Using Exogenous Melatonin, Glutathione, Proline, and Glycine Betaine Treatments to Combat Abiotic Stresses in Crops
Abstract
:1. Introduction
2. Melatonin
2.1. Structure and Function of Melatonin
2.2. Melatonin Effect against Drought Stress
2.3. Melatonin Effect against Salinity Stress
2.4. Melatonin Effect against Heat Stress
2.5. Melatonin Effect against Cold Stress
2.6. Melatonin Effect against Heavy Metal Stress
3. Glutathione
3.1. Structure and Function of Glutathione
3.2. Glutathione Effect against Drought Stress
3.3. Glutathione Effect against Salinity Stress
3.4. Glutathione Effect against Heat Stress
3.5. Glutathione Effect against Cold Stress
3.6. Glutathione Effect against Heavy Metal Stress
4. Proline
4.1. Structure and Function of Proline
4.2. Proline Effect against Drought Stress
4.3. Proline Effect against Salinity Stress
4.4. Proline Effect against Heat Stress
4.5. Proline Effect against Cold Stress
4.6. Proline Effect against Heavy Metal Stress
5. Glycine Betaine
5.1. Structure and Function of Glycine Betaine
5.2. Glycine Betaine Effect against Drought Stress
5.3. Glycine Betaine Effect against Salinity Stress
5.4. Glycine Betaine Effect against Heat Stress
5.5. Glycine Betaine Effect against Cold Stress
5.6. Glycine Betaine Effect against Heavy Metal Stress
Author Contributions
Funding
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Drought Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Melatonin Dose | Treatment Method | Response to Treatment | Reference(s) |
Arabidopsis thaliana | Arabidopsis | 50 µM | Supplemented with nutrient solution | Upregulated stress-responsive genes and soluble sugars | [14] |
Oryza sativa | Rice | 100 µM | Pretreatment in distilled water for growing | Improved plant growth, osmoprotectants, stress-responsive genes, and ROS scavenging; reduced electrolyte leakage | [15] |
Zea mays | Maize | 1 mM | Supplemented with irrigation | Upregulated photoprotection (photosystem II efficiency) | [16] |
Zea mays | Maize | 100 µM | Foliar application | Increased stomatal conductance, photosynthesis, transpiration rates, cell turgor, and water holding capacity; increased enzymatic and non-enzymatic antioxidants, regulated osmotic potential, and ROS scavenging | [17] |
Triticum aestivum | Wheat | 500 µM | Soil application | Regulated photosynthesis, cell turgor; increased water holding capacity and ROS scavenging; reduced membrane damage | [18] |
Triticum aestivum | Wheat | 10 and 100 µM (dependent on variety) | Seed treatment | Increased germination percentage, radicle and plumule length, and lysine (germination-related amino acid) | [19] |
Fagopyrum tataricum | Tartary Buckwheat | 100 µM | Foliar application | Increased osmoprotectants, water status, secondary metabolites, antioxidant enzymes, photosynthetic rate, and ROS scavenging | [20] |
Hordeum vulgare | Barley | 1 mM | Foliar or soil application | Increased endogenous melatonin, antioxidants, ABA, water status, rate of photosynthesis, and photosystem II efficiency | [21] |
Glycine max | Soybean | 50 µM | Seed coating | Increased seedling biomass and seedling growth; reduced electrolyte leakage | [22] |
Glycine max | Soybean | 100 µM | Foliar and root application | Increased plant growth, flowering, seed yield, gaseous exchange, photosystem II efficiency and antioxidant enzymes | [23] |
Minhot esculenta | Cassava | 100 µM | Soil application | Increased peroxidase activity and ROS scavenging | [24] |
Gossypium hirsutum | Cotton | 100 µM | Seed pre-soaking | Increased number and opening of stomata, antioxidant enzyme activities, osmoprotection, and ROS scavenging | [25] |
Medicago sativa | Alfalfa | 10 µM | Soil application | Increased chlorophyll content, stomatal conductance, and osmoprotection; upregulated nitro-oxidative homeostasis; reduced cellular redox disruption; scavenged ROS | [26] |
Malus domestica | Apple | 100 µM | Soil application | Increased water holding capacity, rate of photosynthesis, stomatal opening regulation, and antioxidants; decreased electrolyte leakage, ROS, oxidative damage, and leaf senescence | [27] |
Vitis vinifer | Grape | 100 µM | Root pretreatment supplemented with irrigation | Increased photoprotection, leaf thickness, stomata size, and enzymatic and non-enzymatic antioxidants; reduced oxidative damage | [4] |
Actinidia chinensis | Kiwifruit | 100 µM | Supplemented with irrigation | Increased osmoprotectants, protein biosynthesis and photosynthesis; reduced cell membrane damage | [12] |
Carya cathayensis | Chinese hickory | 100 µM | Foliar application pretreatment | Increased photosynthesis, antioxidants, and osmoprotectants; scavenged ROS | [13] |
Solanum lycopersicum | Tomato | 0.1 mM | Supplemented with irrigation | Increased photosynthesis, photosystem II efficiency, and antioxidants; reduced toxic substances | [28] |
Solanum lycopersicum | Tomato | 200 µM | Foliar application | Increased chlorophyll and antioxidant enzymes | [29] |
Capsicum annuum | Pepper | 50 µM | Seed pretreatment | Increased water holding capacity, endogenous melatonin, carotenoids, and chlorophyll | [30] |
Citrullus lanatus | Watermelon | 150 µM | Root pretreatment | Increased wax accumulation; reduced abscisic acid | [19] |
Cucumis sativus | Cucumber | 100 µM | Seed priming and nutrient solution | Increased seed germination, root growth, chlorophyll, photosynthesis, antioxidant enzymes, and ROS scavenging | [4] |
Cucumis sativus | Cucumber | 10 µM | Foliar application | Scavenged ROS; improved drought tolerance | [31] |
Brassica napus | Rapeseed | 500 µM | Seed priming | Increased chlorophyll, stomatal regulation, cell wall expansion, antioxidant enzymes, and osmoprotectants; reduced oxidative injury | [32] |
Dendranthema morifolium | Jinyu Chuju | 100 µM | Foliar application | Increased photosynthesis, chlorophyll, and osmoprotectants; reduced cell membrane damage and relative conductivity | [33] |
Dracocephalum moldavica | Moldavian balm (Dragon head) | 100 µM | Foliar application | Increased plant growth and flowering, antioxidant activity, chlorophyll, water holding capacity, and ROS scavenging | [34] |
Agrostis stolonifera | Creeping bentgrass | 20 µM | Foliar application | Increased photosynthetic content, water holding capacity, and photosystem II efficiency; reduced leaf senescence; scavenged ROS | [35] |
Festuca arundinacea | Tall fescue | 20 µM | Irrigation pretreatment | Increased antioxidant enzyme activity, chlorophyll, and plant growth; scavenged ROS | [36] |
Cynodon dactylon | Bermuda grass | 20 and 100 µM | Irrigation pretreatment | Increased plant growth, chlorophyll, antioxidant activity, stress-responsive genes, and hormonal regulation; scavenged ROS | [14] |
Trigonella foenum-graecum | Fenugreek | 100 and 300 µM | Foliar application pretreatment | Increased endogenous melatonin and secondary metabolites, chlorophyll, and antioxidant enzymes; scavenged ROS | [37] |
Coffea arabica | Coffee | 300 µM | Soil application | Increased photoprotection, gaseous exchange, carboxylation activity, chlorophyll, and antioxidant enzyme activities | [38] |
Camellia sinensis | Tea | 100 µM | Foliar application pretreatment | Increased photosynthesis, antioxidant enzymes, and GSH and AsA contents; scavenged ROS | [39] |
Nicotiana benthamiana | Tobacco | 10 µM | Foliar application | Improved drought tolerance; scavenged ROS; reduced oxidative damage | [31] |
Salinity Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Melatonin Dose | Treatment Method | Response to Treatment | Reference(s) |
Momordica charantia | Bitter melon | 150 µM | Seed priming | Increased relative water content, antioxidant enzyme activities, and gene expression levels; decreased hydrogen peroxide and malondialdehyde levels | [42] |
Zea mays | Maize | 0.4, 0.8, and 1.6 mM | Pretreatment of seeds | Improved shoot and root lengths, germination energy, fresh and dry weights of seedling, K+ content, antioxidant enzyme activities, and relative water content. | [43] |
Gossypium hirsutum | Cotton | 25 µM | Seed priming | Enhanced ability to scavenge ROS and improved photosynthetic efficiency | [44] |
Triticum aestivum | Wheat | 70 µM | Seed priming | Enhanced photosynthetic pigments; indole-3-acetic acid content and growth parameters | [45] |
Ocimum basilicum | Basil | 10 µM | Seed priming | Increased contents of flavonoid and phenolic acid | [46] |
Vicia faba | Faba bean | 100 and 500 mM | Seed priming | Improved novel protein expressions | [47] |
Cucumis sativum | Cucumber | 1 µM | Seed priming | Enhanced seed germination | [43] |
Arabidopsis thaliana | Arabidopsis | 10 µM | Foliar application | Induced antioxidant defense system; scavenged ROS; upregulated abscisic acid-responsive genes | [48] |
Brassica napus | Rapeseed | 1 µM | Foliar application | Reduced lipid peroxidation and hydrogen peroxide content; maintained redox and ion homeostasis | [49] |
Brassica juncea | Mustard greens | 1 µM | Foliar application | Increased leaf length and width, plant height, and stem diameter; improved gaseous exchange, relative water content; increased salicylic acid and reduced abscisic acid | [50] |
Cucumis melo | Melon | 0, 10, and 50 µM | Seed pretreatment | Increased seed germination | [51] |
Oryza sativa | Rice | 0, 10, and 20 µM | Root irrigation | Upregulated antioxidants and leaf senescence; inhibited cell death and chlorophyll degradation | [52] |
Glycine max | Soybean | 0–100 µM | Foliar application | Increased photosynthesis, cell division, carbohydrates, fatty acids, and ascorbate contents; reduced inhibitory effect on gene expressions | [22] |
Malus hupehensis | Pingyitiancha | 0.1 µM | Seed pretreatment | Increased photosynthesis and ion homeostasis; reduced oxidative damage | [53] |
Solanum lycopersicum | Tomato | 100 µM | Root irrigation | Increased protein and membrane protection, antioxidant activities, and photosynthesis | [54] |
Citrullus lanatus | Watermelon | 50–150 µM | Seed pretreatment | Increased antioxidant enzymes, photosynthesis, and photosystem II efficiency; reduced stomatal closure and oxidative damage | [55] |
Heat Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Melatonin Dose | Treatment Method | Response to Treatment | Reference(s) |
Triticum aestivum | Wheat | 20 µM | Soil application | Increased rate of photosynthesis; reduced oxidative damage | [56] |
Lolium perenne | Perennial Ryegrass | 100 µM | Foliar application | Regulated cytokinin biosynthesis genes; downregulated abscisic acid biosynthesis genes; enhanced endogenous melatonin level | [57] |
Solanum lycopersicum | Tomato | 100 µM | Seed pretreatment | Enhanced phenolic acid level; regulated transcript abundances; increased endogenous melatonin levels; reduced oxidative stress | [58] |
Arabidopsis thaliana | Arabidopsis | 20 µM | Foliar application | Upregulated heat shock factors | [59] |
Zea mays | Maize | 100 µM | Soil application | Increased photosynthesis; reduced oxidative damage | [17] |
Cold Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Melatonin Dose | Treatment Method | Response to Treatment | Reference(s) |
Triticum aestivum | Wheat | 100 µM | Spray | Improved antioxidant enzyme activities; reduced oxidative stress | [61] |
Citrullus lanatus | Watermelon | 150 µM | Soil treatment | Increased accumulation of hydrogen peroxide; increased tolerance | [62] |
Solanum lycopersicum | Tomato | 100 µM | Seedling spray | Improved photosynthesis; reduced oxidative damage | [63] |
Cynodon dactylon | Bermuda grass | 100 µM | Foliar application | Increased arabinose, mannose, and propanoic acid levels | [64] |
Hordeum vulgare | Barley | 1 mM | Soil irrigation | Improved water status, antioxidant system, and abscisic acid level | [21] |
Camellia sinensis | Tea plant | 100 µM | Spray | Improved production of antioxidant enzymes; reduced oxidative stress | [65] |
Oryza sativa | Rice | N/A | Spray | Increased antioxidant enzyme activities; reduced oxidative stress | [55] |
Cucumis sativus | Cucumber | 100 µM | Foliar spray | Improved antioxidant enzyme productions and activities; reduced oxidative stress | [66] |
Heavy Metal Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Melatonin Dose | Treatment Method | Response to Treatment | Reference(s) |
Triticum aestivum | Wheat | 50 µM | Soil treatment | Increased antioxidant enzymes against cadmium metal stress | [68] |
Medicago sativa | Alfalfa | 50 µM | Foliar application | Increased ABC transporters; decreased cadmium accumulation | [69] |
Solanum lycopersicum | Tomato | 100 µM | Seed priming | Increased antioxidants and plant growth; reduced electrolyte leakage and photoinhibition under cadmium metal stress | [21] |
Nicotiana benthamiana | Tobacco | 15 µM | Foliar application | Increased cell growth and viability; decreased DNA damage against lead heavy metal | [53] |
Cyphomandra betacea | Tree tomato | 50 µM | Soil treatment | Increased antioxidants and plant biomass under cadmium stress | [70] |
Glycine max | Soybean | 100 mM | Seed priming | Increased photosynthesis and antioxidant enzymes under aluminum stress | [53] |
Brassica oleracea | Red cabbage | 10 µM | Foliar application | Increased germination and fresh weight against copper metal stress | [53] |
Citrullus lanatus | Watermelon | 50 mg/L | Seed priming | Increased plant growth, photosynthesis, chlorophyll, antioxidant enzymes, and scavenging of ROS against vanadium metal stress | [71] |
Zea mays | Maize | 500 µM | Soil treatment | Induced additional proteins related to stress reduction during germination | [72] |
Cucumis sativus | Cucumber | 100 and 150 µM | Soil irrigation | Reduced stress-promoted expression of genes e.g., CsHA2 under cadmium metal stress | [43] |
Amaranthus viridis | Amaranthus | 400 µM | Foliar application | Decreased accumulation of metals (e.g., lead) in roots | [73] |
Drought Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glutathione Dose | Treatment Method | Response to Treatment | Reference(s) |
Cicer arietinum | Chickpea | 0.75 mM | Seed soaking | Increased growth parameters, chlorophyll, photosynthesis, endogenous proline, and antioxidant enzyme activities | [74] |
Oryza sativa | Rice | 0.2 mM | Spraying | Increased root and shoot lengths, dry and fresh weights, chlorophyll pigment, relative water content, and antioxidant enzyme activities | [5] |
Brassica napus | Rapeseed | N/A | Foliar application | Scavenged ROS; reduced oxidative damage | [75] |
Triticum aestivum | Wheat | N/A | Sprayed | Improved tolerance compared with non-treated cultivar | [76] |
Vigna radiata | Mung bean | N/A | Exogenous application | Lessened drought-induced oxidative damage through the enhancement of the capacity of the antioxidant system and glyoxalase activity | [77] |
Arabidopsis thaliana | Arabidopsis | N/A | Spraying | Increased abscisic acid level and tolerance against drought stress; improved plant health under stressful conditions | [78] |
Salinity Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glutathione Dose | Treatment Method | Response to Treatment | Reference(s) |
Capsicum frutescence | Pepper | 0.4 and 0.8 mM | Foliar spray | Increased water use efficiency, growth, fresh and dry weights of roots and shoots, yield, osmoprotectants, and antioxidants | [79] |
Cucumis sativus | Cucumber | 0.5 mM | Seed soaking | Increased growth, fresh and dry weights, relative water content, photosynthetic activity, and stomatal conductance | [80] |
Vicia faba | Faba bean | 0.5 mM | Foliar spray | Increased growth, fresh and dry weights, relative water content, photosynthetic activity, stomatal conductance, and antioxidant enzyme activities | [81] |
Triticum aestivum | Wheat | 1 mM | Foliar spray | Increased plant growth, membrane stability, and accumulation of osmoprotectants | [59] |
Glycine max | Soybean | 1 mM | Foliar spray | Increased growth, photosynthesis, membrane stability, soluble sugars, and antioxidant enzyme activities | [5] |
Phaseolus vulgaris | Common bean | 0.75 mM | Foliar spray | Increased plant length, number and surface area of leaves, fresh and dry weights of plant, relative water content, photosynthesis, and soluble sugars | [5] |
Arabidopsis thaliana | Arabidopsis | N/A | Foliar application | Increased abscisic acid and tolerance against drought stress; improved plant health under stressful conditions | [78] |
Solanum lycopersicum | Tomato | N/A | Exogenous application | Improved tolerance against salinity and oxidative stresses; decreased lipid peroxidation | [82] |
Oryza sativa | Rice | N/A | sprayed | Improved activities of antioxidant enzymes; decreased ROS accumulation and ROS-induced DNA damage | [83] |
Heat Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glutathione Dose | Treatment Method | Response to Treatment | Reference(s) |
Triticum aestivum | Wheat | N/A | External application | Increased antioxidant enzyme activities and resistance to heat stress | [85,87] |
Vigna radiata | Mung bean | N/A | Seed pretreatment | Increased antioxidant enzyme activities; enhanced stress resistance; decreased ROS level | [77] |
Cucumis sativus | Cucumber | N/A | External application | Enhanced heat resistance, plant growth, chlorophyll content, and photosynthetic rate | [84] |
Brassica campestris | Mustard | N/A | External application | Maintained relative water content; increased ROS scavenging and antioxidants | [86] |
Cold Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glutathione Dose | Treatment Method | Response to Treatment | Reference(s) |
Oryza sativa | Rice | 0.5 Mm | Spraying | Increased lengths of root and shoot, fresh and dry weights, and endogenous glutathione level | [88] |
Capsicum annum | Pepper | 0.5 Mm | Spraying | Increased lengths of root and shoot, fresh and dry weights, and endogenous glutathione level | [60] |
Cucumis sativus | Cucumber | N/A | Foliar application | Decreased electrolyte leakage and lipid peroxidation | [89] |
Jatropha curcas | Purging nut | N/A | External application | Enhanced resistance and antioxidant enzyme activities | [90] |
Heavy Metal Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glutathione Dose | Treatment Method | Response to Treatment | Reference(s) |
Triticum aestivum | Wheat | 20 µM | Foliar spray | Increased photosynthetic pigments and endogenous glutathione level against cadmium metal | [62] |
Solanum melongena | Brinjal(Aubergine) | 1 mM | Seed pretreatment | Mitigated adverse effects of stress and protein damage against arsenate metal stress | [91] |
Zea mays | Maize | 30 µM | Foliar application | Increased secondary metabolites and flavonoids; alleviated oxidative damage under cadmium metal stress | [92] |
Lolium multiflorum | Italian ryegrass | 200 µM | External application | Increased stress tolerance and biomass of roots and shoots against lead stress | [93] |
Hordeum vulgare | Barley | N/A | External application | Improved antioxidant defense system and photosynthesis; decreased ROS accumulation against cadmium metal stress | [94,98] |
Solanum lycopersicum | Tomato | N/A | External application | Synchronized transcript levels of several stress-responsive transcription factors; improved nitric oxide contents against cadmium metal stress | [95] |
Oryza sativa | Rice | N/A | External application | Elevated endogenous glutathione level, mineral elements and pigment contents; upregulated phytochelatins; synchronized antioxidant enzyme activities under cadmium metal stress | [96,99] |
Brassica campestris | Mustard | N/A | Exogenous application | Reduced cadmium levels in roots and leaves and the accumulation of ROS; protected against stress | [97] |
Drought Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Proline Dose | Treatment Method | Response to Treatment | Reference(s) |
Zea mays | Maize | 1 mM | Seed priming | Increased photosynthetic and transpiration rates and stomatal conductance | [6] |
Zea mays | Maize | N/A | Foliar application | Promoted uptake and accumulation of nitrogen, phosphorus, and potassium, as well as tolerance against drought stress | [6] |
Triticum aestivum | Wheat | 150 ppm | Foliar application | Reduced malondialdehyde level and lipid peroxidation | [101] |
Chenopodium quinoa | Quinoa | N/A | Foliar application | Improved photosynthetic pigments, phenols, free amino acids, plant height, and dry and fresh weights of roots and shoots | [102] |
Arabidopsis thaliana | Arabidopsis | N/A | Spraying | Scavenged ROS; protected the integrity of plasma lemma | [100] |
Pisum sativum | Pea | 4 mM | Foliar spray | Increased yield, the non-enzymatic antioxidant defense system, and soluble protein concentration | [103] |
Salinity Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Proline Dose | Treatment Method | Response to Treatment | Reference(s) |
Cucumis melo | Muskmelon | 10 mM | Foliar spray | Increased growth, chlorophyll and proline contents, and relative water content | [104] |
