Variation of indole acetic acid (IAA) amounts in cambial-region tissues in 7- and 24-year-old sugi (Cryptomeria japonica) trees

Yoshio Kijidani, Naoki Ohshiro, Daisuke Iwata, Masanori Nagamine, Taiga Nishiyama, Junji Matsumura, Shinya Koga

研究成果: ジャーナルへの寄稿学術誌査読

5 被引用数 (Scopus)

抄録

Recently, breeding programs have attempted to produce high growth rates for shorter rotation cycles in plantation trees. In these trees, the ratio of juvenile wood increases; thus, the juvenile wood properties should be improved for structural use. To this end, it is important to understand the influences on juvenile wood properties precisely. In this study, we report on the indole acetic acid (IAA) amounts of juvenile sugi (Cryptomeria japonica) trees in September and compare the IAA amounts to those in mature trees. The IAA amounts at the lower trunks in juvenile trees were significantly larger than those in mature trees and the IAA amounts decreased with tree height. In each stand, except a mature tree stand, there is no significant effect of IAA amounts on latewood width and MFA. However, put together all samples, the latewood width and MFA increased with IAA amounts in samples with IAA <200 ng/cm2. The samples at lower trunk in juvenile trees had significantly larger IAA amounts, larger MFA and larger latewood width than the samples in mature trees (p < 0.01). The very large IAA amounts may have a certain relation with juvenile wood properties.

本文言語英語
ページ(範囲)177-185
ページ数9
ジャーナルJournal of Wood Science
60
3
DOI
出版ステータス出版済み - 6月 2014

!!!All Science Journal Classification (ASJC) codes

  • 生体材料

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