Melatonin: A master regulator of plant development and stress responses

Journal of Integrative Plant Biology, Journal Year: 2020, Volume and Issue: 63(1), P. 126 - 145

Published: July 17, 2020

Melatonin is a pleiotropic molecule with multiple functions in plants. Since the discovery of melatonin plants, numerous studies have provided insight into biosynthesis, catabolism, and physiological biochemical this important molecule. Here, we describe biosynthesis from tryptophan, as well its various degradation pathways The identification putative receptor plants has led to hypothesis that hormone involved regulating plant growth, aerial organ development, root morphology, floral transition. universal antioxidant activity role preserving chlorophyll might explain anti-senescence capacity aging leaves. An impressive amount research focused on modulating postharvest fruit ripening by expression ethylene-related genes. Recent evidence also indicated plant's response biotic stress, cooperating other phytohormones well-known molecules such reactive oxygen species nitric oxide. Finally, great progress been made towards understanding how alleviates effects abiotic stresses, including salt, drought, extreme temperature, heavy metal stress. Given diverse roles, propose master regulator

Language: Английский

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Mechanistic insights on melatonin‐mediated drought stress mitigation in plants

Physiologia Plantarum, Journal Year: 2020, Volume and Issue: 172(2), P. 1212 - 1226

Published: Dec. 11, 2020

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

Language: Английский

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Molecular mechanisms of salinity tolerance in rice

The Crop Journal, Journal Year: 2021, Volume and Issue: 9(3), P. 506 - 520

Published: April 20, 2021

Salinity is one of the major abiotic stresses which impose constraints to plant growth and production. Rice (Oryza sativa L.) most important staple food crops a model monocot plant. Its production expanding into regions that are affected by soil salinity, requiring cultivars more tolerant saline conditions. Understanding molecular mechanisms such tolerance could lay foundation for varietal improvement salt in rice. In spite extensive studies exploring mechanism tolerance, there has been limited progress breeding increased salinity tolerance. this review, we summarize information about underlying rice further discuss limitations We show numerous gene families interaction networks involved regulation responses prompting need comprehensive functional analysis. also based on whole-plant level analyses with only few reports focused tissue- and/or cell-specific expression. More details salt-responsive channel transporter activities at still be documented before these traits can incorporated elite germplasm. Thus, future should focus diversity available genetic resources and, particular, wild relatives, re-incorporate lost during domestication.

Language: Английский

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Roles of Plant Growth-Promoting Rhizobacteria (PGPR) in Stimulating Salinity Stress Defense in Plants: A Review

International Journal of Molecular Sciences, Journal Year: 2021, Volume and Issue: 22(6), P. 3154 - 3154

Published: March 19, 2021

To date, soil salinity becomes a huge obstacle for food production worldwide since salt stress is one of the major factors limiting agricultural productivity. It estimated that significant loss crops (20-50%) would be due to drought and salinity. embark upon this harsh situation, numerous strategies such as plant breeding, genetic engineering, large variety practices including applications growth-promoting rhizobacteria (PGPR) seed biopriming technique have been developed improve defense system against stress, resulting in higher crop yields meet human's increasing demand future. In present review, we update discuss advantageous roles beneficial PGPR green bioinoculants mitigating burden high saline conditions on morphological parameters physio-biochemical attributes via diverse mechanisms. addition, useful tool are also updated discussed approach exhibits promising potentials improving vigor, rapid germination, seedling growth uniformity. Furthermore, controversial findings regarding fluctuation antioxidants osmolytes PGPR-treated plants pointed out discussed.

Language: Английский

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Reactive oxygen species: Multidimensional regulators of plant adaptation to abiotic stress and development

Journal of Integrative Plant Biology, Journal Year: 2023, Volume and Issue: 66(3), P. 330 - 367

Published: Dec. 20, 2023

Reactive oxygen species (ROS) are produced as undesirable by-products of metabolism in various cellular compartments, especially response to unfavorable environmental conditions, throughout the life cycle plants. Stress-induced ROS production disrupts normal function and leads oxidative damage. To cope with excessive ROS, plants equipped a sophisticated antioxidative defense system consisting enzymatic non-enzymatic components that scavenge or inhibit their harmful effects on biomolecules. Nonetheless, when maintained at relatively low levels, act signaling molecules regulate plant growth, development, adaptation adverse conditions. Here, we provide an overview current approaches for detecting ROS. We also discuss recent advances understanding signaling, metabolism, roles growth responses abiotic stresses.

