Hydrogen peroxide-induced stress acclimation in plants

Qureshi, Muhammad Kamran; Gawroński, Piotr; Munir, Sana; Jindal, Sunita; Kerchev, Pavel

doi:10.1007/s00018-022-04156-x

Cited by 24 publications

(17 citation statements)

References 184 publications

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“…Therefore, it is essential to understand the oxidative damage ( Figure 4 and Figure S1 ) and ROS accumulation ( Figure 5 ) in plants under MP exposure in order to recognize MPs toxicity. The ROS contain singlet oxygen ( 1 O 2 ), •O 2 − , and H 2 O 2 [ 37 , 38 ], where •O 2 − is an anion radical generated during biological oxidation and electron transfer and plant cells generate H 2 O 2 through processes such as disproportionation reactions of •O 2 − catalyzed by SOD enzymes. More specifically, all pristine MPs induced an increase in •O 2 − and H 2 O 2 content in the roots compared to the control group ( Figure 5 a,b).…”

Section: Resultsmentioning

confidence: 99%

Physiological Toxicity and Antioxidant Mechanism of Photoaging Microplastics on Pisum sativum L. Seedlings

Kang

Liu

Wang

et al. 2023

Toxics

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Recent studies have confirmed that changes in the physical properties of microplastics (MPs) trigger toxicological effects and ecological risks. To explore the toxicity of different types of MPs on plants, and the influence of MP photoaging, this study investigated the toxicity mechanisms of pristine, 7 and 14 d photoaged polystyrene (PS), polyamide (PA), polyethylene (PE), and polyethylene terephthalate (PET) MPs on seed germination, root growth, nutrient fraction, oxidative stress, and antioxidant systems of Pisum sativum L. (pea) seedlings. The results showed that pristine PS and 14 d photoaged PET inhibited seed germination. Compared to the pristine MPs, photoaged MPs had negative effects on root elongation. Moreover, photoaged PA and PE impeded the nutrient transport of soluble sugars from roots to stems. Notably, the production of superoxide anion radicals (•O2−) and hydroxyl radicals (•OH) through the photoaging of MPs exacerbated oxidative stress and reactive oxygen species formation in roots. Antioxidant enzyme data revealed that the activities of superoxide dismutase and catalase were significantly activated in photoaged PS and PE, respectively, in order to scavenge •O2− and hydrogen peroxide (H2O2) accumulation and alleviate lipid peroxidation levels in cells. These findings provide a new research perspective on the phytotoxicity and ecological risk of photoaged MPs.

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Section: Resultsmentioning

confidence: 99%

Physiological Toxicity and Antioxidant Mechanism of Photoaging Microplastics on Pisum sativum L. Seedlings

Kang

Liu

Wang

et al. 2023

Toxics

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“…The basic cause of CAT1 induction remains unknown at this point but a plausible trigger could be hydrogen peroxide (H 2 O 2 ), the substrate of CAT1, possibly generated in leaves upon extract treatment. Forest trees produce an array of secondary compounds to defend themselves against arthropods and pathogens [28], that can not only be detrimental to microbial pathogens as shown above for Pst DC3000 (see Table 1 ) but also induce the production of secondary messengers like H 2 O 2 and other reactive oxygen species (ROS) involved in acclimation to abiotic stress conditions [58,59]. For instance, terpenoids present in large amounts in conifer (e.g., cedar) and other plant extracts show promise as potential biopesticides in agriculture for pest and pathogen control [60].…”

Section: Resultsmentioning

confidence: 99%

Forest tree extracts induce resistance toPseudomonas syringaepv.tomatoin Arabidopsis

