KFU. Card publication. Topography of UV-Melanized Thalli of Lobaria pulmonaria (L.) Hoffm

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TOPOGRAPHY OF UV-MELANIZED THALLI OF LOBARIA PULMONARIA (L.) HOFFM

Form of presentation

Articles in international journals and collections

Year of publication

2023

Язык

русский

Authors, employees of KFU

Daminova Amina Galeevna, author

Minibaeva Farida Vilevna, author

Bibliographic description in the original language

Daminova A.G., Rassabina A.E., Khabibrakhmanova V.R., Beckett R.P., Minibayeva F.V., Topography of UV-melanized thalli of Lobaria pulmonaria (L.) Hoffm. / A.G. Daminova, A.E. Rassabina, V.R. Khabibrakhmanova, R.P. Beckett, F.V. Minibayeva // Plants. - 2023. - V. 12. - № 2627. - P. 1-12.

Annotation

Lichens are unique extremophilic organisms due to their phenomenal resistance to adverse environmental factors, including ultraviolet (UV) irradiation. Melanization plays a special role in the protection of lichens from UV-B stress. In the present study, we analyzed the binding of melanins with the components of cell walls of the mycobiont of the upper cortex in the melanized lichen thalli Lobaria pulmonaria. Using scanning electron and atomic force microscopy, the morphological and nanomechanical characteristics of the melanized layer of mycobiont cells were visualized. Melanization of lichen thalli led to the smoothing of the surface relief and thickening of mycobiont cell walls, as well as the reduction in adhesion properties of the lichen thallus. Treatment of thalli with hydrolytic enzymes, especially chitinase and lichenase, enhanced the yield of melanin from melanized thalli and promoted the release of carbohydrates, while treatment with pectinase increased the release of carbohydrates and phenols. Our results suggest that melanin can firmly bind with hyphal cell wall carbohydrates, particularly chitin and 1,4-β-glucans, strengthening the melanized upper cortex of lichen thalli, and thereby it can contribute to lichen survival under UV stress.

Keywords

lichen, UV-induced melanization, melanin, topography, hydrolytic enzymes, microscopy

The name of the journal

Plants

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

https://repository.kpfu.ru/eng/?p_id=310644&p_lang=2

Resource files

File name	Size (MB)	Format
F_plants_12_02627__1_.pdf	4,33	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	2023-01-01T00:00:00Z	ru_RU
dc.date.available	2023-01-01T00:00:00Z	ru_RU
dc.date.issued	2023	ru_RU
dc.identifier.citation	Daminova A.G., Rassabina A.E., Khabibrakhmanova V.R., Beckett R.P., Minibayeva F.V., Topography of UV-melanized thalli of Lobaria pulmonaria (L.) Hoffm. / A.G. Daminova, A.E. Rassabina, V.R. Khabibrakhmanova, R.P. Beckett, F.V. Minibayeva // Plants. - 2023. - V. 12. - № 2627. - P. 1-12.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=310644&p_lang=2	ru_RU
dc.description.abstract	Plants	ru_RU
dc.description.abstract	Lichens are unique extremophilic organisms due to their phenomenal resistance to adverse environmental factors, including ultraviolet (UV) irradiation. Melanization plays a special role in the protection of lichens from UV-B stress. In the present study, we analyzed the binding of melanins with the components of cell walls of the mycobiont of the upper cortex in the melanized lichen thalli Lobaria pulmonaria. Using scanning electron and atomic force microscopy, the morphological and nanomechanical characteristics of the melanized layer of mycobiont cells were visualized. Melanization of lichen thalli led to the smoothing of the surface relief and thickening of mycobiont cell walls, as well as the reduction in adhesion properties of the lichen thallus. Treatment of thalli with hydrolytic enzymes, especially chitinase and lichenase, enhanced the yield of melanin from melanized thalli and promoted the release of carbohydrates, while treatment with pectinase increased the release of carbohydrates and phenols. Our results suggest that melanin can firmly bind with hyphal cell wall carbohydrates, particularly chitin and 1,4-β-glucans, strengthening the melanized upper cortex of lichen thalli, and thereby it can contribute to lichen survival under UV stress.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	lichen	ru_RU
dc.subject	UV-induced melanization	ru_RU
dc.subject	melanin	ru_RU
dc.subject	topography	ru_RU
dc.subject	hydrolytic enzymes	ru_RU
dc.subject	microscopy	ru_RU
dc.title	Topography of UV-Melanized Thalli of Lobaria pulmonaria (L.) Hoffm	ru_RU
dc.type	Articles in international journals and collections	ru_RU