| Project/Area Number |
16K14858
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Plant protection science
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
金子 俊郎 東北大学, 工学研究科, 教授 (30312599)
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 大気圧プラズマ / 植物病原体 / 活性酸素種 / 活性窒素種 / 植物病害防除 / 植物免疫 / タバコモザイクウイルス / 病害抑制 / 植物病理 |
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| Outline of Final Research Achievements |
When rice seeds were irradiated with atmospheric plasma, the occurrence of "Bakanae disease" and bacterial damping-off disease in rice seedlings was suppressed. Irradiation of Arabidopsis thaliana with plasma reduced the level of virus multiplication. It has been known that reactive oxygen species act as a signaling molecule for plant immune system. Interestingly, the comprehensive analysis of reactive molecules produced by atmospheric plasma irradiation indicated that peroxynitrite (HOONO) and pernitric acid (HOONO2), which have antimicrobial activity, and N2O5 accumulated in gas phase, and NO3- was detected in liquid phase. Furthermore, in plants irradiated with atmospheric plasma, defense-related gene expression: PR1, PDF1.2 and ChiB, was significantly induced, suggesting that plant immune system seems to be activated by irradiation of plants with atmospheric plasma.
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| Academic Significance and Societal Importance of the Research Achievements |
プラズマを植物種子や葉に照射することにより、殺菌作用や植物免疫を介して病気の発生を抑制できることが明らかになった。これらの知見は、プラズマを活用することにより、農薬のみに依存しない病害防除と安全・安心な農産物の生産の実現や、農薬の使用を削減することによる環境保全への貢献が期待できる。
さらに、プラズマ照射により生成される活性分子種が明らかになったことは、プラズマ照射が植物の生育に及ぼす影響（効果）を明らかにする上で、重要な知見を提供したことになる。
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