Detection of lipid–protein microdomains (rafts) and investigation of their functional role in the chloroplast membranes of halophytes

Нестеров, В. Н.; Nesterkina, I. S.; Розенцвет, О. А.; Озолина, Н. В.; Salyaev, R. K.

doi:10.1134/s1607672917050040

Cited by 11 publications

(9 citation statements)

References 6 publications

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“…Membrane sterols are normally a small component of plant membranes, but are relatively enriched in the halophyte S. maritima (Leach et al, 1990). Chloroplast detergent-resistant membrane fractions from the halophyte Salicornia perennans contained a higher concentration of sterols than the less tolerant Artemisia santonicum (Nesterov et al, 2017).…”

Section: Vesicular Transport In Plantsmentioning

confidence: 87%

Could vesicular transport of Na+ and Cl– be a feature of salt tolerance in halophytes?

2018

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There is strong evidence in favour of vesicular transport in plants and circumstantial evidence in favour of the movement of ions in vesicles. Estimated rates of vesicle turnover could account for ion transport at the lower reported fluxes (around 20 nmol m-2 s-1), but the higher fluxes may require vesicles of the order of 1 μm or more in diameter. The very high fluxes reported in some salt glands might be an artefact of the way they were measured.

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Section: Vesicular Transport In Plantsmentioning

confidence: 87%

Could vesicular transport of Na+ and Cl– be a feature of salt tolerance in halophytes?

2018

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“…In those cells, ST turned out to be the dominant class of lipids, followed by GL and PL. There are also data on the involvement of ST in the formation of endomembranes, including membranes of EPR, mitochondria, and chloroplasts (Nesterov et al 2017). In response to the action of NaCl, the content of free ST was shown to grow, and the ST/PL ratio increased as well (Wu et al 2005).…”

Section: Sterolsmentioning

confidence: 99%

“…Impairment of sphingolipid synthesis can, therefore, lead to the disruption of the chloroplast envelope, disorganization of thylakoid membranes and degradation of photosynthetic pigments. The content of sphingolipids in the chloroplast membranes of eu-and glycohalophytes is only 2-3%, and it does not depend on the strategy of salt accumulation (Nesterov et al 2017). In halophyte mitochondria, on the other handthe organelles supplying the cell with energythe content of sphingolipids reaches 11% of total membrane lipids (Rozentsvet et al 2019).…”

Section: Sphingolipidsmentioning

confidence: 99%

“…In the plant cell, rafts were found in plasmalemma, vacuole membranes, and membranes of the Golgi apparatus (Laloi et al 2007;Ozolina et al 2013). In the euhalophyte S. perennans and glycohalophyte A. santonica, raft structures were also found in the membranes of chloroplasts and mitochondria (Nesterov et al 2017;Rozentsvet et al 2019). An observation supporting the existence of rafts in plant membranes is the appearance of an opalescence zone in the sucrose gradient after high-speed centrifugation of detergent-treated plant material.…”

mentioning

confidence: 99%

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Lipids of Halophyte Species Growing in Lake Elton Region (South East of the European Part of Russia)

Розенцвет¹,

Нестеров²

2020

Handbook of Halophytes

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The chapter describes the specificity of lipid composition of halophytes growing in Prieltonie, one of the saline regions of the northern part of the Caspian lowland of Russia. In addition to salinization, the plants growing in this region experience the effects of intense insolation and high temperaturethroughout most of their vegetative season. Soil salinization is one of the main factors affecting on the dominance of halophytes in the region. The adaptation of plants to salt stress is based on the ability of cells to control the transport of salt across membranes.

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“…Rafts were found in the plasma membrane (Peskan et al 2000). Later, they were found in the membranes of the endoplasmic reticulum, the Golgi apparatus (Laloi et al 2007), mitochondria (Poston et al 2011), chloroplasts (Nesterov et al 2017), and tonoplast (Ozolina et al 2013). Rafts are defined as microdomains of cell membranes in which regions enriched in glycosphingolipids, sterols, and lipids with saturated fatty acids are formed around certain proteins making them denser than the surrounding membrane (Pike 2004).…”

Section: Introductionmentioning

confidence: 99%

Role of Plasmalemma Microdomains (Rafts) in Protection of the Plant Cell Under Osmotic Stress

et al. 2021

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Lipid-protein microdomains (presumably rafts) of the plasmalemma isolated from the beetroots subjected to hyperosmotic stress and hypoosmotic stress were studied. In these microdomains, the variations in the composition of total lipids, sterols, and fatty acids were observed. These variations differed under hypo-and hyperosmotic types of stress. We presumed that such variations were bound up with different strategies, which are probably related to protecting the cell from osmotic stress. One of the protection tendencies might be related, in our opinion, to credible growth of the content of such lipids as sterols and sterol esters, which are considered as raft-forming. Under osmotic stress, these lipids can contribute to the formation of both new raft structures and new membrane contacts of plasmalemma with intracellular organelles. Another protection tendency may be bound up with the redistribution of membrane phospholipids and phosphoglycerolipids possibly to stabilize the membrane's lamellar structure, which is ensured by credible growth of the content of such lipids as phosphatidylcholines, phosphatidylinositols, and digalactosyldiacylglycerol. The participation of lipid-protein microdomains in the adaptive mechanisms of plant cells may, in our opinion, also be bound up with the redistribution of membrane sterols, which (redistribution) in a number of variants may provoke credible growth in the content of cholesterol or "anti-stress" sterols (campesterol and stigmasterol). So, according to our results, the variations in the content of the plasmalemma lipid-protein microdomains take place under osmotic stress. These variations may influence the functioning of plasmalemma and take part in the adaptive mechanisms of plant cells.

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Detection of lipid–protein microdomains (rafts) and investigation of their functional role in the chloroplast membranes of halophytes

Cited by 11 publications

References 6 publications

Could vesicular transport of Na+ and Cl– be a feature of salt tolerance in halophytes?

Could vesicular transport of Na+ and Cl– be a feature of salt tolerance in halophytes?

Lipids of Halophyte Species Growing in Lake Elton Region (South East of the European Part of Russia)

Role of Plasmalemma Microdomains (Rafts) in Protection of the Plant Cell Under Osmotic Stress

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