| Project/Area Number |
03454078
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
林産学
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| Research Institution | Hokkaido University |
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Principal Investigator |
OHTANI Jun Hokkaido University, Faculty of Agriculture, Associate Professor, 農学部, 助教授 (30001465)
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| Co-Investigator(Kenkyū-buntansha) |
SANO Yuzou Hokkaido University, Faculty of Agriculture, Instructor, 農学部, 助手 (90226043)
FUNADA Ryo Hokkaido University, Faculty of Agriculture, Instructor, 農学部, 助手 (20192734)
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| Project Period (FY) |
1991 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥6,600,000 (Direct Cost: ¥6,600,000)
Fiscal Year 1993: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1992: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1991: ¥5,100,000 (Direct Cost: ¥5,100,000)
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| Keywords | Tyloses / Gums / Ray parenchyma cell / Axial parenchyma cell / Japanese hardwoods / SEM / Vessel / 走査電子顕微境 / ガム様物質 / 道管柔細胞間壁孔 / チロ-ス / 環孔材 / 散孔材 |
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| Research Abstract |
the occurrenceand morphology of natural tyloses and gums in the vessels of 50 Japanese hardwoods (15 ring-, 34 diffuse- and 1 radial-porous woods) were investigated using SEM.Tyloses were present exclusively or predominantly in 23 species (12 ring-, 10 diffuse- and 1 radial-porous woods) and gums in 15 species (3 ring- and 12 diffuse-porous woods). In the pore zones of most of the ring-porous woods both tyloses and gums first occurred in an earlier ring number from the bark than in the diffuse- and radial-porous woods. Tyloses and gums originated from both ray and axial parenchyma cells in most species which have pt pairs connecting these cells to the vessels. Except for four species, the maximum and minimum diameters of the inner pit aperture from vessels to parenchyma cells were greater than 5 and 2 mu m. respectively, in those species with tyloses, whereas, the diameters were less than these values in species having gums. The forms of tylowis blockings in hardwood vessels were closely related to parenchyma patterns.
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