Changes in the cellulose crystallinity of moso bamboo cell walls during the growth process by X-ray diffraction techniques

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• 作者：Keisuke Toba ; Takahisa Nakai ; Tatsuya Shirai ; Hiroyuki Yamamoto
• 关键词：Bamboo shoot ; Maturation ; Crystallization ; Internodal growth ; Microfibrils
• 刊名：Journal of Wood Science
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：61
• 期：5
• 页码：517-524
• 全文大小：1,249 KB
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• 作者单位：Keisuke Toba (1)
  Takahisa Nakai (2)
  Tatsuya Shirai (3)
  Hiroyuki Yamamoto (3)
  
  1. Gifu University Composite Materials Center, Gifu University, Gifu, 501-1193, Japan
  2. Interdisciplinary Graduate School of Science and Engineering, Shimane University, Matsue, 690-8504, Japan
  3. Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, 464-8601, Japan
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Wood Science and Technology
  Materials Science
  Characterization and Evaluation Materials
  
• 出版者：Springer Japan
• ISSN：1611-4663

文摘

We investigated the changes in cellulose crystallinity in the cell walls of moso bamboo (Phyllostachys pubescens Mazel) during the growth process. Changes in crystallinity in bamboo cell walls were traced along the longitudinal and radial directions using flat-sawn specimens obtained from each internode using X-ray diffraction measurements. Cellulose crystallinity in cell walls in the same culm was higher around the base of the bamboo culms in less than 10 days after the emergence of bamboo shoots, while the upper internodes remained lower in crystallinity. Thereafter, crystallinity in the upper internodes of bamboo culms became higher. This suggests that cellulose crystallinity within bamboo cell walls has gradually increased from the base to the top with the elongation of the internode during the growth process of bamboo shoots. In addition, cellulose crystallinity in cell walls increased particularly in the outer part of the bamboo culms in all internodes. Moreover, increases of crystallinity occurred after elongation growth of internodes. It is considered that increases in crystallinity in the outer portion of each internode are one of the countermeasures of bamboo culms against increased bending moment due to the elongation growth. Keywords Bamboo shoot Maturation Crystallization Internodal growth Microfibrils