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。
关键词：人工林尾巨桉;正常木;生长应力;细胞壁;木质素含量
Abstract：By virtue of FE-SEM and EDXA marked by Br element, the relationship between the lignin distribution and growth stress 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 lignin content (from high level to low level) in sequence was cell corner, compound middle lamellae, S1, S2 and S3; The lignin contents in micro-morphological regions of wood fiber cell wall were decreased with the increase in growth stress and lignification process was delayed.
刘晓丽1,2，殷亚方2*，姜笑梅2，边明明2 . SEM-EDXA分析不同生长应力木材细胞壁微区木质素沉积[J]. 光谱学与光谱分析, 2011, 31(12): 3358-3361.
LIU Xiao-li1,2, YIN Ya-fang2*, JIANG Xiao-mei2, BIAN Ming-ming2 . Microanalysis Study on Lignin Distribution of Wood with Different Growth Stress Level by SEM-EDXA . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(12): 3358-3361.
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