| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2019: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2018: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2017: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Outline of Final Research Achievements |
Brassicaceae plants defend themselves against herbivores by producing isothiocyanates in the wounded tissues. To examine the defensive efficacy of this compound against feeding motivation of insects, we adopted the PER test in the blowfly toward sucrose in the presence of taste or odor of the seedling homogenate of Arabidopsis thaliana, a model plant of Brassicaceae. We found that either the taste or odor of the homogenate exhibited negative effect on the fly feeding motivation, so that the PER threshold concentration of sucrose was significantly increased. However, some Arabidopsis mutants that could not produce isothiocyanate did not have such a negative effects. Instead, odor of the homogenate of Lotus japonicus that produces a cyanide, phylogenetically older defensive compound having oral toxicity, did not suppress feeding motivation in the fly.
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