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Maturation Rate of Tracheid Lengthening in Slow-Grown Young Sugi (Cryptomeria Japonica) Trees

Maturation Rate of Tracheid Lengthening in Slow-Grown Young Sugi (Cryptomeria Japonica) Trees Maturation rate, the rate of increase in tracheid length in juvenile wood, was examined in sugi (Cryptomeria japonica D. Don) saplings grown for five years under different shading conditions: 10%, 20% 40% and 100 % of relative illumination intensity. The lowest photointensity dramatically suppressed radial growth and slowed tracheid lengthening. Radial variation of tracheid length within the stem was associated with distance from the pith, rather than the number of annual rings from the pith. Furthermore, maturation rate was closely related to the rate of the radial growth, which changed proportionally with growth rate below a 2-3 mm ring width. A lower maturation rate of tracheid length is associated with a delay in the transition from juvenile to mature wood. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png IAWA Journal Brill

Maturation Rate of Tracheid Lengthening in Slow-Grown Young Sugi (Cryptomeria Japonica) Trees

IAWA Journal , Volume 14 (3): 6 – Jan 1, 1993

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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0928-1541
eISSN
2294-1932
DOI
10.1163/22941932-90001330
Publisher site
See Article on Publisher Site

Abstract

Maturation rate, the rate of increase in tracheid length in juvenile wood, was examined in sugi (Cryptomeria japonica D. Don) saplings grown for five years under different shading conditions: 10%, 20% 40% and 100 % of relative illumination intensity. The lowest photointensity dramatically suppressed radial growth and slowed tracheid lengthening. Radial variation of tracheid length within the stem was associated with distance from the pith, rather than the number of annual rings from the pith. Furthermore, maturation rate was closely related to the rate of the radial growth, which changed proportionally with growth rate below a 2-3 mm ring width. A lower maturation rate of tracheid length is associated with a delay in the transition from juvenile to mature wood.

Journal

IAWA JournalBrill

Published: Jan 1, 1993

Keywords: Cryptomeria japonica ; juvenile wood; maturation rate of tracheid lengthening; shading conditions; rate of radial growth

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