SEM-EDXA分析不同生长应力木材细胞壁微区木质素沉积  

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] 

机构地区：[1]北京自然博物馆,北京100050 [2]中国林业科学研究院木材工业研究所,北京100091

出　　处：《光谱学与光谱分析》2011年第12期3358-3361,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(30300270;30972303)资助

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.

关 键 词：人工林尾巨桉 正常木 生长应力 细胞壁 木质素含量 

分 类 号：S795[农业科学—林木遗传育种]