Carbon dioxide concentrations are very high in developing oilseeds

被引：40

作者：

Goffman, FD ^{[1
]}

Ruckle, M ^{[1
]}

Ohlrogge, J ^{[1
]}

Shachar-Hill, Y ^{[1
]}

机构：

[1] Michigan State Univ, Dept Plant Biol, E Lansing, MI 48824 USA

来源：

PLANT PHYSIOLOGY AND BIOCHEMISTRY | 2004年 / 42卷 / 09期

关键词：

carbon dioxide; carbon economy; CO2; refixation; developing oilseeds; rapeseed; soybean;

D O I：

10.1016/j.plaphy.2004.07.003

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

A new method has been developed to rapidly determine the total inorganic carbon concentration (gaseous [CO2] + aqueous [CO2] + [HCO3-] + [CO32-]) in developing seeds. Seeds are rapidly dissected and homogenized in 1 N HCl in gas-tight vials. The headspace gas is then analyzed by infrared gas analysis. Developing rapeseed (Brassica napus L.) and soybean [Glycine max (L.) Merr.] seeds were analyzed and found to have up to 40 and 12 mM total inorganic carbon, respectively. These concentrations are ca. 600-2000-fold higher than in ambient air or values reported for leaves. Carbon dioxide concentrations in rapeseed peaked during the stage of maximum oil synthesis and declined as seeds matured. The consequences for seed metabolism, physiology and carbon economy are discussed. (C) 2004 Elsevier SAS. All rights reserved.

引用

页码：703 / 708

页数：6

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