RRC ID 3118
Author Matsui A, Yin Y, Yamanaka K, Iwasaki M, Ashihara H.
Title Metabolic fate of nicotinamide in higher plants.
Journal Physiol Plant
Abstract 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.
Volume 131(2)
Pages 191-200
Published 2007-10-1
DOI 10.1111/j.1399-3054.2007.00959.x
PMID 18251891
MeSH Alkaloids / chemistry Alkaloids / metabolism Arabidopsis / metabolism Carbon Radioisotopes Lotus / metabolism Molecular Structure Niacin / chemistry Niacin / metabolism Niacinamide / chemistry Niacinamide / metabolism* Oryza / metabolism Plant Leaves / metabolism Plant Roots / metabolism Plants / metabolism* Pyridines / chemistry Pyridines / metabolism Seeds / metabolism
IF 4.148
Times Cited 41
Arabidopsis / Cultured plant cells, genes rpc00001 rpc00008 rpc00020 rpc00032 rpc00034 sja05800
Lotus / Glycine