Abstract
In spite of more severe effect on crop productivity, difficulties in artificial culturing and plant inoculation lead to less understanding of plant defense responses to fungal pathogens compared to bacteria. Therefore, it is of great importance to better understand detailed plant defense responses to fungal pathogens. We here show that the commercially available yeast extract includes at least a fungal pathogen-associated molecular pattern (PAMP) to induce defense gene expression via the mitogen-activated protein kinase activation in Arabidopsis plants. Yeast extract induced the expression of PR1 and EDS5 genes in the salicylic acid-deficient nahG plants. Induction of PR1 and EDS5 gene expression by proteinase K-treated yeast extract suggests that at least a non-proteinaceous fungal PAMP in yeast extract induces the PAMP-triggered immunity in Arabidopsis plants in a manner independent of salicylic acid.
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Moon, H., Lee, G., Yun, H.S. et al. Non-proteinaceous yeast extract induces arabidopsis defense responses independently of salicylic acid. J. Plant Biol. 58, 38–43 (2015). https://doi.org/10.1007/s12374-014-0430-5
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DOI: https://doi.org/10.1007/s12374-014-0430-5