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Variations in the content of tonoplast lipids under abiotic stress

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Abstract

Main conclusion

The vacuolar membrane is an essential component in protecting the plant cell from stress factors. Different variations in the tonoplast lipid content, which depend on the type of stress, have been reviewed.

Abstract

The lipid content of vacuolar membranes of beet roots (Beta vulgaris L.) under hypoosmotic, hyperosmotic and oxidative types of stress has been studied. These types of stress induce variations in the content of almost all the classes of studied lipids (phospholipids, glycoglycerolipids, sterols and fatty acids). The variations, which are characteristic of a single stress, include the variations (i) in the content of individual glycoglycerolipids and in their total content, (ii) in the total content of sterols, and (iii) in the ratio of content of phosphatidylcholine/phosphatidylethanolamine in the scope of tonoplast phospholipids. Variations observed under all of the types of stress under scrutiny include (i) variations in the content of fatty acids of tonoplast lipids, (ii) some decrease in the content of phosphatidic acid and phosphatidylethanolamine, and (iii) variations in the content of individual sterols. Stigmasterol, campesterol, as well as the stigmasterol/sitosterol ratio increased in varying degrees under all of the types of stress. The most substantial variations have been observed in the content of sterols under abiotic stress. This is probably due to role of sterols in regulation of such membrane characteristics as permeability and microviscosity. In our opinion, sterols may represent one of the main components of tonoplast adaptive mechanisms.

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Abbreviations

DGDG:

Digalactosyldiacylglycerol

FA:

Fatty acid

GL:

Glycoglycerolipid

MGDG:

Monogalactosyldiacylglycerol

PA:

Phosphatidic acid

PC:

Phosphatidylcholine

PE:

Phosphatidylethanolamine

PI:

Phosphatidylinositol

PL:

Phospholipid

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Acknowledgements

This work was carried out with aid of equipment granted by Central Analytical Center “Bioanalytics” of Siberian Institute of Plant Physiology and Biochemistry (Siberian Branch, Russian Academy of Sciences, Irkutsk).

Funding

This work was carried out with partial support of the Russian Foundation for Basic Research, grant No. 19–04-00013.

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Correspondence to Veronika V. Gurina.

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The authors declare no potential conflicts of interest.

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Communicated by Dorothea Bartels.

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Ozolina, N.V., Gurina, V.V., Nesterkina, I.S. et al. Variations in the content of tonoplast lipids under abiotic stress. Planta 251, 107 (2020). https://doi.org/10.1007/s00425-020-03399-x

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  • DOI: https://doi.org/10.1007/s00425-020-03399-x

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