Fractionation of Metal Stable Isotopes by Higher Plants

被引：66

作者：

von Blanckenburg, Friedhelm ^{[1
]}

von Wiren, Nicolaus ^{[2
]}

Guelke, Monica ^{[3
]}

Weiss, Dominik J. ^{[4
,5
]}

Bullen, Thomas D. ^{[6
]}

机构：

[1] German Res Ctr Geosci GFZ, D-14473 Potsdam, Germany

[2] Leibniz Inst Pflanzengenet & Kulturpflanzenforsch, D-106466 Gatersleben, Germany

[3] Leibniz Univ Hannover, Inst Mineral, D-30167 Hannover, Germany

[4] Univ London Imperial Coll Sci Technol & Med, London SW7 5PD, England

[5] Nat Hist Museum, London SW7 5PD, England

[6] US Geol Survey, Menlo Pk, CA 94025 USA

来源：

ELEMENTS | 2009年 / 5卷 / 06期

关键词：

higher plants; nutrition sciences; isotope fractionation; IRON; ZINC; SOIL; PHYTOSIDEROPHORES; NICOTIANAMINE; TRANSPORT; SYSTEM; ROOTS;

D O I：

10.2113/gselements.5.6.375

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Higher plants induce chemical reactions in the rhizosphere, facilitating metal uptake by roots. Fractionation of the isotopes in nutrients such as calcium, Iron, magnesium, and zinc produces a stable Isotope composition in the plants that generally differs from that of the growth medium. Isotope fractionation also occurs during transport of the metals within most plants, but its extent depends on plant species and on the metal, in particular, on the metal's redox state and what ligand it is bound to. The metal stable isotope variations observed in plants create an isotope signature of life at the Earth's surface, contributing substantially to our understanding of metal cycling processes in the environment and in individual organisms.

引用

页码：375 / 380

页数：6

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