| Budget Amount *help |
¥44,590,000 (Direct Cost: ¥34,300,000、Indirect Cost: ¥10,290,000)
Fiscal Year 2011: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2010: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Fiscal Year 2009: ¥27,950,000 (Direct Cost: ¥21,500,000、Indirect Cost: ¥6,450,000)
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| Research Abstract |
The lepidopteran insects have specific relationships with their host plants. The mulberry contains toxic sugar-mimic alkaloids s, and the insects fed on mulberry must overcome their toxicity. We compared the function of the midut sucrases, which may play a crucial role in the tolerance to the alkaloids, between mulberry feeders such as Bombyx mori and Rondotia menciana and closely-related non-mulberry feeders such as Trilocha varians. As the result, we found that mRNAs for alkaloid-resistant sucrases are more highly expressed in mulberry feeders than in non-mulberry ones. We also found a gene encoding an enzyme that plays an important role in the metabolism of quercetin, a component in mulberry.
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