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Rys M, Stachurska J, Rudolphi-Szydło E, Dziurka M, Waligórski P, Filek M, Janeczko A. Does deacclimation reverse the changes in structural/physicochemical properties of the chloroplast membranes that are induced by cold acclimation in oilseed rape? PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 214:108961. [PMID: 39067102 DOI: 10.1016/j.plaphy.2024.108961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Accepted: 07/22/2024] [Indexed: 07/30/2024]
Abstract
Winter crops acquire frost tolerance during the process of cold acclimation when plants are exposed to low but non-freezing temperatures that is connected to specific metabolic adjustments. Warm breaks during/after cold acclimation disturb the natural process of acclimation, thereby decreasing frost tolerance and can even result in a resumption of growth. This phenomenon is called deacclimation. In the last few years, studies that are devoted to deacclimation have become more important (due to climate changes) and necessary to be able to understand the mechanisms that occur during this phenomenon. In the acclimation of plants to low temperatures, the importance of plant membranes is indisputable; that is why the main aim of our studies was to answer the question of whether (and to what extent) deacclimation alters the physicochemical properties of the plant membranes. The studies were focused on chloroplast membranes from non-acclimated, cold-acclimated and deacclimated cultivars of winter oilseed rape. The analysis of the membranes (formed from chloroplast lipid fractions) using the Langmuir technique revealed that cold acclimation increased membrane fluidity (expressed as the Alim values), while deacclimation generally decreased the values that were induced by cold. Moreover, because the chloroplast membranes were penetrated by lipophilic molecules such as carotenoids or tocopherols, the relationships between the structure of the lipids and the content of these antioxidants in the chloroplast membranes during the process of the cold acclimation and deacclimation of oilseed rape are discussed.
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Affiliation(s)
- Magdalena Rys
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland.
| | - Julia Stachurska
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland
| | - Elżbieta Rudolphi-Szydło
- Institute of Biology and Earth Sciences, University of the National Education Commission, Podchorążych 2, 30-084, Krakow, Poland
| | - Michał Dziurka
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland
| | - Piotr Waligórski
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland
| | - Maria Filek
- Institute of Biology and Earth Sciences, University of the National Education Commission, Podchorążych 2, 30-084, Krakow, Poland
| | - Anna Janeczko
- The Franciszek Górski Institute of Plant Physiology Polish Academy of Sciences, Niezapominajek 21, 30-239, Kraków, Poland.
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Sadura I, Janeczko A. Brassinosteroids and the Tolerance of Cereals to Low and High Temperature Stress: Photosynthesis and the Physicochemical Properties of Cell Membranes. Int J Mol Sci 2021; 23:342. [PMID: 35008768 PMCID: PMC8745458 DOI: 10.3390/ijms23010342] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/17/2021] [Accepted: 12/27/2021] [Indexed: 12/12/2022] Open
Abstract
Cereals, which belong to the Poaceae family, are the most economically important group of plants. Among abiotic stresses, temperature stresses are a serious and at the same time unpredictable problem for plant production. Both frost (in the case of winter cereals) and high temperatures in summer (especially combined with a water deficit in the soil) can result in significant yield losses. Plants have developed various adaptive mechanisms that have enabled them to survive periods of extreme temperatures. The processes of acclimation to low and high temperatures are controlled, among others, by phytohormones. The current review is devoted to the role of brassinosteroids (BR) in cereal acclimation to temperature stress with special attention being paid to the impact of BR on photosynthesis and the membrane properties. In cereals, the exogenous application of BR increases frost tolerance (winter rye, winter wheat), tolerance to cold (maize) and tolerance to a high temperature (rice). Disturbances in BR biosynthesis and signaling are accompanied by a decrease in frost tolerance but unexpectedly an improvement of tolerance to high temperature (barley). BR exogenous treatment increases the efficiency of the photosynthetic light reactions under various temperature conditions (winter rye, barley, rice), but interestingly, BR mutants with disturbances in BR biosynthesis are also characterized by an increased efficiency of PSII (barley). BR regulate the sugar metabolism including an increase in the sugar content, which is of key importance for acclimation, especially to low temperatures (winter rye, barley, maize). BR either participate in the temperature-dependent regulation of fatty acid biosynthesis or control the processes that are responsible for the transport or incorporation of the fatty acids into the membranes, which influences membrane fluidity (and subsequently the tolerance to high/low temperatures) (barley). BR may be one of the players, along with gibberellins or ABA, in acquiring tolerance to temperature stress in cereals (particularly important for the acclimation of cereals to low temperature).