Cucumis sativus | Cucumber | 10 mM | Nutrient solution | Increased growth, proline content, and antioxidant enzyme activities | [105] |
Glycine max | Soybean | 25 mM | External application | Increased growth, proline content, antioxidant enzyme activities, and nitrogen fixation | [106] |
Helianthus annus | Sunflower | 30 and 60 mM | Foliar spray | Increased growth, proline and amino acids contents, and antioxidant enzyme activities | [107] |
Zea mays | Maize | 30 mM | Foliar spray | Increased growth and proline content | [108] |
Triticum durum | Durum wheat | 12 mM | Seed pretreatment | Increased growth, photosynthetic activity, proline content, and antioxidant enzyme activities | [109] |
Sorghum bicolor | Great millet | 30 mM | Foliar spray | Increased growth, relative water content, gaseous exchange, and amino acids and proline contents | [110] |
Oryza sativa | Rice | 1, 5, and 10 mM | Seed pretreatment | Increased growth, seed germination, and chlorophyll and proline content | [111] |
Brassica juncea | Mustard greens | 20 mM | Foliar application | Improved yield and stress tolerance | [112] |
Capsicum annum | Red pepper | 0.8 mM | Foliar application | Improved antioxidant enzyme activities, photosynthetic and transpiration rates, plant dry and fresh weights, and root and shoot lengths | [113] |
Daucus carota | Wild carrot | N/A | Foliar application | Improved antioxidant enzyme activities, and potassium and calcium contents in roots and shoots | [114] |
Phaseolus vulgaris | Bean | N/A | Foliar application | Improved antioxidant enzyme activities and endogenous proline level | [115] |
Raphanus sativus | Radish | N/A | Foliar application | Improved transpiration rate, stomatal conductance, pigment contents, and levels of proteins and some nutrients | [116] |
Vicia faba | Faba bean | N/A | Foliar application | Improved levels of photosynthetic pigments, soluble carbohydrates, endogenous proline, and free amino acids | [6] |
Lactuca sativa | Lettuce | 5 µM | Foliar application | Improved plant growth, photosynthetic rate, chlorophyll content and yield | [117] |
Heat Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Proline Dose | Treatment Method | Response to Treatment | Reference(s) |
Abelmoschus esculentus | Okra | N/A | Foliar application | Improved shoot length, number of leaves per plant, and free amino acids content | [118] |
Lactuca sativa | Lettuce | 5µM | Foliar application | Improved plant growth, photosynthetic rate, chlorophyll content and yield | [117] |
Vigna radiata | Mung bean | N/A | Foliar application | Improved carbon dioxide (CO2) assimilation capacity and heat tolerance | [119] |
Cold Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Proline Dose | Treatment Method | Response to Treatment | Reference(s) |
Citrus reticulata | Mandarin orange | N/A | Foliar application | Increased contents of phenolic acids, flavonoids and endogenous proline; increased antioxidant enzyme activities | [120] |
Citrus sinensis | Sweet orange | N/A | Foliar application | Increased contents of phenolic acids, flavonoids, and endogenous proline; increased antioxidant enzyme activity | [120] |
Citrus paradisi | Grapefruit | N/A | Foliar application | Increased contents of phenolic acids, flavonoids and endogenous proline; increased antioxidant enzyme activity | [120] |
Capsicum annum | Red pepper | 24 mM | Foliar application | Increased endogenous proline level and antioxidant enzyme activities | [6] |
Heavy Metal Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Proline Dose | Treatment Method | Response to Treatment | Reference(s) |
Cicer arietinum | Chickpea | N/A | Foliar application | Improved nitrogen fixation, nitrogen content in leaves, and antioxidant enzyme activities against cadmium stress | [121] |
Olea europaea | Olive | 20 mM | Irrigation | Enhanced proline and oil contents, antioxidant enzyme activities; reduced hydrogen peroxide against cadmium stress | [122] |
Phaseolus vulgaris | Bean | N/A | Culture medium | Improved relative water content, chlorophyll and endogenous proline contents, and antioxidant enzyme activities under selenium heavy metal stress | [6,123] |
