Reactive Oxygen Species and Antioxidant Defense in Plants under Abiotic Stress: Revisiting the Crucial Role of a Universal Defense Regulator

Antioxidants, Journal Year: 2020, Volume and Issue: 9(8), P. 681 - 681

Published: July 29, 2020

Global climate change and associated adverse abiotic stress conditions, such as drought, salinity, heavy metals, waterlogging, extreme temperatures, oxygen deprivation, etc., greatly influence plant growth development, ultimately affecting crop yield quality, well agricultural sustainability in general. Plant cells produce radicals their derivatives, so-called reactive species (ROS), during various processes with stress. Moreover, the generation of ROS is a fundamental process higher plants employs to transmit cellular signaling information response changing environmental conditions. One most crucial consequences disturbance equilibrium between antioxidant defense systems triggering excessive accumulation inducing oxidative plants. Notably, detoxification maintained by both enzymatic nonenzymatic under harsh stresses. Although this field research has attracted massive interest, it largely remains unexplored, our understanding poorly understood. In review, we have documented recent advancement illustrating harmful effects ROS, system involved different stresses, molecular cross-talk other important signal molecules nitrogen, sulfur, carbonyl species. addition, state-of-the-art approaches ROS-mediated improvement acclimation against stresses also been discussed.

Language: Английский

---

Photosynthetic Response of Plants Under Different Abiotic Stresses: A Review

Journal of Plant Growth Regulation, Journal Year: 2019, Volume and Issue: 39(2), P. 509 - 531

Published: Aug. 19, 2019

Language: Английский

---

Melatonin and its relationship to plant hormones

Annals of Botany, Journal Year: 2017, Volume and Issue: 121(2), P. 195 - 207

Published: Aug. 17, 2017

Plant melatonin appears to be a multi-regulatory molecule, similar those observed in animals, with many specific functions plant physiology. In recent years, the number of studies on plants has increased significantly. One most studied actions is its effect biotic and abiotic stress, such as that produced by drought, extreme temperatures, salinity, chemical pollution UV radiation, among others.

Language: Английский

---

Climate change regulated abiotic stress mechanisms in plants: a comprehensive review

Plant Cell Reports, Journal Year: 2021, Volume and Issue: 41(1), P. 1 - 31

Published: Aug. 5, 2021

Language: Английский

---

Regulation of ROS Metabolism in Plants under Environmental Stress: A Review of Recent Experimental Evidence

International Journal of Molecular Sciences, Journal Year: 2020, Volume and Issue: 21(22), P. 8695 - 8695

Published: Nov. 18, 2020

Various environmental stresses singly or in combination generate excess amounts of reactive oxygen species (ROS), leading to oxidative stress and impaired redox homeostasis. Generation ROS is the obvious outcome abiotic gaining importance not only for their ubiquitous generation subsequent damaging effects plants but also diversified roles signaling cascade, affecting other biomolecules, hormones concerning growth, development, regulation tolerance. Therefore, a good balance between antioxidant defense system protects photosynthetic machinery, maintains membrane integrity, prevents damage nucleic acids proteins. Notably, scavenges regulates titer signaling. A glut studies have been executed over last few decades discover pattern scavenging. Reports suggested sharp threshold level being beneficial toxic, depending on plant species, growth stages, types stresses, intensity, duration. Approaches towards enhancing one vital areas research biologists. this review, we accumulated discussed physicochemical basis production, cellular compartment-specific pathways, possible distressing effects. Moreover, function detoxification homeostasis maximizing light latest endeavors experimental evidence.

Language: Английский

---

Exogenous Melatonin Alleviates Oxidative Damages and Protects Photosystem II in Maize Seedlings Under Drought Stress

Frontiers in Plant Science, Journal Year: 2019, Volume and Issue: 10

Published: May 24, 2019

The protective role of melatonin in plants against various abiotic stresses have been widely demonstrated, but poorly explored organ-specific responses and the transmission signals across organs. In this study, effects with root-irrigation method leaf-spraying on antioxidant system photosynthetic machinery maize seedlings under drought stress were investigated. results showed that led to rise reactive oxygen species (ROS), severe cell death, degradation D1 protein, which mitigated by application. application improved activities alleviated oxidative damages stress. Compared method, was more effective enhancing tolerance. Moreover, made physiological stress, varied dosage, methods plant exogenous received roots could affect leaves, perceived leaves also changes metabolisms Consequently, whole coordinated different parts a systemic acclimation Melatonin as agent has potential prospect agricultural industry.

