Plant elicitor peptides promote plant defences against nematodes in soybean

Lee, Min Woo; Huffaker, Alisa; Crippen, Devany; Robbins, R. T.; Goggin, Fiona L.

doi:10.1111/mpp.12570

Cited by 56 publications

(24 citation statements)

References 61 publications

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“…Elicitor-active Pep epitopes are embedded in the C-terminus of PROPEP precursors, and recognized by the class XI LRR-RLKs PEPR1/PEPR2 in A. thaliana. The Pep-PEPR system contributes to broadspectrum resistance against bacteria, fungi, oomycetes, nematodes and insects, and systemic immunity (Huffaker et al, 2006(Huffaker et al, , 2013Liu et al, 2013;Tintor et al, 2013;Ross et al, 2014;Lee et al, 2017). The lack of an N-terminal leader sequence implies membrane damage-dependent release of PROPEPs (or derived DAMPs).…”

Section: Recognition Of Host Cell Alterations (Damps)mentioning

confidence: 99%

Pattern recognition receptors and signaling in plant–microbe interactions

2018

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SUMMARYPlants solely rely on innate immunity of each individual cell to deal with a diversity of microbes in the environment. Extracellular recognition of microbe-and host damage-associated molecular patterns leads to the first layer of inducible defenses, termed pattern-triggered immunity (PTI). In plants, pattern recognition receptors (PRRs) described to date are all membrane-associated receptor-like kinases or receptor-like proteins, reflecting the prevalence of apoplastic colonization of plant-infecting microbes. An increasing inventory of elicitor-active patterns and PRRs indicates that a large number of them are limited to a certain range of plant groups/species, pointing to dynamic and convergent evolution of pattern recognition specificities. In addition to common molecular principles of PRR signaling, recent studies have revealed substantial diversification between PRRs in their functions and regulatory mechanisms. This serves to confer robustness and plasticity to the whole PTI system in natural infections, wherein different PRRs are simultaneously engaged and faced with microbial assaults. We review the functional significance and molecular basis of PRRmediated pathogen recognition and disease resistance, and also an emerging role for PRRs in homeostatic association with beneficial or commensal microbes.

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Section: Recognition Of Host Cell Alterations (Damps)mentioning

confidence: 99%

Pattern recognition receptors and signaling in plant–microbe interactions

2018

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“…Similarly, the loss of other DAMP receptors, PEPR1 and PEPR2 for plant elicitor peptides or DORN1 for extracellular ATP, fails to affect susceptibility to RKNs (Teixeira et al, 2016). However, it is possible that unknown DAMPs might be important for inducing immunity against RKNs, as PTI activation by exogenous application of known DAMPs is quite effective for suppressing the reproduction of RKNs (Lee et al, 2018).…”

Section: Recognition Of Ppnsmentioning

confidence: 99%

Plant Immune Responses to Parasitic Nematodes

2019

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Plant-parasitic nematodes (PPNs), such as root-knot nematodes (RKNs) and cyst nematodes (CNs), are among the most devastating pests in agriculture. RKNs and CNs induce redifferentiation of root cells into feeding cells, which provide water and nutrients to these nematodes. Plants trigger immune responses to PPN infection by recognizing PPN invasion through several different but complementary systems. Plants recognize pathogen-associated molecular patterns (PAMPs) sderived from PPNs by cell surface–localized pattern recognition receptors (PRRs), leading to pattern-triggered immunity (PTI). Plants can also recognize tissue and cellular damage caused by invasion or migration of PPNs through PRR-based recognition of damage-associated molecular patterns (DAMPs). Resistant plants have the added ability to recognize PPN effectors via intracellular nucleotide-binding domain leucine-rich repeat (NLR)-type immune receptors, leading to NLR-triggered immunity. Some PRRs may also recognize apoplastic PPN effectors and induce PTI. Plant immune responses against PPNs include the secretion of anti-nematode enzymes, the production of anti-nematode compounds, cell wall reinforcement, production of reactive oxygen species and nitric oxide, and hypersensitive response–mediated cell death. In this review, we summarize the recognition mechanisms for PPN infection and what is known about PPN-induced immune responses in plants.

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“…Since the initial discovery that systemin is a regulator of solanaceous anti-herbivore defenses a large number of peptide families have been found to amplify plant immune responses (McGurl et al, 1992;Yamaguchi and Huffaker, 2011;Ma et al, 2014;Yu et al, 2017b;Segonzac and Monaghan, 2019). While many of these peptides have only been identified in particular species, plant elicitor peptides (Peps) have emerged as widespread conserved signals across plant species, activating broadly protective immunity against microbial pathogens, parasitic nematodes and arthropod herbivores (Huffaker et al, 2011a(Huffaker et al, , 2013Trivilin et al, 2014;Lee et al, 2018;Ruiz et al, 2018b;Shinya et al, 2018;Zhang and Gleason, 2020).…”

Section: Introductionmentioning

confidence: 99%

Differential activities of maize plant elicitor peptides as mediators of immune signaling and herbivore resistance

et al. 2020

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Plant elicitor peptides (Peps) are conserved regulators of defense responses and models for the study of damage-associated molecular pattern-induced immunity. Although present as multigene families in most species, the functional relevance of these multigene families remains largely undefined. While Arabidopsis Peps appear largely redundant in function, previous work examining Pep-induced responses in maize (Zm) implied specificity of function. To better define the function of individual ZmPeps and their cognate receptors (ZmPEPRs), activities were examined by assessing changes in defense-associated phytohormones, specialized metabolites and global gene expression patterns, in combination with heterologous expression assays and analyses of CRISPR/Cas9-generated knockout plants. Beyond simply delineating individual ZmPep and ZmPEPR activities, these experiments led to a number of new insights into Pep signaling mechanisms. ZmPROPEP and other poaceous precursors were found to contain multiple active Peps, a phenomenon not previously observed for this family. In all, seven new ZmPeps were identified and the peptides were found to have specific activities defined by the relative magnitude of their response output rather than by uniqueness. A striking correlation was observed between individual ZmPep-elicited changes in levels of jasmonic acid and ethylene and the magnitude of induced defense responses, indicating that ZmPeps may collectively regulate immune output through rheostat-like tuning of phytohormone levels. Peptide structure-function studies and ligand-receptor modeling revealed structural features critical to the function of ZmPeps and led to the identification of ZmPep5a as a potential antagonist peptide able to competitively inhibit the activity of other ZmPeps, a regulatory mechanism not previously observed for this family.

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Plant elicitor peptides promote plant defences against nematodes in soybean

Cited by 56 publications

References 61 publications

Pattern recognition receptors and signaling in plant–microbe interactions

Pattern recognition receptors and signaling in plant–microbe interactions

Plant Immune Responses to Parasitic Nematodes

Differential activities of maize plant elicitor peptides as mediators of immune signaling and herbivore resistance

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