Salicylic acid-induced superoxide generation catalyzed by plant peroxidase in hydrogen peroxide-independent manner

Kimura, Makoto; Kawano, Tomonori

doi:10.1080/15592324.2014.1000145

Cited by 14 publications

(15 citation statements)

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“…7). These data are reminiscent of what was observed upon salicylic acid treatment (Kimura and Kawano, 2015) for which apoplastic peroxidases are likely to be involved in the earlier phase of oxidative burst, and NADPH oxidases are likely to be involved in the late phase of the oxidative burst, the key signalling event connecting the two phases of oxidative burst being calcium channel activation. Although methanol alone was not shown to be active on ROS generation in tomato, only allowing the increase and prolongation of the flg22-induced oxidative burst (Hann et al, 2014), our data reinforced the hypothesis of a role for methanol in inducing a signalling pathway.…”

Section: Discussionsupporting

confidence: 65%

“…The mechanism at the origin of this early ROS generation is still to be determined. Several cell wall-located enzymes such as polyamine oxidases (Pottosin and Shabala, 2014) or peroxidases (Kimura and Kawano, 2015) that could be responsible for extracellular 1 O 2 generation (Kawano et al, 1998;Kanofsky, 2000;Guo et al, 2009) are known to be responsible for cell wall ROS production susceptible to control of Ca 2+ transport across the PM.…”

Section: Discussionmentioning

confidence: 99%

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Methanol induces cytosolic calcium variations, membrane depolarization and ethylene production in arabidopsis and tobacco

et al. 2018

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Section: Discussionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Methanol induces cytosolic calcium variations, membrane depolarization and ethylene production in arabidopsis and tobacco

et al. 2018

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“…The upregulation of JA/ET-related genes and the marked induction of PDF1.2 (approximately 56-fold compared to the WT and At2OGO-KO/Hv2OGO plants) indicate that these genes may also play a role in the enhanced resistance displayed by At2OGO-KO plants and that this, in turn, may be responsible for slowing down Fg infection and colonization. The RBOHD gene was highly expressed from 6-12 hpi, implicating it in regulating ROS production as a protective mechanism during attempted pathogen invasion [55][56][57] . Based on our qPCR analysis, JA signaling was activated in parallel with the SA signaling to attenuate damage caused by fungal infection, which was similar to responses observed in previous studies 58 .…”

Section: Discussionmentioning

confidence: 99%

Validation of barley 2OGO gene as a functional orthologue of Arabidopsis DMR6 gene in Fusarium head blight susceptibility

Low

Lawton

2020

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Fusarium head blight (fHB) caused by Fusarium graminearum (Fg) is a devastating disease of crops, especially wheat and barley, resulting in significant yield loss and reduced grain quality. Fg infection leads to the production of mycotoxins, whose consumption is toxic to humans and livestock. the Arabidopsis DMR6 gene encodes a putative 2-oxoglutarate Fe(II)-dependent oxygenase (2OGO) and has been identified as a susceptibility factor to downy mildew. We generated site-specific mutations in Arabidopsis At2OGO by CRISPR/Cas9 gene editing. The resulting At2OGO knockout (KO) mutants display enhanced resistance to Fg in a detached inflorescence infection assay. Expression profiling of defense genes revealed that impairment of At2OGO function resulted in the upregulation of defense genes that are regulated by salicylic acid (SA), jasmonic acid (JA) and ethylene (et) pathways. complementation of the At2OGO-KO lines with a barley (cv. Conlon) orthologue, Hv2OGO, restored susceptibility to Fg. this result indicates that the Hv2OGO gene is functionally equivalent to its Arabidopsis counterpart and, hence, may have a similar role in conditioning susceptibility to fHB in barley. these results provide a molecular basis for proposing 2OGO as a plant immunity suppressor in Arabidopsis and potentially in barley plants and establish a rationale and strategy for enhancing fHB resistance in barley. Fusarium head blight (FHB) or scab is primarily caused by Fusarium graminearum (Fg) (teleomorph Gibberella zeae) and is a devastating disease of cereal crops, particularly wheat, barley and maize. FHB disease has been identified as a major limiting factor in cereal crop production throughout the world 1. Fg is an important hemibiotrophic fungal pathogen whose growth is favored by warm conditions and high humidity and whose dispersal is aided by frequent rainfall during flowering season 2 .The most noticeable disease symptom of FHB is bleaching of floral spikelets, which often leads to cell death or the production of non-viable seeds 3. Since the early 1990s, it has been estimated that FHB infection in grain crops exerts an annual loss of US$3 billion 4,5. In addition to yield reduction, FHB also lowers grain quality by producing mycotoxins, including deoxynivalenol (DON), which accumulate in infected grains 6,7. DON-contaminated grains represent a serious health concern for both humans and livestock. Deployment of FHB-resistant wheat and barley cultivars provides the most direct way to address this problem as it simultaneously reduces yield loss and grain contamination. Genetic engineering offers a promising approach for manipulating plant disease resistance and susceptibility. A number of different transgenic approaches have been explored in order to generate plants that display enhanced FHB resistance or tolerance. These include the overexpression of pathogenesis-related (PR) or defense response genes 8-10 , overexpression of antifungal 11 or antimicrobial peptides 12 introduced from other species, the inhibition of DON synthesis 13-1...

