| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2012: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2011: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
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| Research Abstract |
We focused on sclareol, a natural labdane-type diterpene known as the antimicrobial and defense-related molecule, and investigated whether and how sclareol application on plant body inhibits RKN infection to tomato and Arabidopsis roots. Plants that received sclareol application suppressed RKN infection, except for the ethylene (ET) insensitive mutant ein2-1.
Exogenously applied sclareol enhanced EIN2-dependent pathway and induced expression of lignin biosynthetic genes in roots of the plant. Accumulation of lignin in the roots which was caused by the activation of phenylpropanoid pathway resulted in suppression of invasion of RKN. Sclareol-induced RKN resistance was compromised in the Arabidopsis mutant deficient in a lignin biosynthetic gene, suggesting that lignin is involved in the sclareol-induced resistance against RKN.
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