The local and systemic accumulation of ethylene determines the rapid defence responses induced by flg22 in tomato (Solanum lycopersicum L.)

Czékus, Zalán; Martics, Atina; Pollák, Boglárka; Kukri, András; Tari, Irma; Ördög, Attila; Poór, Péter

doi:10.1016/j.jplph.2023.154041

Cited by 6 publications

(3 citation statements)

References 79 publications

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“…Plant hormones (including jasmonic acid-JA, salicylic acid-SA, abscisic acid-ABA and ethylene-ET) are essential in plant defence responses to both biotic and abiotic stress (Devireddy et al, 2021;Farmer et al, 2020;Hilleary & Gilroy, 2018;Waadt et al, 2022) et al, 2010;Myers et al, 2023). The role for ET in the induction of local and systemic ROS during plant immunity may be potentially conserved among multiple plant species, with A. thaliana and Solanum lycopersicum both displaying a reliance on ET for immune signalling (Czékus et al, 2023;Mersmann et al, 2010). Interestingly, in ETinsensitive mutants ein2 and etr1, systemic ROS responses are present following high light stress but abolished following wounding stress suggesting that each hormone may have differential roles in systemic ROS responses that are stress-specific (Myers et al, 2023).…”

Section: The Stress Response Dynamicsmentioning

confidence: 99%

Functional analysis of reactive oxygen species‐driven stress systemic signalling, interplay and acclimation

Myers,

Peláez‐Vico,

Fichman

2024

Plant Cell & Environment

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Reactive oxygen species (ROS) play a critical role in plant development and stress responses, acting as key components in rapid signalling pathways. The ‘ROS wave’ triggers essential acclimation processes, ultimately ensuring plant survival under diverse challenges. This review explores recent advances in understanding the composition and functionality of the ROS wave within plant cells. During their initiation and propagation, ROS waves interact with other rapid signalling pathways, hormones and various molecular compounds. Recent research sheds light on the intriguing lack of a rigid hierarchy governing these interactions, highlighting a complex interplay between diverse signals. Notably, ROS waves culminate in systemic acclimation, a crucial outcome for enhanced stress tolerance. This review emphasizes the versatility of ROS, which act as flexible players within a network of short‐ and long‐term factors contributing to plant stress resilience. Unveiling the intricacies of these interactions between ROS and various signalling molecules holds immense potential for developing strategies to augment plant stress tolerance, contributing to improved agricultural practices and overall ecosystem well‐being.

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Section: The Stress Response Dynamicsmentioning

confidence: 99%

Functional analysis of reactive oxygen species‐driven stress systemic signalling, interplay and acclimation

Myers,

Peláez‐Vico,

Fichman

2024

Plant Cell & Environment

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“…The most studied plant defense elicitor peptide is flg22-OH , a 22 amino acid sequence of the N-terminus of flagellin of Pseudomonas aeruginosa (Felix et al 1999 ; Zipfel et al 2004 ; Sun et al 2013 ; Liu et al 2015 ; Czékus et al 2023 ). Plant species such as A. thaliana, S. lycopersicum, and N. tabacum respond to flg22-OH (Zipfel et al 2004 ; Sun et al 2013 ; Liu et al 2015 ; Montesinos et al 2021 ; Czékus et al 2023 ), whereas other species like Actinidia arguta do not have flg22 -OH receptors but recognize other epitopes of flagellin such as flgII-28 or CD2-1 (Trdá et al 2014 ; Veluchamy et al 2014 ; Ciarroni et al 2018 ; Murakami et al 2022 ). Thus, plant responses to a given elicitor peptide may differ among species and it is necessary to test elicitor peptides directly in the crop plant species of interest.…”

Section: Introductionmentioning

confidence: 99%

Prunus dulcis response to novel defense elicitor peptides and control of Xylella fastidiosa infections

Moll,

Giralt,

Planas

et al. 2024

Plant Cell Rep

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Key message New defense elicitor peptides have been identified which control Xylella fastidiosa infections in almond. Abstract Xylella fastidiosa is a plant pathogenic bacterium that has been introduced in the European Union (EU), threatening the agricultural economy of relevant Mediterranean crops such as almond (Prunus dulcis). Plant defense elicitor peptides would be promising to manage diseases such as almond leaf scorch, but their effect on the host has not been fully studied. In this work, the response of almond plants to the defense elicitor peptide flg22-NH2 was studied in depth using RNA-seq, confirming the activation of the salicylic acid and abscisic acid pathways. Marker genes related to the response triggered by flg22-NH2 were used to study the effect of the application strategy of the peptide on almond plants and to depict its time course. The application of flg22-NH2 by endotherapy triggered the highest number of upregulated genes, especially at 6 h after the treatment. A library of peptides that includes BP100-flg15, HpaG23, FV7, RIJK2, PIP-1, Pep13, BP16-Pep13, flg15-BP100 and BP16 triggered a stronger defense response in almond plants than flg22-NH2. The best candidate, FV7, when applied by endotherapy on almond plants inoculated with X. fastidiosa, significantly reduced levels of the pathogen and decreased disease symptoms. Therefore, these novel plant defense elicitors are suitable candidates to manage diseases caused by X. fastidiosa, in particular almond leaf scorch.

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“…They may have variable structures, the most common of which are oligosaccharides, peptides, glycopeptides, and proteins [11]. The following examples of well-studied biogenic inducers represent their main structural classes: β-glucans [27][28][29], chitin [30,31], and chitosan [32,33] are the typical fungal oligosaccharide inducers; flg22 [34][35][36][37][38] is a peptide inducer from bacterial flagella; BcGs1 [39] is a fungal glycopeptide inducer isolated from Botrytis cinerea; and bacterial harpins [40][41][42] are examples of protein inducers.…”

Section: Introductionmentioning

confidence: 99%

Some Structural Elements of Bacterial Protein MF3 That Influence Its Ability to Induce Plant Resistance to Fungi, Viruses, and Other Plant Pathogens

Erokhin,

Popletaeva,

Sinelnikov

et al. 2023

IJMS

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The ability of the MF3 protein from Pseudomonas fluorescens to protect plants by inducing their resistance to pathogenic fungi, bacteria, and viruses is well confirmed both in greenhouses and in the field; however, the molecular basis of this phenomenon remains unexplored. To find a relationship between the primary (and spatial) structure of the protein and its target activity, we analyzed the inducing activity of a set of mutants generated by alanine scanning and an alpha-helix deletion (ahD) in the part of the MF3 molecule previously identified by our group as a 29-amino-acid peptide working as the inducer on its own. Testing the mutants’ inducing activity using the “tobacco–tobacco mosaic virus” pathosystem revealed that some of them showed an almost threefold (V60A and V62A) or twofold (G51A, L58A, ahD) reduction in inducing activity compared to the wild-type MF3 type. Interestingly, these mutations demonstrated close proximity in the homology model, probably contributing to MF3 reception in a host plant.

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The local and systemic accumulation of ethylene determines the rapid defence responses induced by flg22 in tomato (Solanum lycopersicum L.)

Cited by 6 publications

References 79 publications

Functional analysis of reactive oxygen species‐driven stress systemic signalling, interplay and acclimation

Functional analysis of reactive oxygen species‐driven stress systemic signalling, interplay and acclimation

Prunus dulcis response to novel defense elicitor peptides and control of Xylella fastidiosa infections

Some Structural Elements of Bacterial Protein MF3 That Influence Its Ability to Induce Plant Resistance to Fungi, Viruses, and Other Plant Pathogens

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