不同蒴齿类型藓类植物的FTIR光谱分析及系统学意义初探  

FTIR Spectroscopy Analysis of Mosses with Different Kinds of Peristomes and Its Systematic Significance

作　　者：徐晟翀[1] 曹同[1] 聂明[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《光谱学与光谱分析》2007年第9期1710-1714,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(30370111);上海高校科学发展重点基金项目(02D247)资助

摘　　要：采用傅里叶变换红外光谱技术（FTIR）研究了分属不同蒴齿类型的23种藓类植物的红外光谱。通过比较光谱特征典型的5个代表藓种间红外光谱图的差异,确定了1790-1330 cm^-1,1200-960 cm^-1,895-830 cm^-1和725-655 cm^-1四个光谱特征区间。23种藓类植物在该四个特征区间的光谱数据分析结果表明,基于二阶导数红外光谱结合分级聚类分析（hierarchical cluster analysis,HCA）和主成分分析法（principal component analysis,PCA）能很好地区分出五大藓类植物类型：泥炭藓类、线齿类、顶蒴单齿类、顶蒴双齿类、侧蒴双齿类,与以蒴齿结构作为最基本特征的传统藓纲分类系统相一致。因此,FTIR光谱结合多元分析方法可作为一种实用的工具运用于苔藓植物系统学研究中。The spectra of 23 species of mosses belonging to different kinds of peristomes were determined by Fourier transform infrared（FTIR） spectroscopy.Based on comparing the differences in the spectra of five representative species,four ranges of 1 790-1 330 cm^-1,1 200-960 cm^-1,895-830 cm^-1 and 725-655 cm^-1 were selected as the characteristic spectra for analysis.The results show that hierarchical cluster analysis（HCA） and principal components analysis（PCA） using the second derivatives FTIR spectra can effectively identify five kinds of mosses： Sphagnidae,Nematodontae,Acrocarpi-Haplolepideae,Acrocarpi-Diplolepideae,and Pleurocarpi-Diplolepideae,which are well suited for the known moss systems based on peristome structure.Therefore,FTIR spectra combined with chemometrics can be used as a useful tool in systematic research on bryophytes.

关 键 词：红外光谱 藓类 系统学 分级聚类分析 主成分分析 

分 类 号：O657.3[理学—分析化学]