Soltaniband,

Barrada,

Delisle-Houde

et al. 2023

Preprint

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BackgroundThe widespread use of conventional pesticides to control plant fungal and bacterial pathogens poses significant risks to human health and the environment, and there is an urgent need for safer and more sustainable alternatives in agricultural management. Studies have shown that plant extracts can be effective in controlling plant diseases either by directly targeting the pathogens or by reinforcing the host plant’s own defenses. Here, we examined the potential of ethanolic extracts from forest tree species eastern hemlock, English oak, eastern red cedar and red pine for their antibacterial activity againstPseudomonas syringaepv.tomato(Pst) strain DC3000 and the ability of these forestry by-products to trigger effective defense responses in the model plantArabidopsis thaliana.ResultsThe four tree extracts exhibited direct toxic effects againstPstDC3000, as notably observed for the English oak extract inhibiting bacterial growth and showing bactericidal activity at relatively low concentrations. Using an Arabidopsis line expressing reporter protein ß-glucuronidase under the control of a salicylic acid-inducible pathogenesis-related protein gene promoter, the extracts were shown also to induce defense-related genes expression in leaf tissue. RT-qPCR assays with DNA primers for different gene markers further confirmed this conclusion and highlighted gene-inducing effects for the tree extracts triggering, at different rates, the expression of salicylic acid- and oxidative stress-responsive genes. The extracts direct antibacterial effects, combined with their defense gene-inducing effectsin planta, resulted in a strong host plant-protecting effect againstPstDC3000 associated with bacterial growth rates reduced by ∼75 to 98% seven days post-infection, depending on the extract.ConclusionsThese findings show the effectiveness of tree extracts as eventual plant protectants against the plant bacterial pathogenPst. In a broader perspective, they suggest the potential of these forestry by-products as a source of bioactive compounds useful in plant protection and as a sustainable, eco-friendly alternative to conventional synthetic pesticides for the management of economically important plant pathogens.

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“…Despite the genome‐wide inhibition of translation, the mRNAs coding for proteins that are necessary for survival under the stress situation are selectively translated [67,68]. Plants experiencing adverse environmental conditions accumulate reactive oxygen species (ROS), including superoxide radicals, hydrogen peroxide, hydroxyl radicals, or/and singlet oxygen [53,69]. Reactive oxygen species have a dual activity, as they induce oxidative damage to cellular components and biomolecules and participate in redox regulation of metabolism and signaling pathways by modifying amino acid residues in specific proteins [70,71].…”

Section: Discussionmentioning

confidence: 99%

“…Considering that H 2 O 2 is a naturally occurring endogenous or exogenous reactive oxygen species (ROS) implicated in oxidative stress in many organisms, including plants [53,54], and that our data indicate that it promotes disulfide bond formation in SerRS, we used it as an oxidant to investigate its impact on the aminoacylation activity of SerRS variants. First, we incubated enzymes purified without a reducing reagent with 10 mM H 2 O 2 .…”

Section: Aminoacylation Activity Of Serrs Variantsmentioning

confidence: 99%

Evolutionarily conserved cysteines in plant cytosolic seryl‐tRNA synthetase are important for its resistance to oxidation

Evic,

Soic,

Mocibob

et al. 2023

FEBS Letters

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We have previously identified a unique disulfide bond in the crystal structure of Arabidopsis cytosolic seryl‐tRNA synthetase involving cysteines evolutionarily conserved in all green plants. Here, we discovered that both cysteines are important for protein stability, but with opposite effects, and that their microenvironment may promote disulfide bond formation in oxidizing conditions. The crystal structure of the C244S mutant exhibited higher rigidity and an extensive network of noncovalent interactions correlating with its higher thermal stability. The activity of the wild‐type showed resistance to oxidation with H2O2, while the activities of cysteine‐to‐serine mutants were impaired, indicating that the disulfide link may enable the protein to function under oxidative stress conditions which can be beneficial for an efficient plant stress response.

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Hydrogen peroxide-induced stress acclimation in plants

Cited by 24 publications

References 184 publications

Physiological Toxicity and Antioxidant Mechanism of Photoaging Microplastics on Pisum sativum L. Seedlings

Physiological Toxicity and Antioxidant Mechanism of Photoaging Microplastics on Pisum sativum L. Seedlings

Forest tree extracts induce resistance toPseudomonas syringaepv.tomatoin Arabidopsis

Evolutionarily conserved cysteines in plant cytosolic seryl‐tRNA synthetase are important for its resistance to oxidation

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