Pisum sativum | Pea | N/A | Foliar application | Enhanced growth, photosynthetic activity, relative water content and organic osmolyte contents | [6] |
Poncirus trifoliata | Trifoliate orange | N/A | Nutrient solution | Enhanced protein and cellulose contents against aluminum stress | [124] |
Solanum melongena | Aubergine | N/A | Seedling treatment | Increased endogenous proline level and antioxidant enzyme activities under arsenate stress | [6,125] |
Triticum aestivum | Wheat | 80 mM | Foliar spray | Reduced ROS; increased plant height, weight, and photosynthetic capacity | [103] |
Zea mays | Maize | N/A | Exogenous application | Improved defensive mechanism and sugar biosynthesis against cadmium stress | [126] |
Drought Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glycine Betaine Dose | Treatment Method | Response to Treatment | Reference(s) |
Triticum aestivum | Wheat | N/A | Exogenous application | Improved stress tolerance index; enhanced osmolyte and relative water contents | [129] |
Triticum aestivum | Wheat | N/A | Exogenous application | Increased spike length, number of spikelets per spike, number of grains, yield, and leaf turgor potential | [130] |
Zea mays | Maize | 100 mM | Foliar application | Enhanced growth, yield, and antioxidant enzyme activities | [131] |
Solanum lycopersicum | Tomato | N/A | Exogenous application | Improved yield | [132] |
Pisum sativum | Pea | N/A | Exogenous application | Enhanced growth, number of pods and leaves per plant; increased level of soluble sugars and soluble protein in leaves; increased antioxidant enzyme activities | [133] |
Nicotiana tabacum | Tobacco | 80 mM | Foliar application | Improved plant growth, osmotic adjustment, photosynthesis, and antioxidant enzyme activities | [128] |
Glycine max | Soybean | 3 kg/ha | Exogenous application | Increased seed number | [134] |
Salinity Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glycine Betaine Dose | Treatment Method | Response to Treatment | Reference(s) |
Vigna unguiculata | Cowpeas | 5–10 mM | Foliar application | Increased soluble sugar contents and antioxidant enzymes | [135] |
Phaseolus vulgaris | Common bean | N/A | Exogenous application | Increased plant fresh weight, leaf area ratio, relative water content, and soluble sugar and free amino acid contents | [136] |
Oryza sativa | Rice | N/A | Foliar application | Increased plant height, fresh and dry weights, and chlorophyll content; reduced malondialdehyde content | [128] |
Solanum lycopersicum | Tomato | N/A | Exogenous application | Increased photosynthesis and stomatal conductance; decreased photorespiration | [128] |
Glycine max | Soybean | N/A | Exogenous application | Reduced ROS and lipid peroxidation; increased antioxidant enzyme activities | [137] |
Lolium perenne | Perennial ryegrass | 0, 20, 50 mM | Exogenous application | Increased fresh weight and relative water content; reduced electrolyte leakage and malondialdehyde content | [138] |
Triticum aestivum | Wheat | N/A | Exogenous application | Increased rate of photosynthesis | [139] |
Heat Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glycine Betaine Dose | Treatment Method | Response to Treatment | Reference(s) |
Solanum lycopersicum | Tomato | N/A | External application | Increased fruit yield and rate of photosynthesis | [128] |
Solanum lycopersicum | Tomato | 1, 5 mM | External application | Improved seed germination, expression of heat shock genes, and accumulation of heat shock proteins | [140] |
Hordeum vulgare | Barley | N/A | External application | Increased tolerance of photosystem Ⅱ; protective effect on oxygen-evolving complex | [141] |
Hordeum vulgare | Barley | 10 mM | External application | protective effect on oxygen-evolving complex; greater photosystem Ⅱ stability | [141] |
Hordeum vulgare | Barley | 10, 20, 30, 40 and 50 mM | External application | Improved growth, photosynthesis, and water relations; decreased ion leakage | [142] |
Triticum aestivum | Wheat | 100 mM | External application | Maintained higher chlorophyll content, photosystem Ⅱ photochemical activity, net photosynthetic rate, and accumulation of endogenous glycine betaine | [85] |
