Detrended Correspondence Analysis of Phenetic Relationships of Bryophytes Based on FTIR Spectra
GUO Shui-liang1, 2, CAO Tong2，CHENG Cun-gui1
1. College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004，China 2. College of Life and Environmental Sciences, Shanghai Teachers' University, Shanghai 200234，China
Abstract：Bryophytes are important high plants. However, the plants of bryophyte are small in size with few identification characters. The identification of plant samples using Fourier transform infrared spectrometer with OMNI collector is simple, convenient，fast and accurate. In the present paper, Fourrier transform infrared spectrometer with OMNI collector was applied to gain the infrared spectra of 30 samples belonging to 26 bryophyte species. Based on the indices of wave number-absorbance, the differences of the 30 infrared spectra were compared by the method of Detrended Correspondence Analysis (DCA). The results showed that there is good correspondence between the position relationship of DCA two-dimensional plot of the samples based on the indices of wave number-absorbance of FTIR spectra and their classification relationship. Therefore, it is practical to apply the infrared spectra to identifying the false sample from the true one in medicine bryophytes.
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