Nicotinamide metabolism in ferns: Formation of nicotinic acid glucoside

被引：9

作者：

Ashihara, Hiroshi ^{[1
]}

Yin, Yuling ^{[1
]}

Watanabe, Shin ^{[2
]}

机构：

[1] Ochanomizu Univ, Grad Sch Humanities & Sci, Dept Biol Sci, Tokyo 1128610, Japan

[2] Univ Ryukyus, Trop Biosphere Res Ctr, Iriomote Stn, Taketomi Cho, Okinawa 9071541, Japan

来源：

PLANT PHYSIOLOGY AND BIOCHEMISTRY | 2011年 / 49卷 / 03期

关键词：

Ferns; Nicotinamide; Nicotinic acid; Nicotinic acid glucoside; Pyridine nucleotide; Trigonelline; PYRIDINE-NUCLEOTIDE CYCLE; CELL-SUSPENSION CULTURES; COFFEA-ARABICA; N-GLUCOSIDE; PLANTS; BIOSYNTHESIS; TRIGONELLINE; STRESS;

D O I：

10.1016/j.plaphy.2010.12.008

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The metabolic fate of [carbonyl-(14)C]nicotinamide was investigated in 9 fern species, Psilotum nudum, Angiopteris evecta, Lygodium japonicum, Acrostichum aureum, Asplenium antiquum, Diplazium subsinuatum, Thelypteris acuminate, Blechnum orientate and Crytomium fortune. All fern species produce a large quantity of nicotinic acid glucoside from [(14)C]nicotinamide, but trigonelline formation is very low. Increases in the release of (14)CO(2) with incubation time was accompanied by decreases in [carboxyl-(14)C]nicotinic acid glucoside. There was slight stimulation of nicotinic acid glucoside formation by 250 mM NaCl in mature leaves of the mangrove fern, Acrostichum aureum, but it is unlikely that this compound acts as a compatible solute. Nicotinamide and nicotinic acid salvage for pyridine nucleotide synthesis was detected in all fern species, although this activity was always less than nicotinic acid glucoside synthesis. Predominant formation of nicotinic acid glucoside is characteristic of nicotinic acid metabolism in ferns. This reaction appears to act as a detoxication mechanism, removing excess nicotinic acid. (C) 2010 Elsevier Masson SAS. All rights reserved.

引用

页码：275 / 279

页数：5

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