Plant Glutathione Peroxidases: Antioxidant Enzymes in Plant Stress Responses and Tolerance

Bela, Krisztina; Bangash, Sajid Ali Khan; Riyazuddin,; Csiszár, Jolán

doi:10.1007/978-3-319-66682-2_5

Cited by 11 publications

(11 citation statements)

References 63 publications

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“…Several studies support that glutathione plays an essential role in Fe-deficiency tolerance and NO-mediated Fe-deficiency signalling in plants (Ramírez et al, 2008(Ramírez et al, , 2009Koen et al, 2012;Shanmugam et al, 2012Shanmugam et al, , 2015. Data are also in line with previous studies on GSH in different abiotic stresses in other plant species (Chen et al, 2010(Chen et al, , 2017Hussain et al, 2016;Akram et al, 2017;Bela et al, 2017;Cao et al, 2017).…”

Section: Effects Of Foliar Fertilisation With Gsh Alone or Supplementsupporting

confidence: 86%

Glutathione foliar fertilisation prevents lime‐induced iron chlorosis in soil grownMedicago scutellata

Gheshlaghi

Khorassani

Abadı́a

et al. 2019

J. Plant Nutr. Soil Sci.

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It has been proposed that glutathione can relieve the effects of Fe deficiency. This study tested the effects of glutathione foliar treatments to prevent Fe chlorosis, using as positive controls soil and foliar Fe fertilisation. Medicago scutellata plants were grown in soil (5.7% CaCO3) supplemented or not with 4 and 8% CaCO3. Two Fe(III)‐EDDHA soil treatments (5 and 10 mg Fe kg−1), and three foliar treatments (three applications each of 2.14 mM Fe(III)‐EDDHA, 1 mM glutathione, and the previous two combined) were applied. Measurements include leaf chlorophyll and Fe concentrations, biomass, leaf enzymatic and non‐enzymatic antioxidant systems and carboxylates. The addition of CaCO3 caused typical Fe deficiency symptoms, including changes in chlorophyll, Fe, antioxidant systems and carboxylates, which were prevented by soil and foliar Fe fertilisation. The foliar treatment with glutathione also led to higher chlorophyll, leaf extractable Fe and root Fe, as well as decreases in some antioxidant systems, whereas leaf Fe concentrations decreased. The combined foliar application of glutathione and Fe was even more efficient in preventing chlorosis. Including glutathione in foliar fertilisation programs should be considered as an option for Fe chlorosis prevention, especially when relatively large leaf total Fe concentrations occur in the so called chlorosis paradox.

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Section: Effects Of Foliar Fertilisation With Gsh Alone or Supplementsupporting

confidence: 86%

Glutathione foliar fertilisation prevents lime‐induced iron chlorosis in soil grownMedicago scutellata

Gheshlaghi

Khorassani

Abadı́a

et al. 2019

J. Plant Nutr. Soil Sci.

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“…During stressed conditions, the enzyme glutathione peroxidase (GPX) uses GSH as a reducing agent to remove excess H 2 O 2 induced by abiotic stresses, into the oxidized glutathione, GSSG. In defense against the overproduced ROS during stresses, the enzyme glutathione reductase (GR) then reduces GSSG back into GSH, further maintaining the GSH/GSSG homeostasis ( Cao et al, 2017 ; Bela et al, 2017b ). Evidently, various studies showed up-regulation of genes encoding GPX and a significant increase in GR activities in plants that were subjected to abiotic stresses such as metal toxicity, salinity, drought, and temperature extremities ( Nahar et al, 2015 ; Ding et al, 2016 ; Hussain et al, 2016 ; Li et al, 2021 ).…”

Section: Glutathionementioning

confidence: 99%

“…Generally, the uptake of HMs from the contaminated soil by the plants will result in an overproduction of ROS, causing oxidative stress and damage to the plants. In response, GSH, of the antioxidant defense system, participates in the detoxification of toxic HMs through three possible pathways which include, direct scavenging of ROS in the AsA-GSH cycle, HM chelation through the synthesis of phytochelatins (PCs), and conjugation of HMs catalyzed by glutathione S-transferase (GST; Bela et al, 2017b ; Cao et al, 2017 ).…”

