2017 Fiscal Year Final Research Report
Damage from ultraviolet radiation and its protection and repair mechanisms in plant-dwelling mites
| Project/Area Number |
26292029
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Plant protection science
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
菅原 達也 京都大学, 農学研究科, 教授 (70378818)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Keywords | 紫外線適応 / 物理的防除 / 光回復 / Tetranychus urticae / Neoseiulus californicus / 生物的防除 / ハダニ / カブリダニ |
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| Outline of Final Research Achievements |
To contribute the development of a novel mite management technology using UVB radiation in greenhouse, we demonstrated 1) molecular mechanisms of UV damage and 2) protective function by antioxidants. With regard to 1), the interrelation between the accumulation of DNA lesion and mortality and photoreactivation were proven. Larvae exposed to UVB radiation died mostly at their protochrysalis stages. Structural protein genes were downregulated in damaged individuals at protochrysalis stage. We also found that low temperature enhanced control effects of UVB irradiation on spider mites. In 2), carotenoids contained in spider mite bodies were identified, and its protective function preventing from lipid peroxide accumulation was demonstrated. Moreover, it was demonstrated that a phytoseiid mite (natural enemy) received the protective effects by antioxidant compounds through pollen diet.
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| Free Research Field |
応用昆虫学
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