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Affiliation(s)
- Iwona Sadura
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239 Kraków, Poland
| | - Anna Janeczko
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239 Kraków, Poland
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Molecular Dynamics of Chloroplast Membranes Isolated from Wild-Type Barley and a Brassinosteroid-Deficient Mutant Acclimated to Low and High Temperatures. Biomolecules 2020; 11:biom11010027. [PMID: 33383794 PMCID: PMC7823496 DOI: 10.3390/biom11010027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/18/2020] [Accepted: 12/23/2020] [Indexed: 02/07/2023] Open
Abstract
Plants have developed various acclimation strategies in order to counteract the negative effects of abiotic stresses (including temperature stress), and biological membranes are important elements in these strategies. Brassinosteroids (BR) are plant steroid hormones that regulate plant growth and development and modulate their reaction against many environmental stresses including temperature stress, but their role in modifying the properties of the biological membrane is poorly known. In this paper, we characterise the molecular dynamics of chloroplast membranes that had been isolated from wild-type and a BR-deficient barley mutant that had been acclimated to low and high temperatures in order to enrich the knowledge about the role of BR as regulators of the dynamics of the photosynthetic membranes. The molecular dynamics of the membranes was investigated using electron paramagnetic resonance (EPR) spectroscopy in both a hydrophilic and hydrophobic area of the membranes. The content of BR was determined, and other important membrane components that affect their molecular dynamics such as chlorophylls, carotenoids and fatty acids in these membranes were also determined. The chloroplast membranes of the BR-mutant had a higher degree of rigidification than the membranes of the wild type. In the hydrophilic area, the most visible differences were observed in plants that had been grown at 20 °C, whereas in the hydrophobic core, they were visible at both 20 and 5 °C. There were no differences in the molecular dynamics of the studied membranes in the chloroplast membranes that had been isolated from plants that had been grown at 27 °C. The role of BR in regulating the molecular dynamics of the photosynthetic membranes will be discussed against the background of an analysis of the photosynthetic pigments and fatty acid composition in the chloroplasts.
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Beszterda M, Nogala‐Kałucka M. Current Research Developments on the Processing and Improvement of the Nutritional Quality of Rapeseed (
Brassica napus
L.). EUR J LIPID SCI TECH 2019. [DOI: 10.1002/ejlt.201800045] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Monika Beszterda
- Department of Biochemistry and Food AnalysisPoznan University of Life SciencesMazowiecka 4860‐623PoznanPoland
| | - Małgorzata Nogala‐Kałucka
- Department of Biochemistry and Food AnalysisPoznan University of Life SciencesMazowiecka 4860‐623PoznanPoland
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Vargas-Perez M, Sierra-García G, Olvera HL, Chavez-Montes A, Gonzalez-Horta A. Impact of Melittin on Microalgae Cell Wall: A Monolayer Study. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The cell wall of microalgae presents a formidable barrier necessary for survival in aquatic environments. Unfortunately, this barrier affects certain processes of interest in algal biotechnology such as oil extraction. Thus, assessing the impact of lytic peptides or enzymes on algal cell wall degradation is a critical first step to utilizing algal biomass more efficiently. Galactolipids are the main structural component of plant chloroplastic membranes and blue-green algae cell membranes. The predominant lipids in this class are monogalactosyl-diacylglycerol (MGDG) and digalactosyl-diacylglycerol (DGDG). Here using de Langmuir monolayer technique, we have demonstrated that melittin, a lytic peptide, has an intrinsic propensity to interact and perturb interfacial monolayers made of MGDG or DGDG that mimic microalgae cell wall.