Language: Английский

---

Integrative roles of nitric oxide and hydrogen sulfide in melatonin‐induced tolerance of pepper (Capsicum annuum L.) plants to iron deficiency and salt stress alone or in combination

Physiologia Plantarum, Journal Year: 2019, Volume and Issue: 168(2), P. 256 - 277

Published: April 13, 2019

There seems to be no report in the literature on effect of melatonin (MT) relieving detrimental effects combined application salt stress (SS) and iron deficiency (ID). Therefore, MT accumulation/synthesis endogenous nitric oxide (NO) hydrogen sulphide (H2 S) how far these molecules are involved MT-improved tolerance ID SS pepper (Capsicum annuum L) were tested. Hence, two individual trials set up. The treatments first experiment comprised: Control, (0.1 mM FeSO4 ), (100 NaCl) + SS. stresses more prominent than those by either single stress, with respect growth, oxidative antioxidant defense attributes. Single or both combination improved H2 S NO, foliar-applied µM) led a further increase NO levels. In second experiment, 0.1 scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide potassium (cPTIO) that S, hypotuarine (HT) applied along get evidence whether MT-induced cPTIO HT under showed was reversed scavenger, cPTIO, alone but inhibited scavengers. These findings suggested induced may downstream signal crosstalk between S.

Language: Английский

---

Melatonin Mediates Enhancement of Stress Tolerance in Plants

International Journal of Molecular Sciences, Journal Year: 2019, Volume and Issue: 20(5), P. 1040 - 1040

Published: Feb. 27, 2019

Melatonin is a multifunctional signaling molecule, ubiquitously distributed in different parts of plants and responsible for stimulating several physiological responses to adverse environmental conditions. In the current review, we showed that biosynthesis melatonin occurred by themselves, accumulation fluctuated sharply modulating its metabolic pathways under stress Melatonin, with precursors derivatives, acted as powerful growth regulator, bio-stimulator, antioxidant, which delayed leaf senescence, lessened photosynthesis inhibition, improved redox homeostasis antioxidant system through direct scavenging reactive oxygen species (ROS) nitrogen (RNS) abiotic biotic addition, exogenous boosted growth, photosynthetic, activities plants, confirming their tolerances against drought, unfavorable temperatures, salinity, heavy metals, acid rain, pathogens. However, future research, together recent advancements, would support emerging new approaches adopt strategies overcoming effect hazardous environments on crops may have potential implications expanding crop cultivation harsh Thus, farming communities consumers will benefit from elucidating food safety concerns.

Language: Английский

---

Melatonin increases chilling tolerance in postharvest peach fruit by alleviating oxidative damage

Scientific Reports, Journal Year: 2018, Volume and Issue: 8(1)

Published: Jan. 10, 2018

Melatonin has been reported to alleviate chilling symptoms in postharvest peach fruit during cold storage, however, the mechanism involved is largely unknown. To better understand its role tolerance, here we investigated effects of melatonin on oxidative damage subjected after harvest. Chilling injury peaches was dramatically reduced by treatment. induced hydrogen peroxide (H2O2) content at early stage storage but inhibited accumulation thereafter. Meanwhile, also up-regulated expression genes antioxidant responses peaches. In addition, compared control fruit, treated with displayed higher transcript abundance ascorbic acid (AsA) biosynthetic and consequently increased AsA content. Our results suggested that response chilling, high H2O2 level initial time may work as a signaling molecule induce protective mechanisms via up-regulating antioxidative increasing On other hand, transient increase peaches, efficiently removed because activated systems, which associated tolerance melatonin.

Language: Английский

---

Exogenous Melatonin Counteracts NaCl-Induced Damage by Regulating the Antioxidant System, Proline and Carbohydrates Metabolism in Tomato Seedlings

International Journal of Molecular Sciences, Journal Year: 2019, Volume and Issue: 20(2), P. 353 - 353

Published: Jan. 16, 2019

Melatonin, a natural agent, has multiple functions in animals as well plants. However, its possible roles plants under abiotic stress are not clear. Nowadays, soil salinity is major threat to global agriculture because high salt content causes stresses (hyperosmotic, ionic, and oxidative). Therefore, the aim of present study was explore: (1) involvement melatonin biosynthesis photosynthetic pigments regulation enzymes, such carbonic anhydrase (CA) ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco); (2) role osmoregulation by proline carbohydrate metabolism; (3) function antioxidant defense system salinity. Outcomes reveal that non-saline conditions, application (20 50 µM) improved plant growth, viz. shoot length, root fresh weight (FW), FW, dry (DW), DW leaf area physio-biochemical parameters [chlorophyll (Chl) b, (Pro) total soluble carbohydrates (TSC) content, increased activity CA Rubisco]. tomato seedlings treated with NaCl exhibited enhanced Chl degradation, electrolyte leakage (EL), malondialdehyde (MDA) reactive oxygen species (ROS; superoxide hydrogen peroxide). ROS were detected root. Interestingly, growth reduced EL, MDA levels through upregulation photosynthesis enzymes (CA, Rubisco), (superoxide dismutase, catalase, glutathione reductase ascorbate reductase) non-enzymatic antioxidants [ascorbate (ASC) (GSH)], affecting ASC—GSH cycle. Additionally, exogenous also increasing TSC, Pro Δ1-pyrroline-5-carboxylate synthetase activity. These results suggest beneficial effects on both non-stress conditions. Melatonin’s tolerance may be associated involved photosynthesis, system, metabolism carbohydrate, Also, could responsible for maintaining ratios GSH/GSSG ASC/DHA.

Language: Английский

---