文献类型：期刊文献

中文题名：Cellulose structure and lignin distribution in normal and compression wood of the Maidenhair tree(Ginkgo biloba L.)

英文题名：Cellulose structure and lignin distribution in normal and compression wood of the Maidenhair tree(Ginkgo biloba L.)

作者：Seppo Andersson[1] Yurong Wang[2] Raili P?nni[3] Tuomas H?nninen[4] Marko Mononen[1] Haiqing Ren[2] Ritva Serimaa[1] Pekka Saranp??[5]

第一作者：Seppo Andersson

机构：[1]Department of Physics,University of Helsinki;[2]Research Institute of Wood Industry,Chinese Academy of Forestry;[3]Department of Forest Products Technology,Aalto University,School of Chemical Technology;[4]VTT Technical Research Centre of Finland;[5]Natural Resources Institute Finland

年份：2015

卷号：0

期号：4

起止页码：388-395

中文期刊名：植物学报：英文版

收录：CSTPCD;;Scopus;CSCD:【CSCD2015_2016】；PubMed;

基金：the National Natural Science Foundation (31370562) for financial support

语种：英文

中文关键词：纤维素结构;压缩木材;木质素;银杏;平均宽度;微纤丝角;针叶树木;X射线衍射

外文关键词：Cellulose structure； cell wall； compression wood； lignin； Maidenhair tree； microfibril angle

分类号：S792.95;TQ352.1

摘要：We studied in detail the mean micro fibril angle and the width of cellulose crystals from the pith to the bark of a 15-year-old Maidenhair tree(Ginkgo biloba L.). The orientation of cellulose micro fibrils with respect to the cell axis and the width and length of cellulose crystallites were determined using Xray diffraction. Raman microscopy was used to compare the lignin distribution in the cell wall of normal/opposite and compression wood, which was found near the pith. Ginkgo biloba showed a relatively large mean micro fibril angle,varying between 19° and 39° in the S2 layer, and the average width of cellulose crystallites was 3.1–3.2 nm. Mild compression wood without any intercellular spaces or helical cavities was observed near the pith. Slit-like bordered pit openings and a heavily lignified S2 L layer con firmed the presence of compression wood. Ginkgo biloba showed typical features present in the juvenile wood of conifers. The micro fibril angle remained large over the 14 annual rings. The entire stem disc,with a diameter of 18 cm, was considered to consist of juvenile wood. The properties of juvenile and compression wood as well as the cellulose orientation and crystalline width indicate that the wood formation of G. biloba is similar to that of modern conifers.
We studied in detail the mean micro fibril angle and the width of cellulose crystals from the pith to the bark of a 15-year-old Maidenhair tree（Ginkgo biloba L.）. The orientation of cellulose micro fibrils with respect to the cell axis and the width and length of cellulose crystallites were determined using Xray diffraction. Raman microscopy was used to compare the lignin distribution in the cell wall of normal/opposite and compression wood, which was found near the pith. Ginkgo biloba showed a relatively large mean micro fibril angle,varying between 19° and 39° in the S2 layer, and the average width of cellulose crystallites was 3.1–3.2 nm. Mild compression wood without any intercellular spaces or helical cavities was observed near the pith. Slit-like bordered pit openings and a heavily lignified S2 L layer con firmed the presence of compression wood. Ginkgo biloba showed typical features present in the juvenile wood of conifers. The micro fibril angle remained large over the 14 annual rings. The entire stem disc,with a diameter of 18 cm, was considered to consist of juvenile wood. The properties of juvenile and compression wood as well as the cellulose orientation and crystalline width indicate that the wood formation of G. biloba is similar to that of modern conifers.