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Affiliation(s)
- Magda Vargas-Perez
- Institute of Biotechnology, Faculty of Biological Sciences, Universidad Autonoma de Nuevo Leon, 66451 San Nicolas de los Garza, N.L. Mexico
| | - Gerardo Sierra-García
- Department of Chemistry, Faculty of Biological Sciences, Universidad Autonoma de Nuevo Leon, 66451 San Nicolas de los Garza, N.L. Mexico
| | - Hugo Luna Olvera
- Institute of Biotechnology, Faculty of Biological Sciences, Universidad Autonoma de Nuevo Leon, 66451 San Nicolas de los Garza, N.L. Mexico
| | - Abelardo Chavez-Montes
- Department of Chemistry, Faculty of Biological Sciences, Universidad Autonoma de Nuevo Leon, 66451 San Nicolas de los Garza, N.L. Mexico
| | - Azucena Gonzalez-Horta
- Laboratory of Genomic Science, Faculty of Biological Sciences, Universidad Autonoma de Nuevo Leon, 66451 San Nicolas de los Garza, N.L. Mexico
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Hoyo J, Guaus E, Torrent-Burgués J. Monogalactosyldiacylglycerol and digalactosyldiacylglycerol role, physical states, applications and biomimetic monolayer films. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2016; 39:39. [PMID: 27021656 DOI: 10.1140/epje/i2016-16039-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 02/16/2016] [Indexed: 06/05/2023]
Abstract
The relevance of biomimetic membranes using galactolipids has not been expressed in any extensive experimental study of these lipids. Thus, on the one hand, we present an in-depth article about the presence and role of monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG) in thylakoid membranes, their physical states and their applications. On the other hand, we use the Langmuir and Langmuir-Blodgett (LB) techniques to prepare biomimetic monolayers of saturated galactolipids MGDG, DGDG and MGDG:DGDG 2:1 mixture (MD)--biological ratio--. These monolayers are studied using surface pressure-area isotherms and their data are processed to enlighten their physical states and mixing behaviour. These monolayers, once transferred to a solid substrate at several surface pressures are topographically studied on mica using atomic force microscopy (AFM) and using cyclic voltammetry for studying the electrochemical behaviour of the monolayers once transferred to indium-tin oxide (ITO), which has good optical and electrical properties. Moreover, MD presents other differences in comparison with its pure components that are explained by the presence of different kinds of galactosyl headgroups that restrict the optimal orientation of the MGDG headgroups.
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Affiliation(s)
- Javier Hoyo
- Group of Molecular and Industrial Biotechnology, Dpt. Chemical Engineering, Universitat Politècnica de Catalunya, 08222 Terrassa, Barcelona, Spain.
| | - Ester Guaus
- Group of Molecular and Industrial Biotechnology, Dpt. Chemical Engineering, Universitat Politècnica de Catalunya, 08222 Terrassa, Barcelona, Spain
| | - Juan Torrent-Burgués
- Group of Molecular and Industrial Biotechnology, Dpt. Chemical Engineering, Universitat Politècnica de Catalunya, 08222 Terrassa, Barcelona, Spain
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Rudolphi-Skórska E, Filek M, Zembala M. α-Tocopherol/Gallic Acid Cooperation in the Protection of Galactolipids Against Ozone-Induced Oxidation. J Membr Biol 2015; 249:87-95. [PMID: 26498297 PMCID: PMC4851703 DOI: 10.1007/s00232-015-9851-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 09/28/2015] [Indexed: 11/26/2022]
Abstract
The protective ability of α-tocopherol (TOH) and gallic acid (GA) acting simultaneously at the moment of oxidizer application was evaluated by determination of galactolipid layers’ oxidation degree. Addition of GA resulted in a significant decrease of ozone-derived radicals shifting the threshold of lipid sensitivity by an amount approximately corresponding to the GA intake in bulk reaction with ozone. TOH presence in lipid layers results in a change of the role of GA which additionally may be involved in the reduction of tocopheroxyl radical formed during oxidation. This leads to a decrease in effectiveness of GA in diminishing the amount of ozone radicals. Such an effect was not observed for mixed layers containing galactolipid and pre-oxidized tocopherol where the ozone threshold level was associated with a stoichiometry of GA + O3 reaction. It was concluded that probably subsequent transformations of tocopheroxyl radical to less reactive forms prevent its reaction with GA the entire quantity of which is used for radicals scavenging. This result shows the role of time parameter in systems where substrates are engaged in various reactions taking place simultaneously. The inactivation of 1,1-diphenyl-2-picrylhydrazyl radical by studied antioxidants in homogeneous system confirmed observations made on the basis of lipid layer properties indicating their antagonistic action (at least at studied conditions). Formation of layers in post-oxidation situation did not depend whether tocopherol was oxidized during oxidation of lipid/tocopherol mixture or was introduced as pre-oxidized. This may be interpreted as indication that products of tocopherol oxidation may stabilize lipid layers.