Triticum aestivum | Wheat | 50 and 100 mM | External application | Improved yield and relative membrane permeability | [7] |
Saccharum officinarum | Sugarcane | 20 mM | External application | Improved bud sprouting, soluble sugar accumulation, and endogenous level of osmolytes; decreased hydrogen peroxide | [143] |
Tagetes erecta | Marigold | 0.5 and 1 mM | External application | Improved gaseous exchange; reduced ROS accumulation | [144] |
Cold Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glycine Betaine Dose | Treatment Method | Response to Treatment | Reference(s) |
Zea mays | Maize | 100 mM | Foliar application | Prevented chlorosis; reduced lipid peroxidation of membrane | [145] |
Triticum aestivum | Wheat | 100 mM | Foliar spray | Increased osmolality and photosynthesis | [146] |
Prunus persica | Peach | 10 mM | External application | Lowered malondialdehyde content; increased endogenous glycine betaine level | [147] |
Medicago sativa | Alfalfa | 0.2 M | Seedling sprayed | Decreased ion leakage from shoot tissues | [148] |
Solanum lycopersicum | Tomato | 0.1 mM | Foliar spray | Increased catalase activity; reduced hydrogen peroxide | [149] |
Hordeum vulgare | Barley | N/A | External application | Increased osmolality and endogenous level of glycine betaine | [146] |
Heavy Metal Stress | |||||
---|---|---|---|---|---|
Crop | Common Name | Glycine Betaine Dose | Treatment Method | Response to Treatment | Reference(s) |
Triticum aestivum | Wheat | 0–100 mM | Spraying on leaves | Improved growth, chlorophyll contents, and biomass and protein contents against chromium stress | [150] |
Gossypium hirsutum | Cotton | 1 mM | Exogenous application | Improved plant growth, antioxidant enzyme activities and photosynthetic rate and gaseous exchange; alleviated cadmium stress | [151] |
Gossypium hirsutum | Cotton | N/A | Foliar application | Improved plant growth and gas attributes; alleviated lead stress | [152] |
Vigna radiata | Mung bean | 0, 50, 100 mM | Foliar application | Improved plant growth; alleviated chromium stress | [153] |
Amaranthus tricolor | Amaranth | N/A | Exogenous application | Improved photosynthesis and chlorophyll content of leaves; alleviated cadmium stress | [154] |
Lolium perenne | Perennial ryegrass | N/A | Exogenous application | Improved membrane stability; reduced lipid peroxidation; alleviated cadmium stress | [155] |
Nicotiana tabacum | Tobacco | N/A | Exogenous application | Reduced stomatal closure, accumulation of malondialdehyde, and leaf damage; alleviated cadmium stress | [8] |
Cucumis sativus | Cucumber | N/A | Foliar application | Significant protective effect on chlorophyll content; alleviated aluminum stress | [156] |
Sorghum bicolor | Millet | 50–100 mM | Exogenous application | Improved quality and yield; alleviated chromium stress | [157] |
Oryza sativa | Asian rice | N/A | Exogenous application | Increased GST and GRX gene expressions; alleviated arsenic stress | [158] |
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Khalid, M.; Rehman, H.M.; Ahmed, N.; Nawaz, S.; Saleem, F.; Ahmad, S.; Uzair, M.; Rana, I.A.; Atif, R.M.; Zaman, Q.U.; et al. Using Exogenous Melatonin, Glutathione, Proline, and Glycine Betaine Treatments to Combat Abiotic Stresses in Crops. Int. J. Mol. Sci. 2022, 23, 12913. https://doi.org/10.3390/ijms232112913
Khalid M, Rehman HM, Ahmed N, Nawaz S, Saleem F, Ahmad S, Uzair M, Rana IA, Atif RM, Zaman QU, et al. Using Exogenous Melatonin, Glutathione, Proline, and Glycine Betaine Treatments to Combat Abiotic Stresses in Crops. International Journal of Molecular Sciences. 2022; 23(21):12913. https://doi.org/10.3390/ijms232112913
Chicago/Turabian StyleKhalid, Memoona, Hafiz Mamoon Rehman, Nisar Ahmed, Sehar Nawaz, Fozia Saleem, Shakeel Ahmad, Muhammad Uzair, Iqrar Ahmad Rana, Rana Muhammad Atif, Qamar U. Zaman, and et al. 2022. "Using Exogenous Melatonin, Glutathione, Proline, and Glycine Betaine Treatments to Combat Abiotic Stresses in Crops" International Journal of Molecular Sciences 23, no. 21: 12913. https://doi.org/10.3390/ijms232112913