Heavy Metal Induced Oxidative Stress Mitigation and ROS Scavenging in Plants

Plants, Год журнала: 2023, Номер 12(16), С. 3003 - 3003

Опубликована: Авг. 20, 2023

Although trace elements are essential for life, environmental contamination due to metal accumulation and overuse in various sectors, such as healthcare, agriculture, industry, cosmetics, poses significant health concerns. Exposure of plants heavy metals leads the overproduction reactive oxygen species (ROS) their ability change mitochondrial membrane permeability restrict action ROS clearance enzymes cellular antioxidant system. The interaction with membranes, heavy-metal-induced interactions directly or indirectly different macromolecules, signaling pathways pollutants oxidative stress exposed organisms. metal–ROS–cell axis affects pathological processes ATP depletion, excess production, respiratory chain damage, decoupling phosphorylation, death. This review focuses on discussing toxic effects plants, particular emphasis stress, its consequences, mitigation strategies.

Язык: Английский

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Melatonin as a key regulator in seed germination under abiotic stress

Journal of Pineal Research, Год журнала: 2024, Номер 76(1)

Опубликована: Янв. 1, 2024

Abstract Seed germination (SG) is the first stage in a plant's life and has an immense importance sustaining crop production. Abiotic stresses reduce SG by increasing deterioration of seed quality, reducing potential, vigor. Thus, to achieve sustainable level yield, it important improve under abiotic stress conditions. Melatonin (MEL) biomolecule that interplays developmental processes regulates many adaptive responses plants, especially stresses. this review specifically summarizes discusses mechanistic basis MEL‐mediated MEL regulating some stress‐specific common responses. For instance, induced specific include regulation ionic homeostasis, hydrolysis storage proteins salinity stress, C‐repeat binding factors signaling cold starch metabolism high temperature heavy metal activation aquaporins accumulation osmolytes drought stress. On other hand, mediated gibberellins biosynthesis abscisic acid catabolism, redox Ca 2+ are amongst Nonetheless such as endogenous contents, plant species, growth conditions also influence above‐mentioned In conclusion, interacting with different physiological mechanisms.

Язык: Английский

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Effects of exogenous spraying of melatonin on the growth of Platycrater arguta under drought stress

Frontiers in Plant Science, Год журнала: 2025, Номер 15

Опубликована: Янв. 17, 2025

Platycrater arguta is a rare and endangered deciduous shrub originating from the Tertiary Period. Understanding its drought tolerance crucial for conservation efforts enhancing resilience to environmental stress. This study aimed assess effects of varying levels stress on phenotype physiological-biochemical characteristics P. arguta. The subjected different using 10%, 20%, 30% polyethylene glycol-6000 (PEG-6000) over 10-day period. Additionally, exogenous melatonin application at various concentrations (including 100 µM) were examined determine potential in alleviating drought-induced damage. Key parameters measured included leaf relative water content, net photosynthetic rate (Pn), antioxidant enzyme activity, soluble sugar content. Drought significantly inhibited growth As PEG-6000 concentration increased, content decreased, while wilting severity, membrane damage, increased. A caused irreversible leading plant death. Exogenous µM alleviated this damage by increasing efficiency, boosting accumulating osmotic regulators, reducing desiccation. demonstrated that sensitive severe conditions, with causing However, improved plant's upregulating expression ABI1 downregulating genes such as AUX1A-2, IAA2-2, HP2-1. finding highlights protective agent against stress, providing valuable insights enhancement arguta's challenges.

Язык: Английский

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Photosynthetic machinery and antioxidant enzymes system regulation confers cadmium stress tolerance to tomato seedlings pretreated with melatonin

Scientia Horticulturae, Год журнала: 2023, Номер 323, С. 112550 - 112550

Опубликована: Окт. 3, 2023

Язык: Английский

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Synergistic interplay between melatonin and hydrogen sulfide enhances cadmium-induced oxidative stress resistance in stock ( Matthiola incana L.)