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Affiliation(s)
- Elżbieta Rudolphi-Skórska
- Department of Biochemistry, Biophysics and Biotechnology, Institute of Biology, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
| | - Maria Filek
- Department of Biochemistry, Biophysics and Biotechnology, Institute of Biology, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
| | - Maria Zembala
- Department of Biochemistry, Biophysics and Biotechnology, Institute of Biology, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
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Broniatowski M, Flasiński M, Hąc-Wydro K. Antagonistic effects of α-tocopherol and ursolic acid on model bacterial membranes. BIOCHIMICA ET BIOPHYSICA ACTA 2015; 1848:2154-62. [PMID: 26003534 DOI: 10.1016/j.bbamem.2015.05.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 04/27/2015] [Accepted: 05/13/2015] [Indexed: 12/25/2022]
Abstract
α-tocopherol (Toc), the most active component of vitamin E can exert antagonistic effects disabling the therapy of cancers and bacterial infections. Such antagonisms were observed also between Toc and bioactive pentacyclic triterpenes (PT) exhibiting anticancer and antibacterial properties. Both Toc and PT are water-insoluble membrane active substances. Thus, our idea was to emulate their interactions with model Escherichia coli membranes. E. coli inner membranes were selected for the experiments because their lipid composition is quite simple and well characterized and the two main components are phosphatidylethanolamine and phosphatidylglycerol. As a model of E. coli membranes we applied Langmuir monolayers formed by the E. coli total extract of polar lipids (Etotal) as well as by the main lipid components: phosphatidylethanolamine (POPE) and phosphatidylglycerol (ECPG). The antagonistic effects of ursolic acid (Urs) and Toc were investigated with the application of ternary Langmuir monolayers formed by Urs, Toc and one of the phospholipids POPE or ECPG. Our studies indicated that the affinities of Urs and Toc towards the POPE molecule are comparable; whereas there are profound differences in the interactions of Urs and Toc with ECPG. Thus, the model experiments prove that in the case of E. coli membrane, the differences in the interactions between Urs and Toc with the anionic bacterial phosphatidylglycerol can be the key factor responsible for the antagonistic effects observed between PT and Toc in vivo.
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Affiliation(s)
- Marcin Broniatowski
- Department of Environmental Chemistry, Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 3, 30-387 Kraków, Poland.
| | - Michał Flasiński
- Department of Environmental Chemistry, Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 3, 30-387 Kraków, Poland
| | - Katarzyna Hąc-Wydro
- Department of Environmental Chemistry, Faculty of Chemistry, Jagiellonian University, ul. Gronostajowa 3, 30-387 Kraków, Poland
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9
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Sieprawska A, Kornaś A, Filek M. Involvement of Selenium in Protective Mechanisms of Plants under Environmental Stress Conditions – Review. ACTA ACUST UNITED AC 2015. [DOI: 10.1515/abcsb-2015-0014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIn recent years there has been growing interest in selenium (Se) as an important micronutrient not only for animals and humans but also for plants. In particular, its protective effect in plants exposed to stress conditions has been suggested. In spite of many studies, the mechanism of Se action is not fully understood. In this review, possible ways of interaction of Se with stress factors leading to optimal growth and development of plants are presented. As the majority of experiments have focused on the effects of Se application under stress conditions induced by heavy metals, special attention is paid to the results obtained in such studies. Changes of physiological and biochemical properties of plant cells, with particular regard to the influence of Se on the activation of enzymatic and non-enzymatic antioxidants under this stress, are summarized. Experiments in which Se was used in some other environmental stresses (drought, UV, cold and high temperature) are also cited. On the basis of the presented literature it is suggested that a positive effect of Se depends on both its doses and on chosen plant genotypes and is mainly connected with activation of antioxidative defense in plant cells.
