Abstract
Ca2+ as in other cellular signaling pathways plays a key signal-mediating function in plant immune responses. However, a negative immune activity of some Ca2+-binding calmodulins implicates a rather confusing function of Ca2+ despite its importance in plant immunity. We therefore studied here an effect of Ca2+ on Arabidopsis disease resistance to an adapted Golovinomyces orontii powdery mildew fungus. Pre-treatment with Ca2+ enhanced plant defense against G. orontii especially during late pathogenesis. A similar inhibition of G. orontii growth by Ca2+ was also observed in the salicylic acid-depleted nahG plants. Golovinomyces orontii-dependent induction of defense genes by Ca2+ suggests that it acts as a defense-priming factor in plant post-invasive resistance to adapted powdery mildew fungal pathogens.
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Acknowledgments
This work was supported by Grants from the Rural Development Administration (PJ009763), the Next-Generation BioGreen 21 Program (PJ009516 supported by Rural Development Administration) and the National Research Foundation (2013R1A1A2058295 and 2014R1A1A2A16050549).
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The authors declare that they have no conflict of interest.
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Gayoung Lee, Chian Kwon, and Soohong Kim have contributed equally to this work.
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Lee, G., Kwon, C., Kim, S. et al. Calcium potentiates post-invasive resistance to Golovinomyces orontii fungus in Arabidopsis. Genes Genom 37, 545–550 (2015). https://doi.org/10.1007/s13258-015-0283-4
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DOI: https://doi.org/10.1007/s13258-015-0283-4