Kit N.A.
Changes of the activity of antioxidant protection enzymes and the content of TBC-active compounds in mosses cells of forest ecosystems depending on the ecological conditions of the growing site // Proc. of the State Nat. Hist. Mus. - Lviv, 2025. - 41. - P. 87-96 DOI: https://doi.org/10.36885/nzdpm.2025.41.87-96 Key words: mosses, microclimatic conditions, peroxidase, superoxide dismutase, catalase, TBA-active products The activity of the main enzymes of antioxidant defense: peroxidase, superoxide dismutase (SOD) and catalase and the content of TBA-active compounds as indicators of lipid peroxidation in cells of oxidative stress in shoots of dominant epigeal moss species of forest ecosystems of the Ukrainian Roztochia Atrichum undulatum (Hedw.) P. Beauv. and Plagiomnium elatum (Bruch & Schimp.) T.J. Kop. depending on the environmental conditions of the growing sites were investigated. The experimental areas from which moss samples were taken differed in water, temperature regimes, and light intensity: the zone of complete preservation of old-growth beech forests of the Roztochia Nature Reserve, the 40-year-old logging area of the Stradchiv Forestry Combine, and the Vereshchytsia stationary recreation area of the Yavoriv National Nature Park. Under unfavorable conditions of hydrothermal regime and high insolation of anthropogenically disturbed areas of forest ecosystems, compared to the zone of complete conservation, the activity of enzymes and the content of TBA-active compounds increased in the cells of dominant moss species Atrichum undulatum and Plagiomnium еlatum, which indicates the activation of protective mechanisms and increased resistance of mosses to environmental stress factors. It was found that the activity of antioxidant enzymes depends on the species characteristics of the studied mosses, and it is significantly higher for Atrichum undulatum, which turned out to be more resistant to abiotic stress factors, in particular, unfavorable temperature and water conditions, which indicates a high level of antioxidant protection and the ability of plants to effectively neutralize reactive oxygen species. The results obtained indicate that changes in enzyme activity and the content of TBA-active products in the gametophyte of mosses largely depend on microclimatic conditions of the habitat and are a manifestation of protective reactions of bryophytes to the influence of unfavorable environmental factors. It was noted that peroxidation processes and the level of antioxidant activity are interconnected and are an important indicator of the impact of various factors, in particular water deficit and increased insolation, on plants.
Changes of the activity of antioxidant protection enzymes and the content of TBC-active compounds in mosses cells of forest ecosystems depending on the ecological conditions of the growing site // Proc. of the State Nat. Hist. Mus. - Lviv, 2025. - 41. - P. 87-96 DOI: https://doi.org/10.36885/nzdpm.2025.41.87-96 Key words: mosses, microclimatic conditions, peroxidase, superoxide dismutase, catalase, TBA-active products The activity of the main enzymes of antioxidant defense: peroxidase, superoxide dismutase (SOD) and catalase and the content of TBA-active compounds as indicators of lipid peroxidation in cells of oxidative stress in shoots of dominant epigeal moss species of forest ecosystems of the Ukrainian Roztochia Atrichum undulatum (Hedw.) P. Beauv. and Plagiomnium elatum (Bruch & Schimp.) T.J. Kop. depending on the environmental conditions of the growing sites were investigated. The experimental areas from which moss samples were taken differed in water, temperature regimes, and light intensity: the zone of complete preservation of old-growth beech forests of the Roztochia Nature Reserve, the 40-year-old logging area of the Stradchiv Forestry Combine, and the Vereshchytsia stationary recreation area of the Yavoriv National Nature Park. Under unfavorable conditions of hydrothermal regime and high insolation of anthropogenically disturbed areas of forest ecosystems, compared to the zone of complete conservation, the activity of enzymes and the content of TBA-active compounds increased in the cells of dominant moss species Atrichum undulatum and Plagiomnium еlatum, which indicates the activation of protective mechanisms and increased resistance of mosses to environmental stress factors. It was found that the activity of antioxidant enzymes depends on the species characteristics of the studied mosses, and it is significantly higher for Atrichum undulatum, which turned out to be more resistant to abiotic stress factors, in particular, unfavorable temperature and water conditions, which indicates a high level of antioxidant protection and the ability of plants to effectively neutralize reactive oxygen species. The results obtained indicate that changes in enzyme activity and the content of TBA-active products in the gametophyte of mosses largely depend on microclimatic conditions of the habitat and are a manifestation of protective reactions of bryophytes to the influence of unfavorable environmental factors. It was noted that peroxidation processes and the level of antioxidant activity are interconnected and are an important indicator of the impact of various factors, in particular water deficit and increased insolation, on plants.
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