Abstract
Several applications of the suppressive fungus MKP5111B, isolated from the phylloplane of rice plants, were tested in an effort to control rice blast disease. Three treatments with MKP5111B [living (Std), killed with liquid nitrogen (FR), and autoclaved (AC)] were either sprayed onto rice seedlings or mixed into seed-sown soil. Three weeks after spraying and 4 weeks after the soil application, we introduced Magnaporthe oryzae, the causal agent of rice blast, into our systems. The Std and FR treatments suppressed rice blast, but the AC treatment proved ineffective. Although a suppressive effect was seen on new leaves, no mycelium of MKP5111B was seen. The fungus thus may have induced a systemic resistance in the rice plants. A substance from MKP5111B, such as elicitor molecule(s) are likely responsible for the induced resistance.
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Acknowledgments
We are grateful to Dr. Markus N. Thormann, Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre, Edmonton, Alberta, Canada, for critically reviewing this manuscript.
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Ohtaka, N., Kawamata, H. & Narisawa, K. Suppression of rice blast using freeze-killed mycelia of biocontrol fungal candidate MKP5111B. J Gen Plant Pathol 74, 101–108 (2008). https://doi.org/10.1007/s10327-007-0063-3
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DOI: https://doi.org/10.1007/s10327-007-0063-3