Metabolism and Degradation of Nicotinic Acid in Parsley (Petroselinum hortense) Cell Suspension Cultures and Seedlings
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چکیده
Application o f [6 14C]or [7-14C]nicotinic acid to parsley cell suspension cultures led to the accumulation of labelled nicotinamide m ononucleotide, nicotinamide adenine dinucleotide, nicotinamide N-riboside, nicotinamide and nicotinic acid, indicating the operation of the pyridine nucleotide cycle in these cells. A s main conjugates, nicotinic acid N-glucoside and nicotinic acid glucose ester were found. For nicotinic acid degradation the following sequence is suggested: nicotinic acid —» 6 -hydroxynicotinic acid —» 2,5-dihydroxypyridine —> a C4/C3 unit o f unknown structure —» C 0 2. In aseptically grown parsley seedlings nicotinic acid is also degraded to C 0 2
منابع مشابه
Enzymatic Studies on the Reversible Synthesis of Nicotinic Acid-N-glucoside in Heterotrophic Parsley Cell Suspension Cultures
Barbara Upmeier, Jürgen E. Thomzik*, and Wolfgang Barz Lehrstuhl für Biochemie der Pflanzen, Westfälische Wilhelms-Universität Münster, Hindenburgplatz 55, D-4400 Münster, Bundesrepublik Deutschland Z. Naturforsch. 43c, 835 -842 (1988); received August 1/September 30, 1988 Petroselinum hortense, Umbelliferae, Plant Cell Cultures, Nicotinic Acid, Nicotinic Acid-Nglucoside A soluble enzyme cataly...
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