Abstract
The authors succeeded in demonstrating accumulation of tyrosine and p-coumaric acid in three day-old roots of maize (Zea mays L.) fed with L-phenylalanine and einnamie acid. Phenylpyruvic acid applied under the same conditions gave rise to phenylalanine, indicating the presence of the corresponding transferase activity. Even simultaneous application of inhibitors of transaminase activity — hydroxylamine and isonicotinic acid hydrazide — did not result in the formation of p-hydroxyphenylpyruvic acid.
Abstract
V trojdňových koreňoch kukuriceZea mays L. sa po infiltrácii L-fonylalanínu a kyseliny škoricovej podarilo dokázat nahromadenie ich hydroxylačných produktov, t. j. tyrozínu a kyseliny p-kumárovej. Za rovnakých podmienok použitá kysclina fonylpyrohroznová viodla k vzniku fenylalaninu, čo poulmzuje na prítomnost príslušnej amínotransferázovoj aktivity. Ani súčasná aplikácia inhibítorov transaminačných reakcií — hydroxylamínu a hydrazidu kysoliny izonikotínovej —nemala za náslodok tvorbu kysoliny p-hydroxyfenylpyrohroznovej.
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Pšenáková, T., Kovács, P., Pšenák, M. et al. Hydroxylation reactions in roots of maize (Zea mays L.). Biol Plant 12, 98–104 (1970). https://doi.org/10.1007/BF02920856
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DOI: https://doi.org/10.1007/BF02920856