Mechanisms underlying iron deficiency-induced resistance against pathogens with different lifestyles

Trapet, Pauline; Verbon, Eline H.; Bosma, Renda R; Voordendag, Kirsten; Pelt, J.A. van; Pieterse, Corné M. J.

doi:10.1093/jxb/eraa535

Cited by 33 publications

(31 citation statements)

References 77 publications

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“…Mutant bglu42 plants are impaired in WCS417-ISR, while BGLU42-overexpressing plants show enhanced resistance against B. cinerea, H. arabidopsidis, and P. syringae pv. tomato (Trapet et al 2020;Zamioudis et al 2014), indicating that BGLU42 is an important component in WCS417-ISR (Fig. 3).…”

Section: The Root Of Wcs417-isrmentioning

confidence: 96%

Pseudomonas simiae WCS417: star track of a model beneficial rhizobacterium

et al. 2020

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Background Since the 1980s, numerous mutualistic Pseudomonas spp. strains have been used in studies on the biology of plant growth-promoting rhizobacteria (PGPR) and their interactions with host plants. In 1988, a strain from the Pseudomonas fluorescens group, WCS417, was isolated from lesions of wheat roots growing in a take-all disease-suppressive soil. In subsequent trials, WCS417 limited the build-up of take-all disease in field-grown wheat and significantly increased wheat yield. In 1991, WCS417 was featured in one of the first landmark studies on rhizobacteria-induced systemic resistance (ISR), in which it was shown to confer systemic immunity in carnation (Dianthus caryophyllus) against Fusarium wilt. The discovery that WCS417 conferred systemic immunity in the model plant species Arabidopsis thaliana in 1996 incited intensive research on the molecular mechanisms by which PGPR promote plant growth and induce broad-spectrum disease resistance in plants. Since then, the strain name appeared in over 750 studies on beneficial plant-microbe interactions. Scope In this review, we will highlight key discoveries in plant-microbe interactions research that have emerged from over 30 years of research featuring WCS417 as a model rhizobacterial strain. WCS417 was instrumental in improving our understanding of the microbial determinants that are involved in root colonization and the establishment of mutually beneficial interactions with the host plant. The model strain also provided novel insight into the molecular mechanisms of plant growth promotion and the onset and expression of rhizobacteria-ISR. More recently, WCS417 has been featured in studies on host immune evasion during root colonization, and chemical communication in the rhizosphere during root microbiome assembly. Conclusions Numerous studies on the modes of action of WCS417 have provided major conceptual advances in our understanding of how free-living mutualists colonize the rhizosphere, modulate plant immunity, and promote plant growth. The concepts may prove useful in our understanding of the molecular mechanisms involved in other binary plant-beneficial microbe interactions, and in more complex microbial community contexts, such as the root microbiome.

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Section: The Root Of Wcs417-isrmentioning

confidence: 96%

Pseudomonas simiae WCS417: star track of a model beneficial rhizobacterium

et al. 2020

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“…A similar situation under K + -deficiency was reported with leaf spot, caused by Helminthosporium cynodontis (Richardson and Croughan, 1989 ). Other examples of mineral deficiency that favor pathogen resistance were zinc (Cabot et al, 2019 ) and iron (Trapet et al, 2021 ). Readers can find a detailed description of the dual role of the macro-and micronutrients for the infection by bacterial and fungal pathogens elsewhere (Huber et al, 2012 ).…”

Section: Discussionmentioning

confidence: 99%

Stomatal Closure Sets in Motion Long-Term Strategies of Plant Defense Against Microbial Pathogens

2021

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“…This indicates that whereas low P itself increased disease susceptibility of plants, it decreased susceptibility of plants in the presence of AMF through AMF-induced systemic resistance. There are also increasing reports evidencing a relationship between iron (Fe) deficiency and induced systemic resistance [78][79][80].…”

Section: Isr Activation In the Plant: Interactions With Plant Responses To Other Abiotic Factors In The Environmentmentioning

confidence: 99%

Tackling the Context-Dependency of Microbial-Induced Resistance

et al. 2021

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Plant protection with beneficial microbes is considered to be a promising alternative to chemical control of pests and pathogens. Beneficial microbes can boost plant defences via induced systemic resistance (ISR), enhancing plant resistance against future biotic stresses. Although the use of ISR-inducing microbes in agriculture seems promising, the activation of ISR is context-dependent: it often occurs only under particular biotic and abiotic conditions, thus making its use unpredictable and hindering its application. Although major breakthroughs in research on mechanistic aspects of ISR have been reported, ISR research is mainly conducted under highly controlled conditions, differing from those in agricultural systems. This forms one of the bottlenecks for the development of applications based on ISR-inducing microbes in commercial agriculture. We propose an approach that explicitly incorporates context-dependent factors in ISR research to improve the predictability of ISR induction under environmentally variable conditions. Here, we highlight how abiotic and biotic factors influence plant–microbe interactions in the context of ISR. We also discuss the need to raise awareness in harnessing interdisciplinary efforts between researchers and stakeholders partaking in the development of applications involving ISR-inducing microbes for sustainable agriculture.

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Mechanisms underlying iron deficiency-induced resistance against pathogens with different lifestyles

Cited by 33 publications

References 77 publications

Pseudomonas simiae WCS417: star track of a model beneficial rhizobacterium

Pseudomonas simiae WCS417: star track of a model beneficial rhizobacterium

Stomatal Closure Sets in Motion Long-Term Strategies of Plant Defense Against Microbial Pathogens

Tackling the Context-Dependency of Microbial-Induced Resistance

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