Purification and partial characterization of two biologically active compounds from the inflorescence of Sauromatum guttatum Schott (Araceae)

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The active principle triggering the metabolic outburst of the appendices of certain arum lily species has been purified and partially characterized. Although in the past it has been thought of as a single factor ("calorigen"), both paper chromatography and DEAE-Sephadex ion exchange chromatography reveal that there are two compounds (calorigen I and II) with calorigen activity. These can act alone or together, but show no synergism. They are low-molecular compounds which appear to be common constituents of the inflorescence of Sauromatum guttatum Schott. Calorigen II is also present in the spadix of Arum maculatum L., Arum dioscoridis Sibth. & Sm., and Dracunculus vulgaris Schott. Calorigen I absorbs UV at 242, 267 and 278 nm, calorigen II at 229 and 295 nm. NO spectral changes are noted in alkaline environment, whereas at low pH-values there is a shift of the absorption peaks of both compounds towards longer wavelengths. Calorigen II displays a strong blue fluorescence and has a maximal emission at 410 nm when activated at 295 nm. The. possible mechanism of calorigen action is discussed.
日本植物生理学会の論文