CHEMICAL CONSTITUENT DISTRIBUTION WITHIN MULTILAYERED CELL WALLS OF MOSO BAMBOO FIBER TESTED BY CONFOCAL RAMAN MICROSCOPY

Authors

  • Penglian Wei International Centre for Bamboo and Rattan
  • Jiangfeng Ma International Centre for Bamboo and Rattan
  • Zehui Jiang International Centre for Bamboo and Rattan
  • Rong Liu International Centre for Bamboo and Rattan
  • Xin An International Centre for Bamboo and Rattan
  • Benhua Fei International Centre for Bamboo and Rattan

Keywords:

Phyllostachys pubescens, confocal Raman microscopy, Raman imaging, chemical constituent distribution, cell wall.

Abstract

The distribution of cellulose and lignin is key to its physical and mechanical properties of woody materials. This study was carried out to investigate chemical constituent distributrion distribution of Moso bamboo (Phyllostachys pubescens) fiber using confocal Raman microscopy (CRM) with a particular focus on its unique multilayered structure. The results showed that syringyl and guaiacyl units of lignin were widely distributed across the whole cell wall, including the cell corner (CC) and compound middle lamella (CML), whereas p-hydroxyphenyl units were mainly located in CC and CML regions. A series of CRM images of Bbamboo fibewr cell walls confirmed that different concentration of specific chemicals were present in the multilayered structure. Lignin concentration did not always declined from the periphery to the central part but sometimes increased close to lumen edges as well as some layers. Furthermore,  variation of lignin and cellulose concentration across cell wall could be obtained by using the line scanning function. Distribution difference of lignin and cellulose was generally located in CML and lumen side as well as some borders between two adjacent secondary layers. The results from this study will deepen the understanding of the organization of Moso bamboo cell walls.

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Published

2017-01-26

Issue

Vol. 49 No. 1 (2017)

Section

Research Contributions

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