Emerging roles of melatonin in mitigating abiotic and biotic stresses of horticultural crops

Tiwari, Rahul Kumar; Lal, Milan Kumar; Naga, Kailash Chandra; Kumar, Ravinder; Chourasia, Kumar Nishant; Subhash, S.; Kumar, Dharmendra; Sharma, Sanjeev

doi:10.1016/j.scienta.2020.109592

Cited by 123 publications

(35 citation statements)

References 70 publications

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“…Plants are sessile and exposed to various environmental factors including biotic and abiotic stresses. The antioxidant and tolerance mechanism at the cellular and molecular level regulates these stresses in plants (Tiwari et al, 2020). Drought stress in plants can lead to the disruption of the membrane system, which ultimately imbalances the redox homeostasis and thus alters physiological and biochemical processes (Sattar et al, 2020).…”

Section: Melatonin-mediated Physiological Regulation Of Plants Under Drought Stressmentioning

confidence: 99%

“…Hormonal cross-talk involving melatonin and other phytohormones (abscisic acid, auxin, cytokinins and gibberellins) is also reported as a key mechanism of stress regulation (Tiwari et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, melatonin is emerging as a multifunctional phyotoprotectant biomolecule in ameliorating abiotic and biotic stresses of crop plants (Liu et al, 2020; Tiwari et al, 2020). Melatonin (N‐acetyl‐5‐methoxytryptamine) is a well‐known antioxidant in plants, which is documented to improve the tolerance of heat stress (Ahammed et al, 2019), drought (Dai et al, 2020), heavy metals (Sun et al, 2020), salinity (Michard & Simon, 2020), chilling (Ding et al, 2017), and viral and fungal infections (Moustafa‐Farag et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the role of nitric acid (NO) and hydrogen sulfide has also been established in melatonin‐mediated downstream signaling for stress management in plants (Kaya, Senbayram, et al, 2020). Hormonal cross‐talk involving melatonin and other phytohormones (abscisic acid, auxin, cytokinins and gibberellins) is also reported as a key mechanism of stress regulation (Tiwari et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Mechanistic insights on melatonin‐mediated drought stress mitigation in plants

Tiwari

Lal

Kumar

et al. 2021

Physiologia Plantarum

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144

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Drought stress imposes a serious threat to crop productivity and nutritional security.Drought adaptation mechanisms involve complex regulatory network comprising of various sensory and signaling molecules. In this context, melatonin has emerged as a potential signaling molecule playing a crucial role in imparting stress tolerance in plants. Melatonin pretreatment regulates various plant physiological processes such as osmoregulation, germination, photosynthesis, senescence, primary/secondary metabolism, and hormonal cross-talk under water deficit conditions. Melatoninmediated regulation of ascorbate-glutathione (AsA-GSH) cycle plays a crucial role to scavenge reactive oxygen species generated in the cells during drought. Here, in this review, the current knowledge on the role of melatonin to ameliorate adverse effects of drought by modulating morphological, physiological, and redox regulatory processes is discussed. The role of melatonin to improve water absorption capacity of roots by regulating aquaporin channels and hormonal cross-talk involved in drought stress mitigation are also discussed. Overall, melatonin is a versatile bio-molecule involved in growth promotion and yield enhancement under drought stress that makes it a suitable candidate for eco-friendly crop production to ensure food security.

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Section: Melatonin-mediated Physiological Regulation Of Plants Under Drought Stressmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanistic insights on melatonin‐mediated drought stress mitigation in plants

Tiwari

Lal

Kumar

et al. 2021

Physiologia Plantarum

Self Cite

144

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“…Horticultural crops are major sources of food and feed, which face a number of environmental challenges from fungal, bacterial or viral infections. Melatonin regulates anti-stress mechanisms to make these horticultural crops stress-free with high quality production rates [113].…”

Section: Role Of Melatonin In Crop Improvementmentioning

confidence: 99%

Melatonin as Master Regulator in Plant Growth, Development and Stress Alleviator for Sustainable Agricultural Production: Current Status and Future Perspectives

et al. 2020

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Melatonin, a multifunctional signaling molecule, is ubiquitously distributed in different parts of a plant and responsible for stimulating several physiochemical responses against adverse environmental conditions in various plant systems. Melatonin acts as an indoleamine neurotransmitter and is primarily considered as an antioxidant agent that can control reactive oxygen and nitrogen species in plants. Melatonin, being a signaling agent, induces several specific physiological responses in plants that might serve to enhance photosynthesis, growth, carbon fixation, rooting, seed germination and defense against several biotic and abiotic stressors. It also works as an important modulator of gene expression related to plant hormones such as in the metabolism of indole-3-acetic acid, cytokinin, ethylene, gibberellin and auxin carrier proteins. Additionally, the regulation of stress-specific genes and the activation of pathogenesis-related protein and antioxidant enzyme genes under stress conditions make it a more versatile molecule. Because of the diversity of action of melatonin, its role in plant growth, development, behavior and regulation of gene expression it is a plant’s master regulator. This review outlines the main functions of melatonin in the physiology, growth, development and regulation of higher plants. Its role as anti-stressor agent against various abiotic stressors, such as drought, salinity, temperatures, UV radiation and toxic chemicals, is also analyzed critically. Additionally, we have also identified many new aspects where melatonin may have possible roles in plants, for example, its function in improving the storage life and quality of fruits and vegetables, which can be useful in enhancing the environmentally friendly crop production and ensuring food safety.

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Melatonin as a plant biostimulant in crops and during post‐harvest: a new approach is needed

Arnao

Hernández‐Ruíz²

2021

J Sci Food Agric

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A great amount of data covering a wide variety of plant species and experimental conditions has demonstrated the beneficial actions that melatonin exerts on many aspects of plant development, including germination, photosynthesis and water economy. Melatonin behaves especially well as a plant biostimulator against biotic and abiotic stressors, increasing stress tolerance. The present contribution sets out possible future multidisciplinary studies, in which the impact of using melatonin with respect to agriculture, food technology, human nutrition and the environment needs to be clearly established. In crops, the effective dose and best formulations for individual plant species and cultivation conditions should be studied. As regards post-harvest, the focus should be on the half-life time of melatonin in fruits and water-residue treatments. Detailed studies are lacking on the human intake of phytomelatonin in different diets. Studies on the metabolization of phytomelatonin and the combined effect with other phytonutrients such as carotenoids, chlorophylls, flavonoids, fibers, etc., would also be of interest. In soils, the possible interaction between melatonin and microbiome and non-vertebrate animals is of primordial interest. In terms of the environment, although melatonin is classified as a non-hazardous agent, its limitations as a possible animal hormone disruptor have been suggested. Specific studies on the permanence of melatonin in plant tissues, plant by-products, soil, freshwater and honeybees, amongst others, are proposed to obtain crucial information.

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Emerging roles of melatonin in mitigating abiotic and biotic stresses of horticultural crops

Cited by 123 publications

References 70 publications

Mechanistic insights on melatonin‐mediated drought stress mitigation in plants

Mechanistic insights on melatonin‐mediated drought stress mitigation in plants

Melatonin as Master Regulator in Plant Growth, Development and Stress Alleviator for Sustainable Agricultural Production: Current Status and Future Perspectives

Melatonin as a plant biostimulant in crops and during post‐harvest: a new approach is needed

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