Metabolic fate of nicotinamide in higher plants

Metabolism of [carbonyl-¹⁴C]nicotinamide was surveyed in various plant materials including the model plants, Arabidopsis thaliana, Oryza sativa and Lotus japonicus. In all plants studied, nicotinamide was used for the pyridine (nicotinamide adenine) nucleotide synthesis, probably after conversion to...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physiologia plantarum 2007-10, Vol.131 (2), p.191-200
Hauptverfasser: Matsui, Ayu, Yin, Yuling, Yamanaka, Keiko, Iwasaki, Midori, Ashihara, Hiroshi
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Metabolism of [carbonyl-¹⁴C]nicotinamide was surveyed in various plant materials including the model plants, Arabidopsis thaliana, Oryza sativa and Lotus japonicus. In all plants studied, nicotinamide was used for the pyridine (nicotinamide adenine) nucleotide synthesis, probably after conversion to nicotinic acid. Radioactivity from [carbonyl-¹⁴C]nicotinamide was incorporated into trigonelline (1-N-methylnicotinic acid) and/or into nicotinic acid 1N-glucoside (Na-Glc). Trigonelline is formed mainly in leaves and cell cultures of O. sativa and L. japonicus and in seedlings of Trifolium incarnatum, Medicago sativa and Raphanus sativus. Trigonelline synthesis from nicotinamide is generally greater in leaves than in roots. Na-Glc was formed as the major nicotinic acid conjugate in A. thaliana and in tobacco Bright Yellow-2 cells. In seedlings of Chrysanthemum coronarium and Theobroma cacao, both trigonelline and Na-Glc were synthesized from [carbonyl-¹⁴C]nicotinamide. Trigonelline is accumulated in some seeds, mainly Leguminosae species. The pattern of formation of the nicotinic acid conjugates differs between species and organs.
ISSN:0031-9317
1399-3054
DOI:10.1111/j.1399-3054.2007.00959.x