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Hussain N, Li H, Jiang YX, Jabeen Z, Shamsi IH, Ali E, Jiang LX. Response of seed tocopherols in oilseed rape to nitrogen fertilizer sources and application rates. J Zhejiang Univ Sci B 2014; 15:181-93. [PMID: 24510711 DOI: 10.1631/jzus.b1300036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Tocopherols (Tocs) are vital scavengers of reactive oxygen species (ROS) and important seed oil quality indicators. Nitrogen (N) is one of the most important fertilizers in promoting biomass and grain yield in crop production. However, the effect of different sources and application rates of N on seed Toc contents in oilseed rape is poorly understood. In this study, pot trials were conducted to evaluate the effect of two sources of N fertilizer (urea and ammonium nitrate). Each source was applied to five oilseed rape genotypes (Zheshuang 72, Jiu-Er-1358, Zheshuang 758, Shiralee, and Pakola) at three different application rates (0.41 g/pot (N1), 0.81 g/pot (N2), and 1.20 g/pot (N3)). Results indicated that urea increased α-, γ-, and total Toc (T-Toc) more than did ammonium nitrate. N3 was proven as the most efficient application rate, which yielded high contents of γ-Toc and T-Toc. Highly significant correlations were observed between Toc isomers, T-Toc, and α-/γ-Toc ratio. These results clearly demonstrate that N sources and application rates significantly affect seed Toc contents in oilseed rape.
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Affiliation(s)
- Nazim Hussain
- Key Laboratory of Crop Gene Resources of Zhejiang Province, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
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Physicochemical aspects of reaction of ozone with galactolipid and galactolipid-tocopherol layers. J Membr Biol 2014; 247:639-49. [PMID: 24862871 PMCID: PMC4052016 DOI: 10.1007/s00232-014-9681-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 05/10/2014] [Indexed: 12/05/2022]
Abstract
The impact of reaction of galactolipids with ozone on the physicochemical properties of their monolayers was examined. In Megli and Russo (Biochim Biophys Acta, 1778:143–152, 2008), Cwiklik and Jungwirth (Chem Phys Lett, 486:99–103, 2010), Jurkiewicz et al. (Biochim Biophys Acta, 1818:2388–2402, 2012), Khabiri et al. (Chem Phys Lett, 519:93–99, 2012), and Conte et al. (Biochim Biophys Acta, 1828:510–517, 2013), the properties of layers formed from model mixtures composed of chosen lipids and selected oxidation products were studied, whereas in this work, question was raised as to how the oxidation reactions taking place in situ affect the physical properties of the galactolipid layers. So, set experiment should take into account the effect of all reaction products. The mechanical characteristics of monolayers of monogalactosyldiacyl-glycerol (MGDG) and digalactosyldiacylglycerol (DGDG) were determined by Langmuir trough technique, and the electrical properties of liposomes formed from these lipids by measuring their electrophoretic mobility. Considerable loss of galactolipid molecules forming monolayers was found at ozone concentrations (in aqueous medium) higher than 0.1 ppm with a stronger effect measured for MGDG. That goes along with the greater amounts of MDA found in the extracts of oxidized MGDG films compared with DGDG. Based on this, it was concluded that an additional galactose group present in DGDG molecules acts protectively under oxidative conditions. The surface tension of the solutions (of small volume) contacting the oxidized galactolipids films was significantly reduced, indicating the presence of soluble in polar media, surface active reaction products. The presence of α-tocopherol in mixtures with tested galactolipids at a molar ratio of lipid to tocopherol equal to 1.7:1 caused some inhibition of lipid oxidation, reducing the decrease of amount of lipid particles forming the monolayer. Here, also protective effect of α-tocopherol was greater for the MGDG compared to DGDG.
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Dynarowicz-Łątka P, Wnętrzak A, Broniatowski M, Flasiński M. Miscibility and phase separation in mixed erucylphosphocholine–DPPC monolayers. Colloids Surf B Biointerfaces 2013; 107:43-52. [DOI: 10.1016/j.colsurfb.2013.01.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Revised: 01/07/2013] [Accepted: 01/14/2013] [Indexed: 01/12/2023]
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