Thermal dependence of the antioxidant enzymes superoxide dismutase, catalase, and peroxidase in foliage of Iris pumila L
| Autor: | Branka Tucić, Ana Vuleta |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Antioxidant
medicine.medical_treatment General Biochemistry Genetics and Molecular Biology Superoxide dismutase natural populations Botany medicine POD SOD lcsh:QH301-705.5 Iris pumila chemistry.chemical_classification biology Thermal curves fungi CAT Understory specific activity biology.organism_classification Enzyme Point of delivery activation energy lcsh:Biology (General) chemistry Catalase biology.protein General Agricultural and Biological Sciences Peroxidase |
| Zdroj: | Archives of Biological Sciences, Vol 61, Iss 3, Pp 441-446 (2009) |
| ISSN: | 1821-4339 0354-4664 |
| DOI: | 10.2298/abs0903441v |
| Popis: | Thermal dependence of the enzymes SOD, CAT, and POD was investigated in leaves of Iris pumila plants inhabiting two contrasting light environments, a sun-exposed dune site and a woodland understory. At the same assay temperature, both the specific activity and the activation energy of SOD and CAT were higher in plants inhabiting vegetation shade than in those experiencing full sunlight. Conversely, the temperature optima for the two enzymes did not differ between alternative radiation environments. The specific activity of POD increased with temperature increase, and was always greater in plants growing under full sunlight than in those from vegetation shade. The activation energy of POD was higher than that of SOD or CAT, being lower in sun-than in shade-exposed plants. |
| Databáze: | OpenAIRE |
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