| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
We established a novel system to study rice-insect interactions. We showed that the accumulation of active defense hormone jasmonoyl-L-isoleucine (JA-Ile) in rice depends on the function of OsJAR1 enzyme. JA and JA-Ile accumulations in rice were controlled by the availability of the main pathway substrate, α-linolenic acid. In comparison to wounding, rice plants specifically responded to elicitors present in chewing herbivore oral secretions. We identified two novel herbivory-related phenolamide phytoalexins. Using ROS and rice phenolamides as molecular markers, we identified and partially purified a new putative insect elicitor from Mythimna loreyi oral secretions.
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