Melatonin: Role in Abiotic Stress Resistance and Tolerance

Shafi, Amrina; Singh, Anil Kumar; Zahoor, Insha

doi:10.1007/978-3-030-61153-8_12

Cited by 16 publications

(10 citation statements)

References 158 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the contrary, SA and MT applications under salinity conditions stabilized membranes and significantly decreased the solute leakage ( Figure 5 a,b), indicating that these treatments may be able to repair the disrupted cellular membrane and reduce salt-induced oxidative damage. This finding is in line with the broad spectrum antioxidative properties of SA and MT, which are capable of directly scavenging ROS [ 18 , 30 ]. Furthermore, as shown in Figure 5 c, higher ROS production in salt-stressed plants increased LOX activity, whereas SA and MT treatments diminished oxidative injuries via decreasing oxidative activity.…”

Section: Discussionsupporting

confidence: 71%

“…Several studies have demonstrated that SA can operate directly as an antioxidant to scavenge the ROS or indirectly by regulating redox balance [ 18 , 19 , 21 ], thereby alleviating salt stress injury. Likewise, MT serves as an effective endogenous-free radical scavenger that directly removes ROS or as an antioxidant to regulate the transcription levels of genes related to the antioxidant system [ 9 , 26 , 30 ]. Other reports revealed that SA and MT might exert their roles in maintaining ion homeostasis by regulating ROS production [ 9 , 10 , 19 ].…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, MT can induce tolerance to salt stress, and this phenomenon has been reported in several plant species, such as rice [ 9 ], wheat [ 24 ], melon [ 25 ], naked oat [ 26 ], tomato [ 27 ], strawberry [ 28 ], and maize [ 29 ]. The evidence indicates that the exogenous application of MT enhances plant salt tolerance by scavenging ROS, improving photosynthetic efficiency, inducing nitrogen metabolism, and regulating stress-related transcription factors [ 22 , 23 , 30 ]. There is also evidence that MT maintains Na + /K + homeostasis under salt stress through increasing both the root H + -pump activity and Na + /K + transporter sensitivity to ROS and RNS [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synergistic Effects of Salicylic Acid and Melatonin on Modulating Ion Homeostasis in Salt-Stressed Wheat (Triticum aestivum L.) Plants by Enhancing Root H+-Pump Activity

Talaat

Shawky

2022

Plants

View full text Add to dashboard Cite

Salicylic acid (SA) and melatonin (MT) have been shown to play important roles in plant salt tolerance. However, the underlying mechanisms of SA–MT-interaction-mediated ionic homeostasis in salt-stressed plants are unknown. As a first investigation, this study aimed to clarify how SA–MT interaction affects H+-pump activity in maintaining the desired ion homeostasis under saline conditions and its relation to ROS metabolism. Wheat (Triticum aestivum L.) plants were grown under non-saline or saline conditions and were foliar sprayed with 75 mg L−1 SA or 70 μM MT. The SA+MT combined treatment significantly increased N, P, K+, Fe, Zn, and Cu acquisition, accompanied by significantly lower Na+ accumulation in salt-stressed plants compared to non-stressed ones. Additionally, it significantly enhanced ATP content and H+-pump activity of the roots. The mitigation was also detected in the reduced superoxide radical content, electrolyte leakage, and lipoxygenase activity, as well as increased superoxide dismutase, catalase, peroxidase, and polyphenol oxidase activities; K+/Na+, Ca2+/Na+, and Mg2+/Na+ ratios; relative water content; membrane stability index; and free amino acid accumulation in treated plants. The novel evidence shows that the higher root H+-pump activity in treated plants is a tolerance mechanism that increases the salt tolerance via maintaining ionic homeostasis.

show abstract

Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synergistic Effects of Salicylic Acid and Melatonin on Modulating Ion Homeostasis in Salt-Stressed Wheat (Triticum aestivum L.) Plants by Enhancing Root H+-Pump Activity

Talaat

Shawky

2022

Plants

View full text Add to dashboard Cite

show abstract

“…It is a small molecular weight indoleamine hormone explicitly being measured as a candidate phytohormone due to its various responses under biotic and abiotic stresses. Its level increases upon plant’s exposure to abiotic stresses and it scavenges ROS molecules and enhances activity of antioxidant enzyme, content of metabolite, photosynthetic efficiency and regulates stress transcription features and other metabolites and signalling molecules [ 83 ]. However, the information on how melatonin regulates carbohydrate metabolism and photosynthesis in heat stress in wheat and its interplay with H 2 S in this mechanism is scanty.…”

Section: Discussionmentioning

confidence: 99%

The Crosstalk of Melatonin and Hydrogen Sulfide Determines Photosynthetic Performance by Regulation of Carbohydrate Metabolism in Wheat under Heat Stress

Iqbal

Fatma

Gautam

et al. 2021

Plants

View full text Add to dashboard Cite

Photosynthesis is a pivotal process that determines the synthesis of carbohydrates required for sustaining growth under normal or stress situation. Stress exposure reduces the photosynthetic potential owing to the excess synthesis of reactive oxygen species that disturb the proper functioning of photosynthetic apparatus. This decreased photosynthesis is associated with disturbances in carbohydrate metabolism resulting in reduced growth under stress. We evaluated the importance of melatonin in reducing heat stress-induced severity in wheat (Triticum aestivum L.) plants. The plants were subjected to 25 °C (optimum temperature) or 40 °C (heat stress) for 15 days at 6 h time duration and then developed the plants for 30 days. Heat stress led to oxidative stress with increased production of thiobarbituric acid reactive substances (TBARS) and hydrogen peroxide (H2O2) content and reduced accrual of total soluble sugars, starch and carbohydrate metabolism enzymes which were reflected in reduced photosynthesis. Application of melatonin not only reduced oxidative stress through lowering TBARS and H2O2 content,augmenting the activity of antioxidative enzymes but also increased the photosynthesis in plant and carbohydrate metabolism that was needed to provide energy and carbon skeleton to the developing plant under stress. However, the increase in these parameters with melatonin was mediated via hydrogen sulfide (H2S), as the inhibition of H2S by hypotaurine (HT; H2S scavenger) reversed the ameliorative effect of melatonin. This suggests a crosstalk of melatonin and H2S in protecting heat stress-induced photosynthetic inhibition via regulation of carbohydrate metabolism.

show abstract

“…It is a small molecular weight indoleamine hormone explicitly being measured as a candidate phytohormone due to its various responses under biotic and abiotic stresses. Its' level increases upon plant's exposure to abiotic stresses and it scavenges ROS molecules and enhances activity of antioxidant enzyme, content of metabolite, photosynthetic efficiency and regulates stress transcription features and other metabolites and signalling molecules [76]. However, the information on how melatonin regulates carbohydrate metabolism and photosynthesis in heat stress in wheat and its interplay with H2S in this mechanism is scanty.…”

Section: Discussionmentioning

confidence: 99%

The Crosstalk of Melatonin and Hydrogen Sulfide Determines Photosynthetic Performance by Regulation of Carbohydrate Metabolism in Wheat under Heat Stress

Iqbal¹,

Fatma²,

Gautam³

et al. 2021

Preprint

View full text Add to dashboard Cite

Photosynthesis is a pivotal process that determines the synthesis of carbohydrates required for sustaining growth under normal or stress situation. Stress exposure reduces the photosynthetic potential owing to the excess synthesis of reactive oxygen species that disturb the proper functioning of photosynthetic apparatus. This decreased photosynthesis is associated with disturbances in carbohydrate metabolism resulting in reduced growth under stress. We evaluated the importance of melatonin in reducing heat stress-induced severity in wheat plants (Triticum aestivum L.). The plants were subjected to 25 ˚C (optimum temperature) or 40 ˚C (heat stress) for 15 days at 6 hours time duration and then developed the plants for 30 days. Heat stress led to oxidative stress with increased production of TBARS and H2O2 content and reduced accrual of total soluble sugars, starch and carbohydrate metabolism enzymes which are reflected in reduced photosynthesis. Application of melatonin not only reduced oxidative stress through lowering TBARS and H2O2 content, through augmenting the activity of antioxidative enzymes but also increased the photosynthesis in plant and carbohydrate metabolism that is needed to provide energy and carbon skeleton to the developing plant under stress. However, the increase in these parameters with melatonin was mediated via hydrogen sulfide (H2S), as the inhibition of H2S by hypotaurine (HT; H2S inhibitor) reversed the ameliorative effect of melatonin. This suggests a crosstalk of melatonin and H2S in protecting heat stress-induced photosynthetic inhibition via regulation of carbohydrate metabolism.

show abstract

Melatonin: Role in Abiotic Stress Resistance and Tolerance

Cited by 16 publications

References 158 publications

Synergistic Effects of Salicylic Acid and Melatonin on Modulating Ion Homeostasis in Salt-Stressed Wheat (Triticum aestivum L.) Plants by Enhancing Root H+-Pump Activity

Synergistic Effects of Salicylic Acid and Melatonin on Modulating Ion Homeostasis in Salt-Stressed Wheat (Triticum aestivum L.) Plants by Enhancing Root H+-Pump Activity

The Crosstalk of Melatonin and Hydrogen Sulfide Determines Photosynthetic Performance by Regulation of Carbohydrate Metabolism in Wheat under Heat Stress

The Crosstalk of Melatonin and Hydrogen Sulfide Determines Photosynthetic Performance by Regulation of Carbohydrate Metabolism in Wheat under Heat Stress

Contact Info

Product

Resources

About