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Arabidopsis thaliana immunity-related compounds modulate disease susceptibility in Barley.

Agronomy 8:142 (2018)
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Open Access Gold
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Plants are exposed to numerous pathogens and fend off many of these with different phytohormone signalling pathways. Much is known about defence signalling in the dicotyledonous model plant Arabidopsisthaliana, but it is unclear to which extent knowledge from model systems can be transferred to monocotyledonous plants, including cereal crops. Here, we investigated the defence-inducing potential of Arabidopsis resistance-inducing compounds in the cereal crop barley. Salicylic acid (SA), folic acid (Fol), and azelaic acid (AzA), each inducing defence against (hemi-)biotrophic pathogens in Arabidopsis, were applied to barley leaves and the treated and systemic leaves were subsequently inoculated with Xanthomonastranslucens pv. cerealis (Xtc), Blumeria graminis f. sp. hordei (powdery mildew, Bgh), or Pyrenophora teres. Fol and SA reduced Bgh propagation locally and/or systemically, whereas Fol enhanced Xtc growth in barley. AzA reduced Bgh propagation systemically and enhanced Xtc growth locally. Neither SA, Fol, nor AzA influenced lesion sizes caused by the necrotrophic fungus P. teres, suggesting that the tested compounds exclusively affected growth of (hemi-)biotrophic pathogens in barley. In addition to SA, Fol and AzA might thus act as resistance-inducing compounds in barley against Bgh, although adverse effects on the growth of pathogenic bacteria, such as Xtc, are possible.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Systemic Acquired Resistance ; Barley ; Salicylic Acid ; Folic Acid ; Azelaic Acid ; Blumeriagraminis F ; Sp ; Hordei; Systemic Acquired-resistance; F-sp Hordei; Powdery Mildew Fungus; Salicylic-acid; Blumeria-graminis; Plant Immunity; Pipecolic Acid; Defense; Pathogens; Infection
ISSN (print) / ISBN 2073-4395
e-ISSN 2073-4395
Journal Agronomy
Quellenangaben Volume: 8, Issue: 8, Pages: , Article Number: 142 Supplement: ,
Publisher MDPI
Publishing Place Basel
Reviewing status Peer reviewed