Language: Английский

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Molecular Insights into the Role of Reactive Oxygen, Nitrogen and Sulphur Species in Conferring Salinity Stress Tolerance in Plants

Journal of Plant Growth Regulation, Journal Year: 2022, Volume and Issue: 42(2), P. 554 - 574

Published: Feb. 10, 2022

Language: Английский

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Melatonin and Abiotic Stress Tolerance in Crop Plants

International Journal of Molecular Sciences, Journal Year: 2023, Volume and Issue: 24(8), P. 7447 - 7447

Published: April 18, 2023

Increasing food demand by the growing human population and declining crop productivity due to climate change affect global security. To meet challenges, developing improved crops that can tolerate abiotic stresses is a priority. Melatonin in plants, also known as phytomelatonin, an active component of various cellular mechanisms alleviates oxidative damage hence supporting plant survive stress conditions. Exogenous melatonin strengthens this defence mechanism enhancing detoxification reactive by-products, promoting physiological activities, upregulating stress-responsive genes alleviate during stress. In addition its well-known antioxidant activity, protects against regulating hormones, activating ER genes, increasing protein homoeostasis, heat shock transcription factors proteins. Under stress, enhances unfolded response, endoplasmic reticulum-associated degradation, autophagy, which ultimately protect cells from programmed cell death promotes repair resulting increased survival.

Language: Английский

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The role of melatonin in plant growth and metabolism, and its interplay with nitric oxide and auxin in plants under different types of abiotic stress

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Feb. 14, 2023

Melatonin is a pleiotropic signaling molecule that reduces the adverse effects of abiotic stresses, and enhances growth physiological function many plant species. Several recent studies have demonstrated pivotal role melatonin in functions, specifically its regulation crop yield. However, comprehensive understanding melatonin, which regulates yield under stress conditions, not yet available. This review focuses on progress research biosynthesis, distribution, metabolism multiple complex functions plants mechanisms grown stresses. In this review, we focused enhancement yield, elucidated interactions with nitric oxide (NO) auxin (IAA, indole-3-acetic acid) when are various The present revealed endogenousapplication to plants, NO IAA, enhanced interaction regulated morphophysiological biochemical activities, mediated by G protein-coupled receptor synthesis genes. IAA increasing levels synthesis, polar transport. Our aim was provide performance and, therefore, further explicate hormones use regulate

Language: Английский

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Transport of Nanoparticles into Plants and Their Detection Methods

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(2), P. 131 - 131

Published: Jan. 5, 2024

Nanoparticle transport into plants is an evolving field of research with diverse applications in agriculture and biotechnology. This article provides overview the challenges prospects associated nanoparticles plants, focusing on delivery methods detection within plant tissues. Passive assisted methods, including use roots leaves as introduction sites, are discussed, along their respective advantages limitations. The barriers encountered nanoparticle to highlighted, emphasizing need for innovative approaches (e.g., stem a new recognition site) optimize efficiency. In recent years, efforts have intensified, leading evendeeper understanding intricate mechanisms governing interaction nanomaterials tissues cells. Investigations uptake pathways translocation revealed nuanced responses different types nanoparticles. Additionally, this delves importance studying localization quantification Various techniques presented valuable tools comprehensively nanoparticle–plant interactions. reliance multiple data validation emphasized enhance reliability findings. future outlooks explored, potential alternative such stems, continued development formulations that improve adhesion penetration. By addressing these fostering multidisciplinary research, poised make significant contributions sustainable environmental management.

Language: Английский

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Phytomelatonin: A key regulator of redox and phytohormones signaling against biotic/abiotic stresses

Redox Biology, Journal Year: 2023, Volume and Issue: 64, P. 102805 - 102805

Published: June 30, 2023

Plants being sessile in nature, are exposed to unwarranted threats as a result of constantly changing environmental conditions. These adverse factors can have negative impacts on their growth, development, and yield. Hormones key signaling molecules enabling cells respond rapidly different external internal stimuli. In plants, melatonin (MT) plays critical role the integration various signals activation stress-response networks develop defense mechanisms plant resilience. Additionally, tackle stress-induced alteration cellular redox equilibrium by regulating expression hemostasis-related genes proteins. The purpose this article is compile summarize scientific research pertaining MT's effects plants' resilience biotic abiotic stresses. Here, we summarized that MT exerts synergistic effect with other phytohormones, for instance, ethylene, jasmonic acid, salicylic activates defense-related against phytopathogens. Furthermore, interacts secondary messengers like Ca2+, nitric oxide, reactive oxygen species regulate network. This interaction triggers transcription alleviate stress-related responses plants. Hence, synergic diverse hormones demonstrates phytomelatonin's importance influencing multiple contribute harsh factors.

Language: Английский

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