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“…ROS production is involved in plant stress responses to both biotic and abiotic stresses, and is modulated by signaling pathways of multiple phytohormones, including ABA, salicylic acid (SA) and ethylene etc. 6 16 68 69 70 71 . Ethylene signaling pathway plays important roles in the regulation of ROS production 24 25 26 27 33 , and a number of the downstream ERF transcription factors in ethylene pathway function as regulators coordinating both biotic and abiotic stress responses 39 48 49 50 51 .…”

Section: Discussionmentioning

confidence: 99%

Ethylene Response Factor TERF1, Regulated by ETHYLENE-INSENSITIVE3-like Factors, Functions in Reactive Oxygen Species (ROS) Scavenging in Tobacco (Nicotiana tabacum L.)

Zhang

et al. 2016

Sci Rep

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The phytohormone ethylene plays a crucial role in the production and accumulation of reactive oxygen species (ROS) in plants under stress conditions. Ethylene response factors (ERFs) are important ethylene-signaling regulators functioning in plant defense responses against biotic and abiotic stresses. However, the roles of ERFs during plant adapting to ROS stress have not yet been well documented. Our studies previously reported that a tomato ERF transcription factor TERF1 functions in the regulation of plant ethylene responses and stress tolerance. Here, we report our findings regarding the roles of TERF1 in ROS scavenging. In this study, we revealed that the transcription of TERF1 is regulated by upstream EIN3-like (EIN3, ethylene-insensitive 3) regulators LeEIL3 and LeEIL4 in tomato (Solanum lycopersicum), and is also inducible by exogenous applied ROS-generating reagents. Ectopic expression of TERF1 in tobacco promoted the expression of genes involved in oxidative stress responses, including carbonic anhydrase functioning in hypersensitive defense, catalase and glutathione peroxidase catalyzing oxidative reactions, and GDP-D-mannose pyrophosphorylase functioning in ascorbic acid biosynthesis, reduced the ROS content induced by ethylene treatment, and enhanced stress tolerance of tobacco seedlings to hydrogen peroxide (H2O2). Cumulatively, these findings suggest that TERF1 is an ethylene inducible factor regulating ROS scavenging during stress responses.

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Salicylic acid-induced superoxide generation catalyzed by plant peroxidase in hydrogen peroxide-independent manner

Cited by 14 publications

References 37 publications

Methanol induces cytosolic calcium variations, membrane depolarization and ethylene production in arabidopsis and tobacco

Methanol induces cytosolic calcium variations, membrane depolarization and ethylene production in arabidopsis and tobacco

Validation of barley 2OGO gene as a functional orthologue of Arabidopsis DMR6 gene in Fusarium head blight susceptibility

Ethylene Response Factor TERF1, Regulated by ETHYLENE-INSENSITIVE3-like Factors, Functions in Reactive Oxygen Species (ROS) Scavenging in Tobacco (Nicotiana tabacum L.)

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