Journal of the Korean Wood Science and Technology
- Volume 21 Issue 4
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- Pages.60-63
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- 1993
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- 1017-0715(pISSN)
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- 2233-7180(eISSN)
A Study on the Distribution of Pits on the Tracheid in Pinus koraiensis
잣나무 가도관(假導管)의 벽공(壁孔) 분포(分布)의 변이(變異)
- Lee, Seung-Hwan (College of Forestry, Kangwon National University) ;
- Lee, Sung-Jae (College of Forestry, Kangwon National University) ;
- Lee, Won-Yong (College of Forestry, Kangwon National University)
- Received : 1993.10.08
- Published : 1993.12.30
Abstract
In the present paper, we discribed distributions patterns of pits on the tracheids of Pinus koraiensis. The number of bordered pits on a tracheid is more numerous than that of cross-field pittings. And they appeared different in the number depending on the shape and size of tracheids. Both pit and cross-field pitting on a tracheid is fewer in number near the pith. The number of bordered pits on the tracheid increased rapidly from pith toward cambial zone but that of cross-field pittings increased gradually. The number of bordered pit and corss-field pitting is more frequent in the first-formed tracheid, and the number of bordered pit decreased rapidly from earlywood to latewood but that of corss-field pittings decreased gradually. Bordered pits on a tracheid are more numerous at the end of tracheids and cross-field pittings occur more frequently in the center part of a tracheid.