Positive effects of salicylic acid pretreatment on the composition of flax plastidial membrane lipids under cadmium stress
| Autor: | Antonio De Haro, Wided Chaïbi, Wahbi Djebali, Aïcha Belkadhi, Sara Obregón |
|---|---|
| Přispěvatelé: | Ministère de l’Enseignement Supérieur et de la Recherche Scientifique (Tunisie) |
| Rok vydání: | 2014 |
| Předmět: |
Leaves
Linum Linolenic acid Health Toxicology and Mutagenesis Linoleic acid Membrane lipids Phospholipid Linum usitatissimum L chemistry.chemical_compound Cadmium Chloride Flax Soil Pollutants Environmental Chemistry Plastids Fatty acids Phospholipids chemistry.chemical_classification biology Galactolipids Salicylic acid General Medicine Phosphatidic acid biology.organism_classification Pollution Plant Leaves Biodegradation Environmental Absorption Physicochemical chemistry Biochemistry lipids (amino acids peptides and proteins) Cadmium Polyunsaturated fatty acid |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-014-3475-6 |
| Popis: | Interest in use of flax (Linum usitatissimum L.) as cadmium (Cd)-accumulating plant for phytoextraction of contaminated soils opened up a new and promising avenue toward improving tolerance of its varieties and cultivars to Cd stress. The aim of this study is to get insights into the mechanisms of Cd detoxification in cell membranes, by exploring the effects of salicylic acid (SA)-induced priming on fatty acids and lipid composition of flax plantlets, grown for 10 days with 50 and 100 μM Cd. At leaf level, levels of monogalactosyldiacylglycerol (MGDG), phosphatidylcholine (PC), phosphatidylglycerol (PG), and neutral lipids (NL) have shifted significantly in flax plantlets exposed to toxic CdCl2 concentrations, as compared to that of the control. At 100 μM Cd, the linoleic acid (C18:2) decreases mainly in digalactosyldiacylglycerol (DGDG) and all phospholipid species, while linolenic acid (C18:3) declines mostly in MGDG and NL. Conversely, at the highest concentration of the metal, SA significantly enhances the levels of MGDG, PG and phosphatidic acid (PA), and polyunsaturated fatty acids mainly C18:2 and C18:3. Furthermore, SA pretreatment seems to reduce the Cd-induced alterations in both plastidial and extraplastidial lipid classes, but preferentially preserves the plastidial lipids by acquiring higher levels of polyunsaturated fatty acids. These results suggest that flax plantlets pretreated with SA exhibits more stability of their membranes under Cd-stress conditions. This research was supported by the Ministry of Higher Education, Scientific Research and Technology in Tunisia |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink