Application of Melatonin-Enhanced Tolerance to High-Temperature Stress in Cherry Radish (Raphanus sativus L. var. radculus pers)

Cui, Jia; Yu, Xiang; Zhang, Min; Zou, Peng; Jun, Ma; Xu, Yongbin

doi:10.1007/s00344-019-10006-1

Cited by 46 publications

(23 citation statements)

References 48 publications

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“…The treatment with MT of wheat seedlings under high-temperature HS resulted in a sharp decrease in H 2 O 2 ( Figure 2 A). These results are consistent with previous findings in kiwifruit [ 44 ] and cucumber [ 43 ], among others [ 46 , 47 , 48 ]. The results can be partly attributed to the fact that MT is a free radical scavenger and a broad-spectrum antioxidant, and it can eradicate ROS involved in cellular disfunction, as displayed in Figure 8 .…”

Section: Discussionsupporting

confidence: 94%

“…With respect to the role of melatonin in heat tolerance, many studies reported that exogenous treatment with MT enhances tomato seedling tolerance to high temperatures by improving their antioxidant defense system [ 39 , 40 , 41 , 42 ]. Furthermore, in cucumber [ 43 ], kiwifruit [ 44 ], onion, leek [ 45 ], maize [ 46 , 47 ], and radish [ 48 ], a protective effect of MT against HS was described.…”

Section: Introductionmentioning

confidence: 99%

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Melatonin Suppressed the Heat Stress-Induced Damage in Wheat Seedlings by Modulating the Antioxidant Machinery

Buttar

Arnao

et al. 2020

Plants

108

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Melatonin (N-acetyl-5-methoxytryptamine) is a pleiotropic signaling molecule that plays a crucial role in the regulation of various environmental stresses, including heat stress (HS). In this study, a 100 μM melatonin (MT) pretreatment followed by exposure to heat stress for different time periods was found to efficiently reduce oxidative stress by preventing the over-accumulation of hydrogen peroxide (H2O2), lowering the lipid peroxidation content (malondialdehyde (MDA) content), and increasing proline (Pro) biosynthesis. Moreover, the activities of antioxidant enzymes, such as superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD), were increased substantially in MT-pretreated wheat seedlings. The presence of MT significantly improved the heat tolerance of wheat seedlings by modulating their antioxidant defense system, activating the ascorbate–glutathione (AsA–GSH) cycle comprising ascorbate peroxidase (APX), and increasing glutathione reductase (GR) activities. It also held the photosynthetic machinery stable by increasing the chlorophyll content. Enhancement in the endogenous MT contents was also observed in the MT+HS-treated plants. Furthermore, the expression of reactive oxygen species (ROS)-related genes TaSOD, TaPOD, and TaCAT, and anti-stress responsive genes, such as TaMYB80, TaWRKY26, and TaWRKY39, was also induced in MT-treated seedlings. Due to these notable changes, an improvement in stress resistance was observed in MT-treated seedlings compared with control. Taken together, our findings suggest that MT can play a key role in boosting the stress tolerance of plants by modulating the antioxidant defense system and regulating the transcription of stress-responsive genes.

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Section: Discussionsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Melatonin Suppressed the Heat Stress-Induced Damage in Wheat Seedlings by Modulating the Antioxidant Machinery

Buttar

Arnao

et al. 2020

Plants

108

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“…Melatonin also effectively protected melon roots against cooper stress ( Hu et al, 2020 ), strawberry seedlings against Cd stress ( Wu S. et al, 2020 ), and tomato seedlings against nickel stress ( Jahan et al, 2020 ). In addition, it protected cherry radish ( Raphanus sativus L.) against high temperature ( Jia et al, 2020 ), and tomato plants ( S. lycopersicum ) against chilling ( Wang M. et al, 2020 ). It was suggested that the protective role of melatonin is due to the regulation of the antioxidant defence system, from direct ROS scavenging by reaction with H 2 O 2 , O 2 – , and OH ⋅ , to an increase in the activity of antioxidant enzymes (CAT, SOD, and GPX), as well as enzymes of the ascorbate-glutathione cycle (ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase, and glutathione reductase).…”

Section: Amino Acids and Other N -Containing Compomentioning

confidence: 99%

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

et al. 2020

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Biostimulants (BSs) are probably one of the most promising alternatives nowadays to cope with yield losses caused by plant stress, which are intensified by climate change. Biostimulants comprise many different compounds with positive effects on plants, excluding pesticides and chemical fertilisers. Usually mixtures such as lixiviates from proteins or algal extracts have been used, but currently companies are interested in more specific compounds that are capable of increasing tolerance against abiotic stress. Individual application of a pure active compound offers researchers the opportunity to better standarise formulations, learn more about the plant defence process itself and assist the agrochemical industry in the development of new products. This review attempts to summarise the state of the art regarding various families of organic compounds and their mode/mechanism of action as BSs, and how they can help maximise agricultural yields under stress conditions aggravated by climate change.

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“…radculus pers), which increased the biomass to 12.9% and the soluble protein to 18.7%. At the same time, the activity of antioxidant enzyme, especially for POD, was enhanced and the lipid peroxidation was reduced under adverse conditions [54]. For melatonin-regulated plant cold tolerance, Lei et al [55] found that very low concentration of exogenous melatonin (21.5 nmol L −1 ) could significantly Review of Melatonin in Horticultural Crops DOI: http://dx.doi.org /10.5772/intechopen.90935 improve the cell viability of carrots, under low-temperature stress, enhance the stability of cell membrane structure, and inhibit orderly degradation of DNA caused by programmed cell death.…”

Section: Regulation Of Melatonin Resistance To Abiotic Stressmentioning

confidence: 98%

Review of Melatonin in Horticultural Crops

Yan¹,

Shi²,

Gong³

2020

Melatonin - The Hormone of Darkness and Its Therapeutic Potential and Perspectives

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Melatonin is an indoleamine, abundant in animals and plants, which has the functions of regulating circadian rhythm, improving immunity and anti-aging in animals, and is a good health care product beneficial to human health. Recent studies have shown that melatonin has physiological functions including regulating plant growth, promoting seed germination, controlling root development and delaying leaf senescence. The antioxidant properties of melatonin give it the ability to strengthen plants' resistance to stress. The comprehensive researches in recent years, involving five aspects of "the biosynthetic pathway of melatonin in plants, the melatonin in horticultural crops and its influencing factors, the roles of melatonin in the growth and development of horticultural crops, in the response to stress of horticultural crops, the signal transduction network of melatonin in regulating plant growth and the development and stress resistance," are reviewed in the present paper. The application of melatonin in horticulture production is also discussed, which can provide a theoretical reference for the application of melatonin in horticultural production. DOI: http://dx.doi.org/10.5772/intechopen.90935 excess ROS to reduce the oxidation of cells. However, a recent study in rice (Oryza sativa L.) has shown that the key melatonin synthesis gene COMT is located in plant chloroplasts and has demonstrated that melatonin synthesis is increased through the 5-MT pathway [8]. CAND2/PMTR1, a hypothetic plant melatonin receptor, recently has been identified in Arabidopsis thaliana [9]. It is located in the plasma membrane with a receptor-like topology and interacts with the G-protein subunit (GPA1), while expression in different tissues is induced by melatonin. The binding of plant melatonin receptors triggers Gγb and Gα activation of NADPH oxidasedependent H 2 O 2 production (RBOH), increasing Ca 2+ inflow, promoting K + outflow, and ultimately leading to stomatal closure [10]. The cloning of these melatoninmetabolizing genes and the discovery of the receptors can lay a certain foundation for the study of melatonin-related functions in the future. Review of Melatonin in Horticultural Crops Concentrations of melatonin in horticultural crops and its influential factors

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Application of Melatonin-Enhanced Tolerance to High-Temperature Stress in Cherry Radish (Raphanus sativus L. var. radculus pers)

Cited by 46 publications

References 48 publications

Melatonin Suppressed the Heat Stress-Induced Damage in Wheat Seedlings by Modulating the Antioxidant Machinery

Melatonin Suppressed the Heat Stress-Induced Damage in Wheat Seedlings by Modulating the Antioxidant Machinery

Pure Organic Active Compounds Against Abiotic Stress: A Biostimulant Overview

Review of Melatonin in Horticultural Crops

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