Melatonin enhanced the heavy metal-stress tolerance of pepper by mitigating the oxidative damage and reducing the heavy metal accumulation

Altaf, Muhammad Ahsan; Hao, Yuanyuan; Shu, Huangying; Mumtaz, Muhammad Ali; Cheng, Shanhan; Alyemeni, Mohammed Nasser; Ahmad, Parvaiz; Wang, Zhiwei

doi:10.1016/j.jhazmat.2023.131468

Cited by 90 publications

(33 citation statements)

References 52 publications

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“…Individual applications of MLT or H 2 S alleviated the Cd-induced decrease in plant biomass and they acted synergistically. The results are similar to the findings of Altaf et al 43 and Kaya et al, 18 where the authors observed an increase in biomass in response to the individual applications of MLT or H 2 S. Similarly, the application of MLT and H 2 S is reported to enhance the growth of plants grown under Cd stress condition. 44 , 45 The improvement in the plant biomass in response to the application of H 2 S and MLT is strongly linked with the antioxidative ability of MLT and the unique properties of H 2 S.…”

Section: Discussionsupporting

confidence: 90%

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

Zulfiqar,

Moosa,

Ali

et al. 2024

Plant Signaling & Behavior

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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 to mitigate abiotic stresses induced oxidative stress in plants. Similarly, signaling molecules such as hydrogen sulfide (H 2 S) have emerged as potential options for resolving HMs related problems in plants. The mechanisms underlying the combined application of MLT and H 2 S are not yet explored. Therefore, we evaluated the ability of individual and combined applications of MLT (100 μM) and H 2 S in the form of sodium hydrosulfide (NaHS), a donor of H 2 S, (1.5 mM) to alleviate cadmium (Cd) stress (50 mg L −1 ) in stock ( Matthiola incana L.) plants by measuring various morpho-physiological and biochemical characteristics. The results depicted that Cd-stress inhibited growth, photosynthesis and induced Cd-associated oxidative stress as depicted by excessive ROS accumulation. Combined application of MLT and H 2 S efficiently recovered all these attributes. Furthermore, Cd stress-induced oxidative stress markers including electrolyte leakage, malondialdehyde, and hydrogen peroxide are partially reversed in Cd-stressed plants by MLT and H 2 S application. This might be attributed to MLT or H 2 S induced antioxidant plant defense activities, which effectively reduce the severity of oxidative stress indicators. Overall, MLT and H 2 S supplementation, favorably regulated Cd tolerance in stock; yet, the combined use had a greater effect on Cd tolerance than the independent application.

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Section: Discussionsupporting

confidence: 90%

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

Zulfiqar,

Moosa,

Ali

et al. 2024

Plant Signaling & Behavior

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“…To evaluate its role in the defense mechanism against PH‐1, we analyzed different antioxidant enzyme activities and the expression of defense‐responsive genes. The enzyme activity assay showed that melatonin significantly improved antioxidant enzymes (SOD), whereas POD and APX were significantly decreased in maize in a dose‐dependent manner which agrees with the work of Altaf et al (2023) (Figure 3). The relative expression of defense genes, including PR1, LOX1 , and OXR , was up‐regulated and HYD, GST2 , and CCD1 were down‐regulated, mainly through the SA signaling pathway (Figure 4).…”

Section: Discussionsupporting

confidence: 90%

Exogenous Melatonin Regulates Plant‐Disease Interaction by Inducing Maize Resistance and Decreasing the Pathogenicity of Fusarium graminearum

