Melatonin: A master regulator of plant development and stress responses

Sun, Chengliang; Liu, Lijuan; Wang, Luxuan; Li, Baohai; Jin, Cuihong; Lin, Xianyong

doi:10.1111/jipb.12993

Cited by 281 publications

(221 citation statements)

References 215 publications

(629 reference statements)

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“…Melatonin (N-acetyl-5-methoxy tryptamine) is a ubiquitous molecule and most probably synthesized in chloroplasts and mitochondria and then translocated to other plant parts Hernández-Ruiz, 2014, 2019;Kołodziejczyk and Posmyk, 2016;Sun et al, 2020). In plants, HA performs various biological functions, such as signaling molecule stimulation, photo response regulation, stress tolerance, and circadian rhythm (Reiter et al, 2015;Hu et al, 2016;Nawaz et al, 2016).…”

Section: Biodegradable and Biostimulant Compounds Boost Plant Health And Significantly Improve The Process Of Photosynthesismentioning

confidence: 99%

Mechanisms Regulating the Dynamics of Photosynthesis Under Abiotic Stresses

et al. 2021

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Photosynthesis sustains plant life on earth and is indispensable for plant growth and development. Factors such as unfavorable environmental conditions, stress regulatory networks, and plant biochemical processes limits the photosynthetic efficiency of plants and thereby threaten food security worldwide. Although numerous physiological approaches have been used to assess the performance of key photosynthetic components and their stress responses, though, these approaches are not extensive enough and do not favor strategic improvement of photosynthesis under abiotic stresses. The decline in photosynthetic capacity of plants due to these stresses is directly associated with reduction in yield. Therefore, a detailed information of the plant responses and better understanding of the photosynthetic machinery could help in developing new crop plants with higher yield even under stressed environments. Interestingly, cracking of signaling and metabolic pathways, identification of some key regulatory elements, characterization of potential genes, and phytohormone responses to abiotic factors have advanced our knowledge related to photosynthesis. However, our understanding of dynamic modulation of photosynthesis under dramatically fluctuating natural environments remains limited. Here, we provide a detailed overview of the research conducted on photosynthesis to date, and highlight the abiotic stress factors (heat, salinity, drought, high light, and heavy metal) that limit the performance of the photosynthetic machinery. Further, we reviewed the role of transcription factor genes and various enzymes involved in the process of photosynthesis under abiotic stresses. Finally, we discussed the recent progress in the field of biodegradable compounds, such as chitosan and humic acid, and the effect of melatonin (bio-stimulant) on photosynthetic activity. Based on our gathered researched data set, the logical concept of photosynthetic regulation under abiotic stresses along with improvement strategies will expand and surely accelerate the development of stress tolerance mechanisms, wider adaptability, higher survival rate, and yield potential of plant species.

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Section: Biodegradable and Biostimulant Compounds Boost Plant Health And Significantly Improve The Process Of Photosynthesismentioning

confidence: 99%

Mechanisms Regulating the Dynamics of Photosynthesis Under Abiotic Stresses

et al. 2021

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“…It mediates various morphological changes in the plant under drought stress (Sun et al, 2020). Debnath et al (2019)…”

Section: Melatonin-mediated Regulation Of Plant Development Under Drought Stressmentioning

confidence: 99%

“…Melatonin is a key regulator that acts as a potential modulator on plant growth and development. It mediates various morphological changes in the plant under drought stress (Sun et al, 2020). Debnath et al (2019) reviewed the synergistic role of melatonin and auxin in the growth and development of the crop plants.…”

Section: Melatonin‐mediated Regulation Of Plant Development Under Drought Stressmentioning

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). Melatonin regulates rhizogenesis (formation of lateral root and root primordia), carbon assimilation, stomatal conductance, photochemical efficiency of the photosystems, accumulation of RuBisCO, catabolism of chlorophyll molecules, and the ascorbate‐glutathione (AsA‐GSH) cycle in stress‐affected plants (Liang et al, 2019; Moustafa‐Farag et al, 2019).…”

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

166

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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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“…In general, the mechanisms that involve MET in the tolerance to metal toxicity are similar (Figure 1), although some MET-induced mechanisms are specific to a certain type of contaminants and plant species, which will be specifically described below. Thus, MET application improves photosynthesis efficiency, regulates metal transport and plant vegetative growth processes, decreases ROS and RNS levels and oxidative damage, and upregulates stress tolerance-related genes [43].…”

Section: Roles Of Met In Metal Toxicity Tolerancementioning

confidence: 99%

ROS and NO Phytomelatonin-Induced Signaling Mechanisms Under Metal Toxicity in Plants: A Review

Pardo-Hernández¹,

López-Delacalle²,

Marti-Guillen³

et al. 2021

Preprint

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Metal toxicity in soils, along with water runoff, are increasing environmental problems that affect agriculture directly and, in turn, human health. In light of finding a suitable and urgent solution, research on plant treatments with specific compounds that can help mitigate these effects has increased, and thus the exogenous application of melatonin (MET) and its role in alleviating the negative effects of metal toxicity in plants, have become more important in the last few years. MET is an important plant-related response molecule involved in growth, development, and reproduction, and in the induction of different stress-related key factors in plants. It has been shown that MET plays a protective role against the toxic effects induced by different metals (Pb, Cd, Cu, Zn, B, Al, V, Ni, La, As, and Cr) by regulating both the enzymatic and non-enzymatic antioxidant plant defense systems. In addition, MET interacts with many other signaling molecules, such as reactive oxygen species (ROS) and nitric oxide (NO), and participates in a wide variety of physiological reactions. Furthermore, MET treatment enhances osmoregulation and photosynthetic efficiency and increases the concentration of other important antioxidants such as phenolic compounds, flavonoids, polyamines (PAs), and carotenoid compounds. Some recent studies have shown that MET appeared to be involved in the regulation of metal transport in plants, and lastly, various studies have confirmed that MET significantly upregulated stress tolerance-related genes. Despite all the knowledge acquired over the years, there is still more to know about how MET is involved in the metal toxicity tolerance of plants.

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Melatonin: A master regulator of plant development and stress responses

Cited by 281 publications

References 215 publications

Mechanisms Regulating the Dynamics of Photosynthesis Under Abiotic Stresses

Mechanisms Regulating the Dynamics of Photosynthesis Under Abiotic Stresses

Mechanistic insights on melatonin‐mediated drought stress mitigation in plants

ROS and NO Phytomelatonin-Induced Signaling Mechanisms Under Metal Toxicity in Plants: A Review

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