KFU. Card publication. Morphological, physiological, and biochemical traits of melanized thallus of the Cetraria islandica lichen

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FEDERAL UNIVERSITY

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MORPHOLOGICAL, PHYSIOLOGICAL, AND BIOCHEMICAL TRAITS OF MELANIZED THALLUS OF THE CETRARIA ISLANDICA LICHEN

Form of presentation

Articles in Russian 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. Morphological, physiological, and biochemical traits of melanized thallus of the Cetraria islandica lichen / A. G. Daminova, E. I. Galeeva, D. F. Rakhmatullina, L. V. Viktorova, F. V. Minibayeva // Russian Journal of Plant Physiology. - 2024. - V. 71. - P. 92. (perevodnaya)

Annotation

Lichens are extremophilic symbiotic associations possessing phenomenal resistance to abiotic stress-factors. In this regard, melanization of thalli in response to UV is one of the mechanisms protecting lichens from excessive insolation. However, microstructure and biochemical properties of the melanized thalli are still poorly investigated. In the present study, morphological, nanomechanical, and physiological, and biochemical traits of naturally melanized thalli of the Cetraria islandica (L.) Ach. lichen were examined. In the upper cortex of its thallus, the nature of the pigment layer was verified using typical qualitative reactions for melanins. It was found that melanization leads to changes in microstructure of the upper cortex of the mycobiont, in particular, thickening of the cell walls and extension of the interhyphal space. The melanized and pale (nonmelanized) thalli were found to differ from each other in their nanomechanical properties, including the parameters of adhesion and rigidity. This implies the possible formation of complex associates of melanin with cell wall components in the melanized mycobiont. In addition, higher antioxidant activity and lower respiratory activity were found in the melanized thalli of C. islandica in comparison with the pale thalli. Presumably, the found modifications in the microstructure and nanomechanical, physiological, and biochemical properties of thalli occurring in the course of melanization make lichens more resistant to intense insolation.

Keywords

Cetraria islandica, antioxidant activity, respiration, lichens, melanization, thallus morphology, topography

The name of the journal

Russian Journal of Plant Physiology

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

https://repository.kpfu.ru/eng/?p_id=310631&p_lang=2

Resource files

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F_S1021443724606104__1_.pdf	3,03	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. Morphological, physiological, and biochemical traits of melanized thallus of the Cetraria islandica lichen / A. G. Daminova, E. I. Galeeva, D. F. Rakhmatullina, L. V. Viktorova, F. V. Minibayeva // Russian Journal of Plant Physiology. - 2024. - V. 71. - P. 92. (��)	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=310631&p_lang=2	ru_RU
dc.description.abstract	Russian Journal of Plant Physiology	ru_RU
dc.description.abstract	Lichens are extremophilic symbiotic associations possessing phenomenal resistance to abiotic stress-factors. In this regard, melanization of thalli in response to UV is one of the mechanisms protecting lichens from excessive insolation. However, microstructure and biochemical properties of the melanized thalli are still poorly investigated. In the present study, morphological, nanomechanical, and physiological, and biochemical traits of naturally melanized thalli of the Cetraria islandica (L.) Ach. lichen were examined. In the upper cortex of its thallus, the nature of the pigment layer was verified using typical qualitative reactions for melanins. It was found that melanization leads to changes in microstructure of the upper cortex of the mycobiont, in particular, thickening of the cell walls and extension of the interhyphal space. The melanized and pale (nonmelanized) thalli were found to differ from each other in their nanomechanical properties, including the parameters of adhesion and rigidity. This implies the possible formation of complex associates of melanin with cell wall components in the melanized mycobiont. In addition, higher antioxidant activity and lower respiratory activity were found in the melanized thalli of C. islandica in comparison with the pale thalli. Presumably, the found modifications in the microstructure and nanomechanical, physiological, and biochemical properties of thalli occurring in the course of melanization make lichens more resistant to intense insolation.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Cetraria islandica	ru_RU
dc.subject	antioxidant activity	ru_RU
dc.subject	respiration	ru_RU
dc.subject	lichens	ru_RU
dc.subject	melanization	ru_RU
dc.subject	thallus morphology	ru_RU
dc.subject	topography	ru_RU
dc.title	Morphological, physiological, and biochemical traits of melanized thallus of the Cetraria islandica lichen	ru_RU
dc.type	Articles in Russian journals and collections	ru_RU