抄録
The presence and levels of trans- and cis-ribosylzeatin, trans- and cis-zeatin, N6-isopentenyladenosine, and 6-(3-methyl-2-butenylamino)-9-?A-D-glucopyranosylpurine were determined in the root, and the stem and leaf of young sweet-potato plants by mass spectrometry using deuterium- labeled standards. The 6-(3-methyl-2-butenylamino)-9-?A-D-glucopyranosylpurine level was found to be the highest in both the root, and the stem and leaf. trans-Ribosylzeatin was present at a high level in the root. The ratio of the trans- and cis-isomers of zeatin in the root, and in the stem and leaf were determined to be 10 and 2.4, respectively. The variation in the trans/cis ratios of both zeatin and ribosylzeatin may reflect the growth stage of the organ in the plant.
