| Project/Area Number |
26550045
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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 |
Environmental impact assessment
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| Research Institution | Saitama University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
RAJAGOPALAN UmaMaheswari 東洋大学, 食環境科学部, 助教 (40270706)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 重金属ストレス / 植物成長の自発的ナノメートル揺らぎ / 光干渉法 / レーザースペックル / 微量必須元素 / 重金属汚染 / 極短時間植物成長動態 / 極短時間植物成長ゆらぎ / 統計干渉法 / 重金属 / 植物成長速度 / カドミウム / 亜鉛 / ナノメートル成長揺らぎ / 環境評価 |
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| Outline of Final Research Achievements |
Leaf expansion measurements using Statistical Interferometry Technique, a sensitive interferometric technique at nanometric accuracy, revealed the presence of characteristic nanometric intrinsic fluctuations (NIF). In this study, we demonstrated that NIF are sensitive enough that they change under exposure of heavy metals, essential micronutrient zinc (Zn) and non-essential element cadmium (Cd), at relatively low concentrations. Results showed significant reduction of NIF for all Cd concentrations, and in contrast significant increase of the NIF for all Zn concentrations. There was significant reduction of the NIF for Cd exposure of concentrations of 0.001mM for even an hour, and significant increase of the NIF under 0.15mM Zn for 1hr exposure.
The results imply that NIF can be not only used as a measure for the heavy metal stress but also it can be more sensitive to detect the toxic as well as positive effects of smaller amounts of the heavy metal on plants at an early stage.
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