Abstract
Various guanidine compounds were detected in 1-year-old stems and developing shoots of fruit trees such as citrus, apple, peach, loquat and persimmon. GSA, CT, GAA, AARG, GPA, GBA, ARG, GBAD, G and MG were identified and quantified. CTN, HARG and AGM were not identified. More than 20 species of unidentified guanidine compounds were present in all samples. Seasonal variations of GBAD, GBA, GAA, AARG, CT and G in the bark and wood of 2-year-old stem, buds and burst buds, and in 1-year-old leaves parallelled those of arginine. These results suggest that the metabolic pathway of ARG via GBAD, GBA, GABA to the TCA cycle operates in fruit trees, and also that different metabolic route for guanidine compounds connected to arginine metabolism operates.
