Abstract
In a previous study, we fed 10-4 m of d-[1-14C]alanine to suspension-cultured rice cells, the growth stage of which corresponded to the latter half of the logarithmic phase (1). After feeding the radioactive d-isomer for 8 hr, a rather small amount of radioactivity was detected in the cells and medium. Most of the exogenous d-[1-14C]alanine thus appeared to be decomposed smoothly and the radioactive carbon derived from the decomposed compound should be excluded from the cells or medium. These results demonstrated that rice cells are able to metabolize d-alanine, and the cells are thus suitable materials for examining the metabolic system of d-alanine in higher plants.

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