Langmuir monolayers of chloroplast membrane lipids

被引：10

作者：

Gzyl-Malcher, Barbara ^{[1
]}

Filek, Maria ^{[2
]}

Makyla, Katarzyna ^{[1
]}

机构：

[1] Jagiellonian Univ, Fac Chem, Dept Phys Chem & Electrochem, PL-30060 Krakow, Poland

[2] Pedag Acad, Inst Biol, Dept Genet & Cytol, PL-31054 Krakow, Poland

来源：

THIN SOLID FILMS | 2008年 / 516卷 / 24期

关键词：

Langmuir monolayer; Galactolipids; Chloroplast membrane; Plant stress;

D O I：

10.1016/j.tsf.2007.11.056

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work explores the interactions between chloroplast membrane lipids in model experiments. Chloroplast membrane is characterized by a high proportion of galactolipids: MGDG - monogalactosyldiacylglycerol and DGDG - digalactosyldiacylglycerol. Since cadmium is known to be one of the most toxic heavy metal causing plant stress appearing e.g. as a reduction in plant growth, its influence on MGDG/DGDG monolayers was examined. For that reason the surface pressure-mean molecular area isotherms of these galactolipids and their mixtures on pure water and water solution of cadmium chloride (CdCl2) were recorded. A classical thermodynamic analysis was performed on those isotherms, which involved calculating excess free energies of mixing to determine the miscibility properties. The strongest interactions between MGDG and DGDG are found at MGDG/DGDG stoichiometry corresponding to the composition of natural chloroplast membrane (MGDG:DGDG 2:1). Addition of CdCl2 unfavourably influences these interactions. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：8844 / 8847

页数：4

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