Response of Phenylpropanoid Pathway and the Role of Polyphenols in Plants under Abiotic Stress

Molecules, Journal Year: 2019, Volume and Issue: 24(13), P. 2452 - 2452

Published: July 4, 2019

Phenolic compounds are an important class of plant secondary metabolites which play crucial physiological roles throughout the life cycle. Phenolics produced under optimal and suboptimal conditions in plants key developmental processes like cell division, hormonal regulation, photosynthetic activity, nutrient mineralization, reproduction. Plants exhibit increased synthesis polyphenols such as phenolic acids flavonoids abiotic stress conditions, help to cope with environmental constraints. Phenylpropanoid biosynthetic pathway is activated (drought, heavy metal, salinity, high/low temperature, ultraviolet radiations) resulting accumulation various which, among other roles, have potential scavenge harmful reactive oxygen species. Deepening research focuses on responses great interest for scientific community. In present article, we discuss biochemical molecular mechanisms related activation phenylpropanoid metabolism describe phenolic-mediated tolerance plants. An attempt has been made provide updated brand-new information about response phenolics a challenging environment.

Language: Английский

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Regulation of Ascorbate-Glutathione Pathway in Mitigating Oxidative Damage in Plants under Abiotic Stress

Antioxidants, Journal Year: 2019, Volume and Issue: 8(9), P. 384 - 384

Published: Sept. 9, 2019

Reactive oxygen species (ROS) generation is a usual phenomenon in plant both under normal and stressed condition. However, unfavorable or adverse conditions, ROS production exceeds the capacity of antioxidant defense system. Both non-enzymatic enzymatic components system either detoxify scavenge mitigate their deleterious effects. The Ascorbate-Glutathione (AsA-GSH) pathway, also known as Asada-Halliwell pathway comprises AsA, GSH, four enzymes viz. ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate glutathione play vital role detoxifying ROS. Apart from detoxification, they interact with other systems plants protect various abiotic stress-induced damages. Several studies revealed that upregulation overexpression AsA-GSH enhancement AsA GSH levels conferred better tolerance to stresses by reducing In this review, we summarize recent progress research on terms oxidative stress plants. We focus mechanisms well molecular interactions.

Language: Английский

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Abiotic Stress and Reactive Oxygen Species: Generation, Signaling, and Defense Mechanisms

Antioxidants, Journal Year: 2021, Volume and Issue: 10(2), P. 277 - 277

Published: Feb. 11, 2021

Climate change is an invisible, silent killer with calamitous effects on living organisms. As the sessile organism, plants experience a diverse array of abiotic stresses during ontogenesis. The relentless climatic changes amplify intensity and duration stresses, making dwindle to survive. Plants convert 1-2% consumed oxygen into reactive species (ROS), in particular, singlet (1O2), superoxide radical (O2•-), hydrogen peroxide (H2O2), hydroxyl (•OH), etc. as byproduct aerobic metabolism different cell organelles such chloroplast, mitochondria, regulatory network comprising enzymatic non-enzymatic antioxidant systems tends keep magnitude ROS within plant cells non-damaging level. However, under stress conditions, production rate increases exponentially, exceeding potential scavengers instigating oxidative burst, which affects biomolecules disturbs cellular redox homeostasis. are similar double-edged sword; and, when present below threshold level, mediate signaling pathways that actuate growth, development, acclimatization against stresses. displays both detrimental beneficial effects. exact mediated alleviation yet be fully elucidated. Therefore, review deposits information about status known sites production, mechanisms/pathways, effects, management stress. In addition, role played by advancement modern techniques molecular priming, biology, phenomics, crop modeling preventing stress, well diverting has been canvassed.

Language: Английский

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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

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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

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Mechanisms Regulating the Dynamics of Photosynthesis Under Abiotic Stresses

Frontiers in Plant Science, Journal Year: 2021, Volume and Issue: 11

Published: Jan. 28, 2021

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

Language: Английский

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Effect of Salt Stress on Growth, Physiological Parameters, and Ionic Concentration of Water Dropwort (Oenanthe javanica) Cultivars

Frontiers in Plant Science, Journal Year: 2021, Volume and Issue: 12

Published: June 21, 2021

Salt stress is an important environmental limiting factor. Water dropwort ( Oenanthe javanica ) vegetable in East Asia; however, its phenotypic and physiological response poorly explored. For this purpose, 48 cultivars of water were grown hydroponically treated with 0, 50, 100, 200 mm NaCl for 14 days. Than their responses evaluated, afterward, studies carried out selected sensitive tolerant cultivars. In the present study, potential (V11E0022) (V11E0135) by screening based on phenotype under four different levels salt concentrations (0, mm). The results depicted that plant height, number branches leaves less effected V11E0022, most severe reduction was observed V11E0135 comparison others. changes biomass, ion contents, accumulation reactive oxygen species, activities antioxidant enzymes non-enzymatic antioxidants determined roots cultivar showed content demonstrated low Na + uptake, malondialdehyde, hydrogen peroxide (H 2 O both roots. Moreover, high ascorbate peroxidase (APX), superoxide dismutase, peroxidase, catalase (CAT), reduced glutathione (GSH), proline soluble sugars compared to (V11E0135). These suggest tolerance V11E0022 against detrimental effects a good defense system. observations also capacity stress. findings study leaves, GSH, proline, sugars, APX, CAT could serve as efficient markers understanding mechanisms conditions

Language: Английский

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Phytohormone signaling and crosstalk in regulating drought stress response in plants

Plant Cell Reports, Journal Year: 2021, Volume and Issue: 40(8), P. 1305 - 1329

Published: March 22, 2021

Language: Английский

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Hormesis in plants: Physiological and biochemical responses

Ecotoxicology and Environmental Safety, Journal Year: 2020, Volume and Issue: 207, P. 111225 - 111225

Published: Sept. 8, 2020

Hormesis is a favorable response to low level exposures substance or adverse conditions. This phenomenon has become target achieve greater crop productivity. review aimed address the physiological mechanisms for induction of hormesis in plants. Some herbicides present hormetic dose response. Among them, those with active ingredients glyphosate, 2,4-D and paraquat. The application glyphosate as promoter therefore showing promess . Glyphosate prominent role shikimic acid pathway, decreasing lignin synthesis resulting improved growth productivity several crops. Further studies are still needed estimate optimal doses other crops agricultural interest. Biostimulants also important, since they promote effects on secondary metabolic pathways production reactive oxygen species (ROS). When ROS produced, hydrogen peroxide act signaling molecule that cell walls malleability allowing inward water transport causing expansion. Plants'ability overcome abiotic stress conditions desirable avoid losses economic losses. compiles information how plants can be used new levels.

Language: Английский

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Hormesis in plants under Cd exposure: From toxic to beneficial element?

Journal of Hazardous Materials, Journal Year: 2019, Volume and Issue: 384, P. 121434 - 121434

Published: Oct. 13, 2019

Language: Английский

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