Melatonin application confers enhanced salt tolerance by regulating Na+ and Cl− accumulation in rice

Li, Xiaojiang; Yu, Bingjun; Cui, Yiqing; Yin, Yifan

doi:10.1007/s10725-017-0310-3

Cited by 87 publications

(46 citation statements)

References 56 publications

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“…Enhanced Ca concentration in melatonin-treated seedlings suggests that melatonin might had achieved its protective effect on membranes by increasing the Ca concentration. These results are confirmed by earlier findings by Jiang et al (2016) who found the increase in K level of maize plant by melatonin treatment under drought stress and Li et al (2017) who show that melatonin treatment on rice plant increased K contents under salinity stress.…”

Section: Discussionsupporting

confidence: 91%

“…1) thus increased photosynthetic output so increased translocation from source to sink. Moreover, melatonin can mediate various biochemical and physiological processes in plants, i.e., growth regulation and ion homeostasis and increase vegetative growth in a number of plant species leading to increments in seed yield (Janas and Posmyk 2013;Sadak 2016b;El-Awadi et al 2017a;Li et al 2017, andÇolak 2018). The promotive effects of melatonin treatment on Moringa oleifera plants could be attributed to melatonin as a kind of endogenous plant growth regulator acting in trace amounts (Zhang et al 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, one of the main functions of melatonin, along with the activities of SOD and CAT may be to preserve intracellular H 2 O 2 concentrations at steady scale levels (Cui et al 2017). Li et al (2017) showed that melatonin, a potent long-distance signal, may be translocated from the treated leaves or roots of plant to distant untreated tissues via vascular bundles, leading to systemic induction of a different abiotic tolerance. Moreover, studies on how melatonin interacts with stress signaling mechanisms have identified a complex relationship with ROS.…”

Section: Discussionmentioning

confidence: 99%

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Role of melatonin in improving growth, yield quantity and quality of Moringa oleifera L. plant under drought stress

et al. 2020

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Background: Melatonin, an indoleamine compound, has the ability to regulate a lot of physiological and biochemical processes under different environmental stresses such as drought stress. Materials and methods: So, this investigation was done to study the physiological role of melatonin on Moringa oleifera plants grown in sandy soil at normal and drought stress. Results: Subjecting M. oleifera plant to drought stress caused significant decreases in growth, photosynthetic pigment, indole acetic acid (IAA), element contents, yield, and yield attributes, meanwhile increased lipid peroxidation is expressed as malondialdehyde (MDA) and various antioxidant enzymes as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POX). On the other hand, foliar treatment with different concentrations of melatonin significantly increased growth parameters, yield quantity, and quality of M. oleifera plant at normal and drought-stressed conditions via improving photosynthetic pigments (IAA), phenolic and element contents, and antioxidant enzyme systems, whereas declined malondialdhyde (MDA) contents as compared with their corresponding untreated controls (M0). Foliar treatment with 100 mM melatonin showed the greatest growth criteria and yield components of M. oleifera plants at either normal irrigation or under drought stress. This concentration also improved amino acid constituents of the yielded M. oleifera plants compared with other concentrations under normal and stress conditions. Conclusion: We can conclude that spraying M. oleifera with melatonin could alleviate the reduced effect of drought stress.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Role of melatonin in improving growth, yield quantity and quality of Moringa oleifera L. plant under drought stress

et al. 2020

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“…Under salt stress, exogenous melatonin treatment was found to signi cantly increase rice germination index (GI), germination potential (GP), vital index (VI), and root vigor, and reduce relative electrolytic leakage [39]. Similar results have been obtained in various plants, including in watermelon, tomato, and rapeseed seedlings under different stresses [34,35,28].…”

Section: Introductionsupporting

confidence: 63%

Melatonin Promotes Seed Germination Under Salt Stress by Regulating ABA and GA3 in Cotton (Gossypium Hirsutum L.)

