Journal Article

Systemic Resistance in <i>Arabidopsis</i> Conferred by the Mycorrhizal Fungus <i>Piriformospora indica</i> Requires Jasmonic Acid Signaling and the Cytoplasmic Function of NPR1

Elke Stein, Alexandra Molitor, Karl-Heinz Kogel and Frank Waller

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 49, issue 11, pages 1747-1751
Published in print November 2008 | ISSN: 0032-0781
Published online October 2008 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcn147
Systemic Resistance in Arabidopsis Conferred by the Mycorrhizal Fungus Piriformospora indica Requires Jasmonic Acid Signaling and the Cytoplasmic Function of NPR1

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  • Biochemistry
  • Molecular and Cell Biology
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We analyzed the requirement of specific defense pathways for powdery mildew (Golovinomyces orontii) resistance induced by the basidiomycete Piriformospora indica in Arabidopsis. Piriformospora indica root colonization reduced G. orontii conidia in wild-type (Col-0), npr1-3 (nonexpressor of PR genes 1-3) and NahG plants, but not in the npr1-1 null mutant. Therefore, cytoplasmic but not nuclear localization of NPR1 is required for P. indica-induced resistance. Two jasmonate signaling mutants were non-responsive to P. indica, and jasmonic acid-responsive vegetative storage protein expression was primed and thus elevated in response to powdery mildew, suggesting that P. indica confers resistance reminiscent of induced systemic resistance (ISR).

Keywords: Arabidopsis; Jasmonic Acid; NPR1; Piriformospora indica; Powdery mildew; Systemic disease resistance

Journal Article.  2538 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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