KFU. Card publication. The roles of the anthraquinone parietin in the tolerance to desiccation of the lichen Xanthoria parietina: physiology and anatomy of the pale and bright-orange thalli

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THE ROLES OF THE ANTHRAQUINONE PARIETIN IN THE TOLERANCE TO DESICCATION OF THE LICHEN XANTHORIA PARIETINA: PHYSIOLOGY AND ANATOMY OF THE PALE AND BRIGHT-ORANGE THALLI

Form of presentation

Articles in international journals and collections

Year of publication

2024

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Authors, employees of KFU

Daminova Amina Galeevna, author

Minibaeva Farida Vilevna, author

Bibliographic description in the original language

Daminova A. G. The roles of the anthraquinone parietin in the tolerance to desiccation of the lichen Xanthoria parietina: physiology and anatomy of the pale and bright-orange thalli / A.G. Daminova, I.Y. Leksin, V.R. Khabibrakhmanova, O.P. Gurjanov, E.I. Galeeva, T.V. Trifonova, A.R. Khamatgalimov, R.P. Beckett, F.V. Minibayeva // International Journal of Molecular Sciences. - 2024. - V. 25. - � 7067. - P. 1-11.

Annotation

Lichens are symbiotic organisms that effectively survive in harsh environments, including arid regions. Maintaining viability with an almost complete loss of water and the rapid restoration of metabolism during rehydration distinguishes lichens from most eukaryotic organisms. The lichen Xanthoria parietina is known to have high stress tolerance, possessing diverse defense mechanisms, including the presence of the bright-orange pigment parietin. While several studies have demonstrated the photoprotective and antioxidant properties of this anthraquinone, the role of parietin in the tolerance of lichens to desiccation is not clear yet. Thalli, which are exposed to solar radiation and become bright orange, may require enhanced desiccation tolerance. Here, we showed differences in the anatomy of naturally pale and bright-orange thalli of X. parietina and visualized parietin crystals on the surface of the upper cortex. Parietin was extracted from bright-orange thalli by acetone rinsing and quantified using HPLC. Although acetone rinsing did not affect PSII activity, thalli without parietin had higher levels of lipid peroxidation and a lower membrane stability index in response to desiccation. Furthermore, highly pigmented thalli possess thicker cell walls and, according to thermogravimetric analysis, higher water-holding capacities than pale thalli. Thus, parietin may play a role in desiccation tolerance by stabilizing mycobiont membranes, providing an antioxidative defense, and changing the morphology of the upper cortex of X. parietina.

Keywords

parietin, lichen, desiccation, thallus anatomy, photosynthesis, lipid peroxidation, membrane stability index, extractable substances, thermal decomposition

The name of the journal

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=310629&p_lang=2

Resource files

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ijms_25_07067_v2__1_.pdf	3,27	pdf	show / download

Full metadata record

Field DC	Value	Language
dc.contributor.author	Daminova Amina Galeevna	ru_RU
dc.contributor.author	Minibaeva Farida Vilevna	ru_RU
dc.date.accessioned	2024-01-01T00:00:00Z	ru_RU
dc.date.available	2024-01-01T00:00:00Z	ru_RU
dc.date.issued	2024	ru_RU
dc.identifier.citation	Daminova A. G. The roles of the anthraquinone parietin in the tolerance to desiccation of the lichen Xanthoria parietina: physiology and anatomy of the pale and bright-orange thalli / A.G. Daminova, I.Y. Leksin, V.R. Khabibrakhmanova, O.P. Gurjanov, E.I. Galeeva, T.V. Trifonova, A.R. Khamatgalimov, R.P. Beckett, F.V. Minibayeva // International Journal of Molecular Sciences. - 2024. - V. 25. - � 7067. - P. 1-11.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=310629&p_lang=2	ru_RU
dc.description.abstract	INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES	ru_RU
dc.description.abstract	Lichens are symbiotic organisms that effectively survive in harsh environments, including arid regions. Maintaining viability with an almost complete loss of water and the rapid restoration of metabolism during rehydration distinguishes lichens from most eukaryotic organisms. The lichen Xanthoria parietina is known to have high stress tolerance, possessing diverse defense mechanisms, including the presence of the bright-orange pigment parietin. While several studies have demonstrated the photoprotective and antioxidant properties of this anthraquinone, the role of parietin in the tolerance of lichens to desiccation is not clear yet. Thalli, which are exposed to solar radiation and become bright orange, may require enhanced desiccation tolerance. Here, we showed differences in the anatomy of naturally pale and bright-orange thalli of X. parietina and visualized parietin crystals on the surface of the upper cortex. Parietin was extracted from bright-orange thalli by acetone rinsing and quantified using HPLC. Although acetone rinsing did not affect PSII activity, thalli without parietin had higher levels of lipid peroxidation and a lower membrane stability index in response to desiccation. Furthermore, highly pigmented thalli possess thicker cell walls and, according to thermogravimetric analysis, higher water-holding capacities than pale thalli. Thus, parietin may play a role in desiccation tolerance by stabilizing mycobiont membranes, providing an antioxidative defense, and changing the morphology of the upper cortex of X. parietina.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	parietin	ru_RU
dc.subject	lichen	ru_RU
dc.subject	desiccation	ru_RU
dc.subject	thallus anatomy	ru_RU
dc.subject	photosynthesis	ru_RU
dc.subject	lipid peroxidation	ru_RU
dc.subject	membrane stability index	ru_RU
dc.subject	extractable substances	ru_RU
dc.subject	thermal decomposition	ru_RU
dc.title	The roles of the anthraquinone parietin in the tolerance to desiccation of the lichen Xanthoria parietina: physiology and anatomy of the pale and bright-orange thalli	ru_RU
dc.type	Articles in international journals and collections	ru_RU