Kong,

Ali,

Jing

et al. 2023

Physiologia Plantarum

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Plants cannot avoid environmental challenges and are constantly threatened by diverse biotic and abiotic stresses. However, plants have developed a unique immune system to defend themselves against the invasion of various pathogens. Melatonin, N‐acetyl‐5‐methoxytryptamine has positive physiological effects in plants that are involved in disease resistance. The processes underlying melatonin‐induced pathogen resistance in plants are still unknown. The current study explores how melatonin regulates the plant‐disease interaction in maize. The results showed that 400 μM melatonin strongly reduced the disease lesion on maize stalks by 1.5 cm and corn by 4.0 cm caused by Fusarium graminearum PH‐1. Furthermore, after treatment with melatonin, the plant defense enzymes like SOD significantly increased, while POD and APX significantly decreased compared to the control. In addition, melatonin can also improve maize's innate immunity, which is mediated by melatonin treatments through the salicylic acid signaling pathway, and up‐regulate the defense‐associated expression of PR1, LOX1, OXR, serPIN, and WIPI genes in maize. Melatonin not only inhibits the disease in the maize stalks and corn, but also down‐regulates the deoxynivalenol (DON) production‐related expression of genes Tri1, Tri4, Tri5, and Tri6 in maize. Overall, this study sheds new light on the mechanisms by which melatonin regulates antioxidant enzymes and defense‐related genes involved in plant immunity to effectively suppress plant diseases.

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“…Polyphenolic compounds in plants act as chelators of metal ions to decrease the presence of free radicals and minimize oxidative stress in plants treated with high metal concentrations (Mousavi et al, 2021;Raza et al, 2023). Phenolic compounds terminate free radical chains and redox active metal ions that are capable of catalyzing lipid peroxidation (Altaf et al, 2023). Application of SNP further increased the accumulation of phenols and flavonoids in plants exposed to Ni toxicity (Figure 4); thus, implying a certain degree of defense against Ni stress.…”

Section: Snp Increased the Accumulation Of Phenolic Compounds And Org...mentioning

confidence: 99%

Exogenously applied sodium nitroprusside alleviates nickel toxicity in maize by regulating antioxidant activities and defense‐related gene expression

Abbas,

Basit,

Tanwir

et al. 2023

Physiologia Plantarum

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Nickel (Ni) stress adversely affects plant growth and biomass accumulation, posturing severe menace to crop production and food security. The current study aimed to determine the putative role of sodium nitroprusside (SNP) in mitigating Ni‐induced phytotoxicity and identify the underlying defense mechanisms in maize, which are poorly understood. Our findings showed that SNP significantly augmented plant growth, biomass, and photosynthesis‐related attributes (Fv/Fm, Fm, qP ETR, and ΦPSII) through diminishing Ni uptake and translocation in root and shoot tissues of maize under Ni stress conditions. In parallel, exogenous SNP substantially relieved maize seedlings from Ni‐induced stress by enhancing enzymatic (SOD, CAT, and GPX) and non‐enzymatic (phenol and flavonoids) antioxidant defenses and reducing oxidative stress indicators (MDA and H2O2). The results revealed that SNP treatment increased the content of organic osmolyte glycine betaine and the activity of GST, concomitantly with ATP and ionic exchange capacity (including Ca2+‐ATPase and Mg2+‐ATPase), advocating its sufficiency to promote plant growth and avert Ni‐induced stress in maize plants. The only exception was the production of organic acids (citric, oxalic, malic, and formic acids), which was reduced as SNP treatment relieved maize seedlings from Ni‐induced oxidative damage. The application of SNP also displayed higher expression of defense‐ and detoxifying‐related genes than in control treatments. Together, our data highlighted the mechanism involved in the amelioration of Ni toxicity by SNP; thus, suggesting a potential role of SNP in mitigating the adverse effects of Ni‐contaminated soils to boost growth and yield of crop plants, that is, maize.

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Melatonin enhanced the heavy metal-stress tolerance of pepper by mitigating the oxidative damage and reducing the heavy metal accumulation

Cited by 90 publications

References 52 publications

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

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

Exogenous Melatonin Regulates Plant‐Disease Interaction by Inducing Maize Resistance and Decreasing the Pathogenicity of Fusarium graminearum

Exogenously applied sodium nitroprusside alleviates nickel toxicity in maize by regulating antioxidant activities and defense‐related gene expression

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