Section: Roles Of Exogenous Gsh In Stressed Plantsmentioning

confidence: 99%

Mitigation of Environmental Stress-Impacts in Plants: Role of Sole and Combinatory Exogenous Application of Glutathione

et al. 2021

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Glutathione (GSH; γ-glutamyl-cysteinyl-glycine), a low-molecular-weight thiol, is the most pivotal metabolite involved in the antioxidative defense system of plants. The modulation of GSH on the plant in response to environmental stresses could be illustrated through key pathways such as reactive oxygen species (ROS) scavenging and signaling, methylglyoxal (MG) detoxification and signaling, upregulation of gene expression for antioxidant enzymes, and metal chelation and xenobiotic detoxification. However, under extreme stresses, the biosynthesis of GSH may get inhibited, causing an excess accumulation of ROS that induces oxidative damage on plants. Hence, this gives rise to the idea of exploring the use of exogenous GSH in mitigating various abiotic stresses. Extensive studies conducted borne positive results in plant growth with the integration of exogenous GSH. The same is being observed in terms of crop yield index and correlated intrinsic properties. Though, the improvement in plant growth and yield contributed by exogenous GSH is limited and subjected to the glutathione pool [GSH/GSSG; the ratio of reduced glutathione (GSH) to oxidized glutathione (GSSG)] homeostasis. Therefore, recent studies focused on the sequenced application of GSH was performed in order to complement the existing limitation. Along with various innovative approaches in combinatory use with different bioactive compounds (proline, citric acid, ascorbic acid, melatonin), biostimulants (putrescine, Moringa leaf extract, selenium, humic acid), and microorganisms (cyanobacteria) have resulted in significant improvements when compared to the individual application of GSH. In this review, we reinforced our understanding of biosynthesis, metabolism and consolidated different roles of exogenous GSH in response to environmental stresses. Strategy was also taken by focusing on the recent progress of research in this niche area by covering on its individualized and combinatory applications of GSH prominently in response to the abiotic stresses. In short, the review provides a holistic overview of GSH and may shed light on future studies and its uses.

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“…The results could be attributed to the fact that Cu/Zn-SOD mainly functions as a ROS scavenger in the cytoplast and only scavenges ROS a little in chloroplasts [44]. GPX catalyzes the reduction of H 2 O 2 , organic hydroperoxide, and lipid peroxides using glutathione (GSH), thioredoxin (TRX) and/or other reducing equivalents and is generally considered to be the main line of enzymatic defense against oxidative membrane damage [45][46][47]. GPX has been proven to function as both a redox transducer and an ROS scavenger in abscisic acid and drought stress response in Arabidopsis [48].…”

Section: Discussionmentioning

confidence: 99%

The iTRAQ-based chloroplast proteomic analysis of Triticum aestivum L. leaves subjected to drought stress and 5-aminolevulinic acid alleviation reveals several proteins involved in the protection of photosynthesis

Wang

Liu

et al. 2020

BMC Plant Biol

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Backgrounds: The perturbance of chloroplast proteins is a major cause of photosynthesis inhibition under drought stress. The exogenous application of 5-aminolevulinic acid (ALA) mitigates the damage caused by drought stress, protecting plant growth and development, but the regulatory mechanism behind this process remains obscure.Results: Wheat seedlings were drought treated, and the iTRAQ-based proteomic approach was employed to assess the difference in chloroplast protein content caused by exogenous ALA. A total of 9499 peptides, which could be classified into 2442 protein groups, were identified with ≤0.01 FDR. Moreover, the contents of 87 chloroplast proteins was changed by drought stress alone compared to that of the drought-free control, while the contents of 469 was changed by exogenous ALA application under drought stress compared to that of drought stress alone. The Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis results suggested that the ALA pretreatment adjusted some biological pathways, such as metabolic pathways and pathways involved in photosynthesis and ribosomes, to enhance the drought resistance of chloroplasts. Furthermore, the drought-promoted H 2 O 2 accumulation and O 2 − production in chloroplasts were alleviated by the exogenous pretreatment of ALA, while peroxidase (POD) and glutathione peroxidase (GPX) activities were upregulated, which agreed with the chloroplast proteomic data. We suggested that ALA promoted reactive oxygen species (ROS) scavenging in chloroplasts by regulating enzymatic processes. Conclusions:Our results from chloroplast proteomics extend the understanding of the mechanisms employed by exogenous ALA to defend against drought stress in wheat.

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Plant Glutathione Peroxidases: Antioxidant Enzymes in Plant Stress Responses and Tolerance

Cited by 11 publications

References 63 publications

Glutathione foliar fertilisation prevents lime‐induced iron chlorosis in soil grownMedicago scutellata

Glutathione foliar fertilisation prevents lime‐induced iron chlorosis in soil grownMedicago scutellata

Mitigation of Environmental Stress-Impacts in Plants: Role of Sole and Combinatory Exogenous Application of Glutathione

The iTRAQ-based chloroplast proteomic analysis of Triticum aestivum L. leaves subjected to drought stress and 5-aminolevulinic acid alleviation reveals several proteins involved in the protection of photosynthesis

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