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Publication Type J
Authors Ashihara, H; Yin, YL; Deng, WW; Watanabe, S
Author Full Name Ashihara, Hiroshi; Yin, Yuling; Deng, Wei-Wei; Watanabe, Shin
Title Pyridine salvage and nicotinic acid conjugate synthesis in leaves of mangrove species
Source PHYTOCHEMISTRY
Language English
Document Type Article
Author Keywords Avicennia marina; Acanthaceae; Bruguiera gymnorrhiza; Kandelia obovata; Rhizophoraceae; Lumnitzera racemosa; Combretaceae; Pemphis acidula; Lythraceae; Rhizophora stylosa; Sonneratia alba; Sonneratiaceae; Biosynthesis; NAD; Nicotinamide; Nicotinic acid N-glucoside; Mangrove; Trigonelline
Keywords Plus CELL-SUSPENSION CULTURES; SALT STRESS; TRIGONELLINE ACCUMULATION; NUCLEOTIDE CYCLE; BRUGUIERA-SEXANGULA; COMPATIBLE SOLUTES; AVICENNIA-MARINA; COFFEA-ARABICA; INORGANIC-IONS; METABOLISM
Abstract The metabolic fate of [carbonyl-(14)C]nicotinamide was surveyed in leaf disks of seven mangrove species, Bruguiera gymnorrhiza, Rhizophora stylosa, Kandelia obovata, Sonneratia alba, Pemphis acidula, Lumnitzera racemosa and Avicennia marina, with and without 250 mM NaCl. Uptake of [(14)C]nicotinamide by leaf disks was stimulated by 250 mM NaCl in K. candel, R. stylosa, A. marina and L. racemosa. [Carbonyl-(14)C]nicotinamide was converted to nicotinic acid and was utilised for the synthesis of nucleotides and nicotinic acid conjugates. Formation of nicotinic acid by the deaminase reaction was rapid: there was little accumulation of nicotinamide in the disks 3 h after administration. Radioactivity from [carbonyl-(14)C]nicotinamide was incorporated into pyridine nucleotides (mainly NAD and NADP) in all mangrove leaves, and the rates varied from 2% (in L. racemosa) to 15% (S. alba) of the total radioactivity taken up. NaCl generally reduced nicotinic acid salvage for NAD and NADP. In all mangrove leaf disks, the most heavily labelled compounds (up to 70% of total radioactivity) were trigonelline (N-methylnicotinic acid) and/or nicotinic acid N-glucoside. Trigonelline was formed in all mangrove plants, but N-glucoside synthesis was found only in leaves of A. marina and K. obovata. In A. marina, incorporation of radioactivity into N-glucoside (51%) was much greater than incorporation into trigonelline (2%). In general, NaCl stimulates the synthesis of these pyridine conjugates. The rate of decarboxylation of nicotinic acid in roots of A. marina seedlings was much greater than for the corresponding reaction observed in leaves. (C) 2009 Elsevier Ltd. All rights reserved.
Author Address [Ashihara, Hiroshi; Yin, Yuling; Deng, Wei-Wei] Ochanomizu Univ, Grad Sch Humanities & Sci, Dept Biol Sci, Bunkyo Ku, Tokyo 1128610, Japan; [Watanabe, Shin] Univ Ryukyus, Trop Biosphere Res Ctr, Iriomote Stn, Taketomi, Okinawa 9071541, Japan
Reprint Address Ashihara, H (reprint author), Ochanomizu Univ, Grad Sch Humanities & Sci, Dept Biol Sci, Bunkyo Ku, 2-1-1 Otsuka, Tokyo 1128610, Japan.
E-mail Address ashihara.hiroshi@ocha.ac.jp
Funding Agency and Grant Number University of the Ryukyus
Funding Text This work was supported partly by grants from the cooperative research program of the Tropical Biosphere Research Center of the University of the Ryukyus.
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Cited Reference Count 34
Times Cited 9
Total Times Cited Count (WoS, BCI, and CSCD) 9
Publisher PERGAMON-ELSEVIER SCIENCE LTD
Publisher City OXFORD
Publisher Address THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
ISSN 0031-9422
29-Character Source Abbreviation PHYTOCHEMISTRY
ISO Source Abbreviation Phytochemistry
Publication Date JAN
Year Published 2010
Volume 71
Issue 1
Beginning Page 47
Ending Page 53
Digital Object Identifier (DOI) 10.1016/j.phytochem.2009.09.033
Page Count 7
Web of Science Category Biochemistry & Molecular Biology; Plant Sciences
Subject Category Biochemistry & Molecular Biology; Plant Sciences
Document Delivery Number 553NM
Unique Article Identifier WOS:000274374100006
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