2005 Fiscal Year Final Research Report Summary
Origin of unusual tension stress in the aerial root of Ficus species-Structure and biomechanics of strangler trees
| Project/Area Number |
15405015
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Biophysics
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| Research Institution | Nagoya University |
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Principal Investigator |
YAMAMOTO Hiroyuki Nagoya University, Graduate School of Bio-agricultural Sciences, Professor (50210555)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Masato Nagoya University, Graduate School of Bio-agricultural Sciences, Research Associate (30242845)
OKUYAMA Takashi Nagoya University, Graduate School of Bio-agricultural Sciences, Professor (00023482)
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| Project Period (FY) |
2003 – 2005
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| Keywords | Ficus elastica Roxb. / Ficus benjamina Lour. / gelatinous fiber / plant biomechanics / growth stress / strangler tree / aerial root / plant habitat |
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| Research Abstract |
In this study, the survival strategy of strangler plants was investigated from the viewpoint of tissue mechanics. Release strain measurements were conducted on the aerial roots of Ficus benjamina Lour. and Ficus elastica Roxb. to understand stress generation in aerial roots. Regardless of whether the roots are small roots that are directly attached to the ground (Type I), small roots that have merged with other roots without reaching the ground (Type II), or large roots that are directly attached to the ground (Type III), all gave negative strain values indicating that they were under tensile stress prior to measurements. Such strains were inversely affected by the strain gauge distance from the root attachment (either to the ground or to other roots) and by the root diameter. Tensile stresses emanated from the gelatinous fibers found near the pith of the roots. The gelatinous layer in aerial root showed a typical morphology and strength as observed in the tension wood xylem of the stem.
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Research Products
(8 results)
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[Presentation] Characterization of the gelatinous layer as origins of the xylem properties peculiar to the tension wood.2005
Author(s)
Yamamoto, H., Arakawa, Y., Abe, K., Okuyama, T., Yoshida, M.
Organizer
The 5th Pacific Regional Wood Anatomy Conference, Austria Center
Place of Presentation
Kyoto, Japan
Year and Date
20051200
Description
「研究成果報告書概要(欧文)」より
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