Journal of Siberian Federal University. Biology / The Effect of UV-B Radiation on the Antioxidant System in the Peltigera aphthosa and Peltigera rufescens Lichens

Full text (.pdf)
Issue
Journal of Siberian Federal University. Biology. 2021 14 (3)
Authors
Shelyakin, Mikhail A.; Silina, Ekaterina V.; Golovko, Tamara K.
Contact information
Shelyakin, Mikhail A.: Institute of Biology of Komi Scientific Centre of the Ural Branch of RAS Syktyvkar, Russian Federation; ; ORCID: 0000-0001-8537-6995; Silina, Ekaterina V.: Institute of Biology of Komi Scientific Centre of the Ural Branch of RAS Syktyvkar, Russian Federation; ORCID: 0000-0002-9632-3431; Golovko, Tamara K.: Institute of Biology of Komi Scientific Centre of the Ural Branch of RAS Syktyvkar, Russian Federation; ORCID: 0000-0002-7993-9541
Keywords
Peltigera aphthosa; Peltigera rufescens; lichens; UV-B radiation; lipid peroxidation; hydrogen peroxide; superoxide dismutase; alternative respiratory pathway; resistance; Peltigera aphthosa; Peltigera rufescens
Abstract

Ultraviolet (UV) radiation is the short wavelength region of the solar spectrum. The high-energy photons of UV-B (280–315 nm) are potentially dangerous for all living organisms. The effect of UV-B radiation on lichens has not been studied sufficiently. We conducted a comparative study of the effects of the long-term (10 d) exposure to the environmentally realistic dose of UV-B radiation on the accumulation of lipid peroxidation products (TBARS), H2O2 content, superoxide dismutase (SOD) activity, and respiration rate in Peltigera aphthosa from the forest community and Peltigera rufescens from the open spaces of floodplain meadow. The H2O2 content and the SOD activity were found to increase in the thalli of P. rufescens. The TBARS content in the UV-B treated thalli of P. rufescens did not differ from the control thalli and was 2.5 times higher than in P. aphthosa. In P. aphthosa thalli, SOD activity did not change after UV-B exposure, and TBARS content increased by 33 % with an increase in the total UV-B dose. Both lichens exhibited an increase in the alternative respiratory pathway (AP) activity and a decrease in the ratio of the main (cytochrome) pathway to the energy low efficient AP. The AP involvement was more pronounced in P. aphthosa. The results of our study indicate the species-specific response in lichens and differences in their resistance to oxidative stress, which were due to adaptation to the light conditions in the typical habitats of these species

Pages
328–338
DOI
10.17516/1997-1389-0359
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/143406

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