| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2018: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
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| Outline of Final Research Achievements |
Striga hermonthica is a noxious root parasitic weed which attacks economically important Poaceous plants. Striga-infected plants display wilting and chlorosis even before Striga emerges above the ground, a phenomenon known as bewitching effect. The present investigation was undertaken to examine tolerance and resistance to Striga in rice. Screening of selected rice varieties revealed large varietal differences in terms of germination inducing activity of root exudates and resistance to haustorial penetration into the host roots, thus suggesting the feasibility of selection of rice varieties invulnerable to Striga. An unknown germination stimulant and abscisic acid (ABA) were detected in host-free Striga plants. Striga seedlings exuded a considerable amount of ABA, which could contribute to the bewitching effect. The need for exogenous stimulant to induce Striga germination and the presence of endogenous stimulant in Striga plants are intriguing and worth further investigations.
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