An Approach to Plant Identification Technology: Development of Lignin Pyrolysis Gas Chromatography and Pattern Recognition

We discovered a technique to extract a characteristic spectrum pattern from Lignin pyrolysis gas chromatography. The Lignin is a kind of methoxyphenol polymer that is often found among cell walls of plants. Using the spectrum, we can determine the species from fragments of 1 mg samples. The technique is useful for criminal investigation. The determination of species depends on distances calculated by species and a database of the spectra. We use the distances and can calculate family-locations in Plantae. The location shows the evolution/end of families. We evaluated 88 kinds of plants and discussed the end of ginkgo family and the branch of monocotyledon and a relation between C3/C4 metabolisms of Gramineae (family of the rice)