different copper levels. It also improved the antioxidant content in the roots and leaves, which helped increase the number of fruits per plant, average fruit weight, and plant productivity. The outcome of this research suggested the possibility of using 100 μmol melatonin (MT2) and proline(Pro2) 80 mmol to reduce the harmful effects of excess copper in tomato plants.

show abstract

Oxidation resistance of exogenous melatonin on leaves of kiwifruit seedlings under copper stress

Cited by 2 publications

References 9 publications

Physiological and Molecular Mechanisms of Plant Responses to Copper Stress

Physiological and Molecular Mechanisms of Plant Responses to Copper Stress

Alleviation of Copper Stress in Tomato Plants using Proline and Melatonin in an Open Soilless System

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