Exogenous melatonin-stimulated defense responses in tomato plants treated with polyethylene glycol

Karaca, Perihan; Çekiç, Fazilet Özlem

doi:10.1080/19315260.2019.1575317

Cited by 39 publications

(13 citation statements)

References 30 publications

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“…Among plant growth substances, melatonin (N-acetyl-5-methoxytryptamine) is an amazing and powerful naturally occurring antioxidant that effectively copes with the drastic effects of water deficit in plants [ 16 , 22 ]. Thus, melatonin is strongly recommended to mitigate drought stress in several plant species, including model plants [ 23 , 24 ], field crops [ 25 , 26 ], fruit crops [ 27 , 28 ], vegetable crops [ 29 , 30 ], as well as ornamental and medicinal plants [ 31 , 32 ] ( Table 1 ). Melatonin treatment ranges from a very low concentration (50 nM) in grape [ 33 ] to a high dosage (1 mM) in maize [ 34 ] ( Table 1 ).…”

Section: Melatonin-induced Drought Stress Tolerancementioning

confidence: 99%

Melatonin-Induced Water Stress Tolerance in Plants: Recent Advances

et al. 2020

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Water stress (drought and waterlogging) is severe abiotic stress to plant growth and development. Melatonin, a bioactive plant hormone, has been widely tested in drought situations in diverse plant species, while few studies on the role of melatonin in waterlogging stress conditions have been published. In the current review, we analyze the biostimulatory functions of melatonin on plants under both drought and waterlogging stresses. Melatonin controls the levels of reactive oxygen and nitrogen species and positively changes the molecular defense to improve plant tolerance against water stress. Moreover, the crosstalk of melatonin and other phytohormones is a key element of plant survival under drought stress, while this relationship needs further investigation under waterlogging stress. In this review, we draw the complete story of water stress on both sides—drought and waterlogging—through discussing the previous critical studies under both conditions. Moreover, we suggest several research directions, especially for waterlogging, which remains a big and vague piece of the melatonin and water stress puzzle.

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Section: Melatonin-induced Drought Stress Tolerancementioning

confidence: 99%

Melatonin-Induced Water Stress Tolerance in Plants: Recent Advances

et al. 2020

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“…Melatonin protects the photosynthetic apparatus from the deleterious effects of drought, resulting in the recovery of photosynthetic efficiency of plants [6,51]. Melatonin prevents the degradation of the chlorophyll molecule during drought stress and improves the photosynthesis, transpiration and stomatal conductance [51,88]. Chlorophyll degradation is catalyzed by enzymes such as, chlorophyllase (Chlase), pheophytinase (PPH) and chlorophyll degrading peroxidase (Chl-PRX) [11,89,90,91,92,93].…”

Section: Melatonin Mediated Regulation Of Plant Biology Under Droumentioning

confidence: 99%

Melatonin Mediated Regulation of Drought Stress: Physiological and Molecular Aspects

Sharma

Zheng

2019

Plants

169

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Drought stress adversely effects physiological and biochemical processes of plants, leading to a reduction in plant productivity. Plants try to protect themselves via activation of their internal defense system, but severe drought causes dysfunction of this defense system. The imbalance between generation and scavenging of reactive oxygen species (ROS) leads to oxidative stress. Melatonin, a multifunctional molecule, has the potential to protect plants from the adverse effects of drought stress by enhancing the ROS scavenging efficiency. It helps in protection of photosynthetic apparatus and reduction of drought induced oxidative stress. Melatonin regulates plant processes at a molecular level, which results in providing better resistance against drought stress. In this review, the authors have discussed various physiological and molecular aspects regulated by melatonin in plants under drought conditions, along with their underlying mechanisms.

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“…The photosynthetic performance of plants enhanced by melatonin protects chlorophyll molecules and the chloroplast ultrastructure of plants treated with drought stress [206,207] and regulates photosynthesis by expressing the key gene involved in chlorophyll metabolism in Carya cathayensis (L.) [208]. The increased leaf area in plants treated with melatonin was also involved in improving photosynthesis under water-deficit conditions in Coffea arabica (L.) [209].…”

Section: Photosynthetic Regulation By Melatonin Under Abiotic Stressmentioning

confidence: 98%

Melatonin in Plant Defense against Abiotic Stress

Rehaman

Mishra

Ferdose

et al. 2021

Forests

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Abiotic stress adversely affects plant growth and metabolism and as such reduces plant productivity. Recognized as a major contributor in the production of reactive oxygen species (ROS), it hinders the growth of plants through induction of oxidative stress. Biostimulants such as melatonin have a multifunctional role, acting as a defense strategy in minimizing the effects of oxidative stress. Melatonin plays important role in plant processes ranging from seed germination to senescence, besides performing the function of a biostimulant in improving the plant’s productivity. In addition to its important role in the signaling cascade, melatonin acts as an antioxidant that helps in scavenging ROS, generated as part of different stresses among plants. The current study was undertaken to elaborate the synthesis and regulation of melatonin in plants, besides emphasizing its function under various abiotic stress namely, salt, temperature, herbicides, heavy metals, and drought. Additionally, a special consideration was put on the crosstalk of melatonin with phytohormones to overcome plant abiotic stress.

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Exogenous melatonin-stimulated defense responses in tomato plants treated with polyethylene glycol

Cited by 39 publications

References 30 publications

Melatonin-Induced Water Stress Tolerance in Plants: Recent Advances

Melatonin-Induced Water Stress Tolerance in Plants: Recent Advances

Melatonin Mediated Regulation of Drought Stress: Physiological and Molecular Aspects

Melatonin in Plant Defense against Abiotic Stress

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