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Abstract
Jasmonic acid (JA) and salicylic acid (SA) play important roles in plant defense systems. JA and SA signaling pathways interact antagonistically in dicotyledonous plants, but, the status of crosstalk between JA and SA signaling is unknown in monocots. Our rice microarray analysis showed that more than half of the genes upregulated by the SA analog BTH are also upregulated by JA, suggesting that a major portion of the SA-upregulated genes are regulated by JA-dependent signaling in rice. A common defense system that is activated by both JA and SA is thus proposed which plays an important role in pathogen defense responses in rice.
Disclosure of Potential Conflicts of Interest
No potential conflicts of interest were disclosed.
Acknowledgments
We thank M. Satoh (National Agricultural Research Center for Kyushu Okinawa Region, NARO) and Dr H. Kanno (NARO) for laying the foundation of a part of this study. This work was supported in part by a Funding Program for Next Generation World-Leading Researchers from Japan Society for Promotion of Science (No. GS022).
