Effect of acute gamma radiation on some physiological features of lichens |
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| Affiliation: | 1. PNPD/CAPES/UFERSA, Brazil;2. Federal University of Piauí, Department of Agronomy, Brazil;3. Federal Rural University of Pernambuco, Department of Agronomy, R. Manuel de Medeiros, s/n, Dois Irmãos, Recife, Pernambuco 52171-900, Brazil;4. Federal University of Rio Grande do Norte UFRN, Department of Earth Science, Brazil;5. EMBRAPA Semiárido, Brazil;6. Federal University of Rio Grande do Norte UFRN, Department of Agronomy, Brazil |
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| Abstract: | The influence of acute gamma radiation on four physiological characteristics of lichens was investigated. Membrane permeability in irradiated thalli of Cladonia arbuscula, Cetraria islandica and Hypogymnia physodes increased considerably compared to controls. The nitrogen content in Peltigera aphthosa appeared to be stable to acute gamma radiation. Up to 1000 Gy there was no essential decrease in respiration intensity in H. physodes and P. aphthosa or of peroxidase activity in P. aphthosa. |
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