Plant Signaling & Behavior, Год журнала: 2024, Номер 19(1)

Опубликована: Апрель 2, 2024

Ornamental crops particularly cut flowers are considered sensitive to heavy metals (HMs) induced oxidative stress condition. Melatonin (MLT) is a versatile phytohormone with the ability mitigate abiotic stresses in plants. Similarly, signaling molecules such as hydrogen sulfide (H2S) have emerged potential options for resolving HMs related problems The mechanisms underlying combined application of MLT and H2S not yet explored. Therefore, we evaluated individual applications (100 μM) form sodium hydrosulfide (NaHS), donor H2S, (1.5 mM) alleviate cadmium (Cd) (50 mg L−1) stock (Matthiola incana L.) plants by measuring various morpho-physiological biochemical characteristics. results depicted that Cd-stress inhibited growth, photosynthesis Cd-associated excessive ROS accumulation. Combined efficiently recovered all these attributes. Furthermore, Cd stress-induced markers including electrolyte leakage, malondialdehyde, peroxide partially reversed Cd-stressed application. This might be attributed or antioxidant plant defense activities, which effectively reduce severity indicators. Overall, supplementation, favorably regulated tolerance stock; yet, use had greater effect on than independent

Язык: Английский

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Exploring the synergistic effects of indole acetic acid (IAA) and compost in the phytostabilization of nickel (Ni) in cauliflower rhizosphere

BMC Plant Biology, Год журнала: 2024, Номер 24(1)

Опубликована: Апрель 11, 2024

Abstract Heavy metals (HMs) contamination, owing to their potential links various chronic diseases, poses a global threat agriculture, environment, and human health. Nickel (Ni) is an essential element however, at higher concentration, it highly phytotoxic, affects major plant functions. Beneficial roles of growth regulators (PGRs) organic amendments in mitigating the adverse impacts HM on has gained attention scientific community worldwide. Here, we performed greenhouse study investigate effect indole-3-acetic acid (IAA @ 10 − 5 M) compost (1% w/w) individually combination sustaining cauliflower yield under Ni stress. In our results, combined application proved significantly better than individual applications alleviating effects as increased attributes such height (49%), root length (76%), curd diameter (68 134%), leaf area (75%), transpiration rate (36%), stomatal conductance (104%), water use efficiency (143%), flavonoid phenolic contents (212 133%), soluble sugars protein (202 199%), SPAD value (78%), chlorophyll ‘a b’ (219 208%), carotenoid (335%), NPK uptake (191, 79 92%) compared control. Co-application IAA reduced Ni-induced electrolyte leakage (64%) improved antioxidant activities, including APX (55%), CAT (30%), SOD (43%), POD while reducing MDA H 2 O (77 52%) The also roots, shoots, by 51, 78 72% respectively along with relative production index (78%) Hence, synergistic can mitigate induced immobilizing soil.

Язык: Английский

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Trehalose and melatonin interactions alleviate cadmium-incited oxidative stress via activating defense related genes and improve ornamental pepper growth

Plant Growth Regulation, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 3, 2024

Язык: Английский

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Exogenous melatonin and grafting improved the growth and physiological characteristics of Citrullus lanatus seedlings under cadmium stress

Environmental Science and Pollution Research, Год журнала: 2025, Номер unknown

Опубликована: Янв. 18, 2025

Язык: Английский

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Melatonin modified root architecture system and accelerated mineral nutrient concentration of different pepper species under vanadium toxicity

Horticultural Plant Journal, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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Melatonin-Mediated Regulation of Antioxidant Defense Enhances the Resistance of Tea Plants (Camellia sinensis L.) to Lead-Induced Stress

Plants, Год журнала: 2025, Номер 14(10), С. 1417 - 1417

Опубликована: Май 9, 2025

Lead (Pb) is a toxic heavy metal that severely impairs plant growth and crop quality. Melatonin, widely present indoleamine compound, enhances stress tolerance, yet its role in tea resistance to lead remains unclear. This study examined two genotypes with distinct anthocyanin levels, Longjing43 (LJ43) Zijuan (ZJ), comparing their phenotype, antioxidant capacity, secondary metabolite synthesis, transport gene expression under stress. Excessive Pb exposure caused severe oxidative stress, reducing PSII efficiency, increasing ROS accumulation, intensifying lipid peroxidation. ZJ, higher concentration, exhibited stronger than LJ43. Under melatonin promoted phenylalanine accumulation facilitating conversion into anthocyanins catechins via key regulation (CsC4H, CsLAR, CsANS). Moreover, exogenous significantly reduced concentrations roots, stems, leaves, more pronounced effect ZJ (reductions of 20.46%, 53.30%, 38.17%, respectively), which might be associated the downregulation genes like CsZIP1 (notably showing 29-fold decrease). While these results suggest enhance tolerance by modulating flavonoid metabolism restricting uptake, specific roles this process fully elucidated. Further studies are necessary clarify primary bioactive compounds mechanisms involved melatonin-mediated mitigation.

Язык: Английский

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