Rice terpene synthase 18 (OsTPS18) encodes a sesquiterpene synthase that produces an antibacterial (E)-nerolidol against a bacterial pathogen of rice
Plant volatile compounds, including terpenes, are known to be involved in the rice defense system. In the present analysis of a terpene synthase, OsTPS18, in rice, we found that OsTPS18 was localized in the cytoplasm and synthesized the sesquiterpenes (E)-nerolidol and (E)-β-farnesene. The amounts of (E)-nerolidol and (E)-β-farnesene increased after jasmonic acid (JA) treatment. (E)-Nerolidol had significant antibacterial activity against Xanthomonas oryzae pv. oryzae (Xoo). These results suggest that (E)-nerolidol plays an important role in JA-induced resistance against Xoo and that it functions as an antibacterial compound in rice.
KeywordsJasmonic acid Plant volatiles Rice Terpene synthase (E)-nerolidol
We thank Dr. H. Kaku (National Institute of Agrobiological Sciences, NIAS) and I. Mitsuhara (NIAS) for providing Xoo and pE7133 vector, respectively. We also thank M. Satoh (National Agricultural Research Center for Kyushu Okinawa Region, NARO) and Dr. H. Kanno (NARO) for laying the foundation for part of this study.
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