2013 Fiscal Year Final Research Report
Development of new cambial marking method by using high DC volage pulse.
| Project/Area Number |
23658127
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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 |
Forest science
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| Research Institution | Kyoto University |
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Principal Investigator |
OKADA Naoki 京都大学, 地球環境学堂, 准教授 (40335302)
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| Co-Investigator(Kenkyū-buntansha) |
SEINO Tatsuyuki 筑波大学, 大学院・生命環境科学研究科(系), 准教授 (40362420)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 熱帯樹木 / 成長輪 / 形成層 / 高電圧パルス |
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| Research Abstract |
DC high voltage pulse was applied to tree cambium to develop an effective cambial marking method for estimating tree growth of ring-less tropical trees. In addition, bio-impedance of tree cambium was also monitored for estimating seasonal changes of cambial activity. Temperate tree species formed abnormal cells and tissues by treating 300-500 v. The degree of abnormal tissue formation was different by species, but common features were observed as follows: (1) formation of thick-walled vessel element and wood fibers, (2) increase in tangential row of ray cells, and formation of abnormal-shaped ray parenchyma cells, and (3) formation of colored-substances in parenchyma cells. The value of impedance showed seasonal changes, probably reflecting the difference of cambial activity.
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