[Transport and metabolism of 2-[(14)C]abscisic acid in root segments of Phaseolus coccineus L].
Movement of 2-[(14)C]ABA through 1.5 cm and 5 cm long root segments of P. coccineus L. was acropetally polarised. The velocity of acropetal transport of [(14)C]ABA in 1.5 cm long segments was 4-5 mm·h(-1). Up to 11 h after the start of incubation [(14)C]ABA could be extracted unchanged. Beyond this time radioactivity became associated to an unidentified compound, which shows chromatographic qualities similar to those of Milborrow's "Metabolite C" (Biochemistry & Physiol. Plant Growth Substances, 1531, Runge Press Ottawa, 1968; and Chem. Comm. 966, 1969).
Botanisches Institut I, Botanische Anstalten der Universität, Mittlerer Dallenbergweg 64, D-8700, Würzburg, Federal Republic of Germany.
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