Chen

Lü

Liu

et al. 2020

Preprint

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Background: Although previous studies have found that melatonin can promote seed germination, the phytohormone regulation mechanism by which exogenous melatonin mediates salt tolerance during cotton seed germination is still largely unknown. We investigated the effect of melatonin on the germination traits and physiological parameters of GXM9 cotton seeds (Gossypium hirsutum L.) under three salt stress treatments (CK, germination of seeds pretreated with water alone; S, germination of seeds pretreated in 150 mM NaCl under salt stress; SM, germination of seeds pretreated in 20 µM melatonin under 150 mM NaCl solution) in the laboratory.Results: We found that salt stress (150 mM) inhibited cotton seed germination and endogenous melatonin accumulation, and pretreatment with 20 µM exogenous melatonin enhanced the cotton germination rate and hypocotyl length as well as the content of endogenous melatonin during seed germination. This suggests that exogenous melatonin promotes seed germination from a morphological perspective. The contents of starch, α-amylase (EC3.3.1.1), β-galactosidase (EC3.2.1.23), abscisic acid (ABA), and gibberellin (GA) were determined simultaneously. The results showed that the α-amylase and β-galactosidase contents in the cotton seeds decreased by 56.97% and 20.18%, respectively, under salt stress compared with the control, while the starch content increased by 11.53% compared with the control at day 7. The ABA content increased by 25.18% and GA content decreased by 27.99% under salt stress compared with the control at 24 h. When exogenous melatonin was applied to the cotton seeds, the content of α-amylase and β-galactosidase increased by 121.77% and 32.76%, respectively, whereas the starch contents decreased by 13.55% compared with the S treatment at day 7. Similarly, the ABA content increased by 12.20% and the GA content increased by 4.77% at 24 h. To elucidate the molecular mechanism by which melatonin promotes seed germination under salt stress, the effects of ABA- and GA-related genes on plant hormone signal transduction were analyzed by quantitative real-time PCR and RNA sequencing. The results indicated that melatonin regulated the expression of ABA and GA genes in the plant signal transduction pathway, induced embryo root development and seed germination, and alleviated dormancy. We found that the expression of the ABA signaling gene GhABF2 was up-regulated and GhDPBF2 was down-regulated, and the expression of GA signaling genes (e.g., GhGID1C and GhGID1B) was up-regulated by melatonin.Conclusions: We discovered that melatonin enhances salt tolerance in cotton seeds by regulating ABA and GA and by mediating the expression of hormone-related genes in plant hormone signal transduction. This should help us to explore the regulatory mechanisms of cotton resistance and provide a foundation for the cultivation of new varieties.

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“…Moreover, one of the main functions of melatonin, along with the activities of SOD and CAT may be to preserve intracellular H 2 O 2 concentrations at steady -scale levels ). Li et al (2017) showed that melatonin, a potent long-distance signal, may be translocated from the treated leaves or roots of plant to distant untreated tissues via vascular bundles, leading to systemic induction of different abiotic tolerance. Moreover, studies on how melatonin interacts with stress signaling mechanisms have identified a complex relationship with ROS.…”

Section: Discussionmentioning

confidence: 99%

Alleviation of drought stress by melatonin foliar treatment on two flax varieties under sandy soil

Sadak

Bakry

2020

Physiol Mol Biol Plants

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The role of melatonin treatments on improving plant tolerance against drought stress is clear, while its special role and influences are poorly investigated. Thus, the effect of external treatment with different concentrations (2.5, 5.0 and 7.5 mM) of melatonin on two varieties of flax plant (Letwania-9 and Sakha-2) growth, some biochemical aspects and yield under normal [100% water irrigation requirements (WIR)] and drought stress conditions (75% and 50% WIR) in sandy soil were investigated in this study. Drought stress decreased significantly different growth parameters, photosynthetic pigments, yield and yield components of the two studied flax varieties. While, it increased significantly phenolic contents, total soluble sugars (TSS), proline and free amino acids as well as some antioxidant enzymes (superoxide dismutase, catalase, peroxidase and polyphenol oxidase). Meanwhile, external treatment of melatonin (2.5, 5.0 and 7.5 mM) increased significantly different growth and yield parameters as well as the studied biochemical and physiological aspects under 100% WIR. Also, melatonin treatment could alleviate the adverse effects of drought stress and increased significantly growth parameters, yield and quality of the two varieties of flax plant via improving photosynthetic pigments, indole acetic acid, phenolic, TSS, proline free amino acids contents and antioxidant enzyme systems, as compared with their corresponding untreated controls.Foliar treatment of 5.0 mM melatonin showed the greatest growth, the studied biochemical aspects and yield quantity and quality of Letwania-9 and Sakha-2 varieties of flax plants either at normal irrigation or under stress conditions. Finally we can conclude that, melatonin treatment improved and alleviated the reduced effect of drought stress on growth and yield of two flax varieties through enhancing photosynthetic pigment, osmoptrotectants and antioxidant enzyme systems. 5 mM was the most effective concentration.

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Melatonin application confers enhanced salt tolerance by regulating Na+ and Cl− accumulation in rice

Cited by 87 publications

References 56 publications

Role of melatonin in improving growth, yield quantity and quality of Moringa oleifera L. plant under drought stress

Role of melatonin in improving growth, yield quantity and quality of Moringa oleifera L. plant under drought stress

Melatonin Promotes Seed Germination Under Salt Stress by Regulating ABA and GA3 in Cotton (Gossypium Hirsutum L.)

Alleviation of drought stress by melatonin foliar treatment on two flax varieties under sandy soil

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