Aromatische Aminos�uren im Stoffwechsel h�herer Pflanzen

p‐Hydroxybenzoate synthase: A complex associated with mitochondrial membranes of roots of Cucumis sativus

“…In vivo-experiments with various plants, cf. [2] have shown that p-coumaric acid is the immediate precursor of p-hydroxybenzoic acid. In addition, we have been able to demonstrate in vitro the conversion ofp-coumaric acid to p-hydroxybenzoic acid utilizing glyoxysomes [3] and glyoxysomal membranes [4].…”

The Shikimate Pathway in Higher Plants: Phenylpropanoid Compounds and their Derivatives

“…A detailed study by Neish and his associates 45 in which /7-coumaric (9), caffeic (12), ferulic (13) and sinapic (14) acids, all 14 C labelled in the jS-position of the side chain, were administered to shoots of both monocotyledenous and dicotyledenous plants led in each case to the formation of the corresponding hydroxy-or hydroxymethoxy-substituted benzoic acids in which the major proportion of the radioactivity was located in the carboxyl function. The validity of this biosyn thetic pathway was demonstrated 100 Evidence has also been obtained in higher plants 45,218 ' 226 for the operation of alternative pathways of biosynthesis for the forma tion of some of the substituted benzoic acids (93, 95, 97, 98 and 99) in which the required hydroxylation or methylation occurs at the stage of a C 6 . C x substrate (Figure 5.9).…”

Biodegradation of aromatic carboxylic acids by Pseudomonas mira

“…The shortening of the side chain of cinnamic acids by elimination of the acetic acid molecule (so-called /3-oxidation of cinnamic acids) was described by Kindl [8] and the corresponding enzyme responsible for this reaction had been characterized by Toms and Wood [9] when studying bioconversion of ferulic acid by Pseudomonas acidovorans. The shortening mechanism of the side chain of cinnamic acids was defined only recently by Hilton and Cain [10].…”