Ectomycorrhizal fungi induce systemic resistance against insects on a nonmycorrhizal plant in a CERK1‐dependent manner

Kishore Vishwanathan; Krzysztof Zienkiewicz; Yang Liu; Dennis Janz; Ivo Feussner; Andrea Polle; Cara H. Haney

doi:10.1111/nph.16715

journal article Open Access Jul 08, 2020

Ectomycorrhizal fungi induce systemic resistance against insects on a nonmycorrhizal plant in a CERK1‐dependent manner

Kishore Vishwanathan

Krzysztof Zienkiewicz Yang Liu

Dennis Janz Ivo Feussner Andrea Polle Cara H. Haney

New Phytologist Vol. 228 No. 2 pp. 728-740 · Wiley

View at Publisher Save 10.1111/nph.16715

Abstract

Summary

Below‐ground microbes can induce systemic resistance against foliar pests and pathogens on diverse plant hosts. The prevalence of induced systemic resistance (ISR) among plant‐microbe‐pest systems raises the question of host specificity in microbial induction of ISR.

To test whether ISR is limited by plant host range
,
we tested the ISR‐inducing ectomycorrhizal fungus
Laccaria bicolor
on the nonmycorrhizal plant
Arabidopsis thaliana
. We used the cabbage looper
Trichoplusia ni
and bacterial pathogen
Pseudomonas syringae
pv.
tomato
DC3000 (
Pto
) as readouts for ISR on
Arabidopsis
.

We found that root inoculation with
L. bicolor
triggered ISR against
T. ni
and induced systemic susceptibility (ISS) against the bacterial pathogen
Pto
. We found that
L. bicolor‐
triggered ISR against
T. ni
was dependent on jasmonic acid signaling and salicylic acid biosynthesis and signaling. Heat‐killed
L. bicolor
and chitin were sufficient to trigger ISR against
T. ni
and ISS against
Pto
. The chitin receptor CERK1 was necessary for
L. bicolor‐
mediated effects on systemic immunity.

Collectively our findings suggest that some ISR responses might not require intimate symbiotic association, but rather might be the result of root perception of conserved microbial signals.

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Details

Published: Jul 08, 2020
Vol/Issue: 228(2)
Pages: 728-740
License: View

Authors

K

Kishore Vishwanathan

Department of Forest Botany and Tree Physiology Buesgen‐Institute and Göttingen Center for Molecular Biosciences (GZMB) University of Göttingen Göttingen 37077 Germany; Michael Smith Laboratories The University of British Columbia Vancouver BC V6T 1Z4 Canada

K

Krzysztof Zienkiewicz

Department of Plant Biochemistry Albrecht‐von‐Haller‐Institute and Göttingen Center for Molecular Biosciences (GZMB) University of Göttingen Göttingen 37077 Germany

Y

Yang Liu

Department of Microbiology and Immunology The University of British Columbia Vancouver BC V6T 1Z3 Canada

D

Dennis Janz

Department of Forest Botany and Tree Physiology Buesgen‐Institute and Göttingen Center for Molecular Biosciences (GZMB) University of Göttingen Göttingen 37077 Germany

I

Ivo Feussner

Department of Plant Biochemistry Albrecht‐von‐Haller‐Institute and Göttingen Center for Molecular Biosciences (GZMB) University of Göttingen Göttingen 37077 Germany; Service Unit for Metabolomics and Lipidomics Göttingen Center for Molecular Biosciences (GZMB) University of Göttingen Göttingen 37077 Germany

A

Andrea Polle

Department of Forest Botany and Tree Physiology Buesgen‐Institute and Göttingen Center for Molecular Biosciences (GZMB) University of Göttingen Göttingen 37077 Germany

C

Cara H. Haney

Michael Smith Laboratories The University of British Columbia Vancouver BC V6T 1Z4 Canada; Department of Microbiology and Immunology The University of British Columbia Vancouver BC V6T 1Z3 Canada

Funding

Deutsche Forschungsgemeinschaft Award: INST 186/822‐1

Natural Sciences and Engineering Research Council of Canada Award: CREATE‐PRoTECT

Cite This Article

Kishore Vishwanathan, Krzysztof Zienkiewicz, Yang Liu, et al. (2020). Ectomycorrhizal fungi induce systemic resistance against insects on a nonmycorrhizal plant in a CERK1‐dependent manner. New Phytologist, 228(2), 728-740. https://doi.org/10.1111/nph.16715

Ectomycorrhizal fungi induce systemic resistance against insects on a nonmycorrhizal plant in a CERK1‐dependent manner

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