| Budget Amount *help |
¥116,870,000 (Direct Cost: ¥89,900,000、Indirect Cost: ¥26,970,000)
Fiscal Year 2020: ¥22,880,000 (Direct Cost: ¥17,600,000、Indirect Cost: ¥5,280,000)
Fiscal Year 2019: ¥22,880,000 (Direct Cost: ¥17,600,000、Indirect Cost: ¥5,280,000)
Fiscal Year 2018: ¥23,400,000 (Direct Cost: ¥18,000,000、Indirect Cost: ¥5,400,000)
Fiscal Year 2017: ¥23,400,000 (Direct Cost: ¥18,000,000、Indirect Cost: ¥5,400,000)
Fiscal Year 2016: ¥24,310,000 (Direct Cost: ¥18,700,000、Indirect Cost: ¥5,610,000)
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| Outline of Final Research Achievements |
Focusing on the early reproductive process, starting from pollen adhesion, pollen germination, and resulting in pollen-tube growth, we tried to find out the key molecules involved in interspecies incompatibility. As a result, we succeeded in identifying a novel barrier molecule named SPRI1, functioning in the stigma of Arabidopsis thaliana. SPRI1 is an unrecognized molecule that actively rejects pollen grains from foreign species, providing another path to our understanding of interspecies barrier. From another genetic screening, we found that pollen grains with defects in a phospholipid transporter failed to efficiently germinate and failed to induce compatible reactions in stigma. This finding gives us a new clue to elucidate the mechanism of cooperative reproductive process after compatible pollination.
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