title: [FTIR study of the influence of leaf senescence on magnoliaceae cluster analysis].
abstract: Fourier transform infrared (FTIR) spectroscopy combined with hierarchical cluster analysis was used to study the influence of leaf senescence on magnoliaceae cluster. FTIR spectra of young, mature and old yellow leaves were obtained from 14 species trees belonging to the three magnoliaceae subtribes. Results showed that the infrared spectra of the three subtribes plant leaves were similar, only with minor differences in the absorption intensity of several peaks. Hierarchical cluster analysis was performed on the second derivative infrared spectra in the range 1800-700 cm(-1). The HCA results showed that the cluster based on mature leaves is better than that based on young and old yellow leaves. Our study suggests that it should be cautious to select leaf sample while using leaf spectra for classification.
authors.affiliation: School of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China. liyilun@sohu.com
authors.forename: Lun
authors.initials: L
authors.lastname: Li
authors.affiliation: School of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Liu
authors.affiliation: School of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
authors.forename: Quan-hong
authors.initials: QH
authors.lastname: Ou
authors.affiliation: School of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming 650092, China.
authors.forename: Jian-hong
authors.initials: JH
authors.lastname: Liu
authors.affiliation: Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming 650092, China.
authors.forename: Shi-zhong
authors.initials: SZ
authors.lastname: Sun
mesh_terms: D016000:Cluster Analysis; D029562:Magnoliaceae; D018515:Plant Leaves; D017550:Spectroscopy, Fourier Transform Infrared