Article | 04. 2016 Vol. 34, Issue. 2
Establishment of discrimination system using multivariate analysis of FT-IR spectroscopy data from different species of artichoke (Cynara cardunculus var. scolymus L.)

Agricultural Research Institute for Climate Change, NIHHS, RDA1

2016.04. 324:330


To determine whether FT-IR spectral analysis based on multivariate analysis for whole cell extracts can be used to discriminate between artichoke (Cynara cardunculus var. scolymus L.) plants at the metabolic level, leaves of ten artichoke plants were subjected to Fourier transform infrared(FT-IR) spectroscopy. FT-IR spectral data from leaves were analyzed by principal component analysis (PCA), partial least square discriminant analysis (PLS-DA) and hierarchical clustering analysis (HCA). FT-IR spectra confirmed typical spectral differences between the frequency regions of 1,700-1,500, 1,500-1,300 and 1,100-950 cm-1, respectively. These spectral regions reflect the quantitative and qualitative variations of amide I, II from amino acids and proteins (1,700-1,500 cm-1), phosphodiester groups from nucleic acid and phospholipid (1,500-1,300 cm-1) and carbohydrate compounds (1,100-950 cm-1). PCA revealed separate clusters that corresponded to their species relationship. Thus, PCA could be used to distinguish between artichoke species with different metabolite contents. PLS-DA showed similar species classification of artichoke. Furthermore these metabolic discrimination systems could be used for the rapid selection and classification of useful artichoke cultivars.

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