Pekka Saranpää 
Kontortamännyn runkopuun trakeidien pituuden, halkaisijan ja soluseinän paksuuden vaihtelu.
Saranpää P. (1985). Kontortamännyn runkopuun trakeidien pituuden, halkaisijan ja soluseinän paksuuden vaihtelu. Silva Fennica vol. 19 no. 1 article id 5228. https://doi.org/10.14214/sf.a15407
English title: Length, diameter and cell wall thickness of tracheids in mature lodgepole pine bole woodAbstract
Variation in tracheid morphology were examined for the bole wood of lodgepole pine (Pinus contorta Douglas ex Loudon) grown in Southern and Central Finland. Tracheid lengths were examined in a fast-grown and in slow-grown trees from three stands. Tracheid length increased with increasing height to 4–8 metres and decreased after that, and increased also with increasing age from the pith. The variation between stems was high. The shortest tracheids were about 1.11 mm near the piths and the longest about 4.10 mm near the bark.
Tracheid diameter and cell wall thickness were measured for the total number of 16 stems from Southern and Central Finland. Tracheid diameter increased with increasing distance from pith and the largest tracheids were at a height of 4–8 metres. Cell wall thickness varied independently of height in the stem. Summerwood cell wall thickness was twice that of springwood. There was a difference of 0.6 μm in springwood and 1.0 μm in summerwood double cell wall thickness between the two stands. Cell wall percentage was 29±4.7 in springwood and 69±7.3 in summerwood.
The PDF includes a summary in English.
Original keywords
puuaines;
kontortamänty;
trakeidit;
puuaineen rakenne
English keywords
wood properties;
lodgepole pine;
Pinus contorta;
wood anatomy;
tracheids
Published in 1985
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Available at https://doi.org/10.14214/sf.a15407 | Download PDF
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