文献类型：期刊文献

中文题名：SEM-EDXA分析不同生长应力木材细胞壁微区木质素沉积

英文题名：Microanalysis Study on Lignin Distribution of Wood with Different Growth Stress Level by SEM-EDXA

作者：刘晓丽[1,2] 殷亚方[2] 姜笑梅[2] 边明明[2]

第一作者：刘晓丽

通信作者：Yin, YF[1]

机构：[1]北京自然博物馆;[2]中国林业科学研究院木材工业研究所

年份：2011

卷号：31

期号：12

起止页码：3358-3361

中文期刊名：光谱学与光谱分析

外文期刊名：Spectroscopy and Spectral Analysis

收录：CSTPCD;;EI(收录号：20115014598221);Scopus(收录号：2-s2.0-83055179860);WOS:【SCI-EXPANDED(收录号:WOS:000297899400042)】；北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；PubMed;

基金：国家自然科学基金项目(30300270;30972303)资助

语种：中文

中文关键词：人工林尾巨桉;正常木;生长应力;细胞壁;木质素含量

外文关键词：Plantation Eucalyptus urophylla×E.gra ndis; Normal wood; Growth stress; Cell wall; Lignin content

分类号：S795

摘要：选取具不同生长应力水平的人工林尾巨桉(Eucalyptus urophylla×E.grandis)正常木为研究对象,借助场发射环境扫描电子显微镜系统,结合以溴元素做标记的X射线能谱分析技术,分析了尾巨桉细胞壁微区木质素沉积与生长应力的关系。研究结果表明,木纤维细胞壁各微区间木质素含量的大小关系与生长应力高低无关,其含量顺序为细胞角隅>复合胞间层>次生壁(S1>S2>S3);而随着生长应力增大,木纤维细胞壁各微区木质素含量均下降,木质化进程减慢。
By virtue of FE-SEM and EDXA marked by Br element,the relationship between the lignin distribution and growthstress was micro-analyzed by normal wood of plantation Eucalyptus urophylla×E.grandis with different growth stress levels.The results indicated that the lignin contents of different cell wall layers were not related to the growth stress level,and the lig-nin content（from high level to low level）in sequence was cell corner,compound middle lamellae,S1,S2and S3;The lignin con-tents in micro-morphological regions of wood fiber cell wall were decreased with the increase in growth stress and lignificationprocess was delayed.