Tolerance to photoinhibition within lichen species is higher in melanised thalli
| Autor: | T.C. Mafole, Knut Asbjørn Solhaug, R.P. Beckett, F.V. Minibayeva |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Photoinhibition Physiology Population Plant Science acclimation Peltigera aphthosa 01 natural sciences desiccation lcsh:Botany Botany Ultraviolet light uv-b education Lichen Lobaria pulmonaria education.field_of_study biology Cetraria 04 agricultural and veterinary sciences biology.organism_classification lcsh:QK1-989 photoprotection 040103 agronomy & agriculture Pseudocyphellaria 0401 agriculture forestry and fisheries 010606 plant biology & botany |
| Zdroj: | Photosynthetica, Vol 57, Iss 1, Pp 96-102 (2019) |
| ISSN: | 1573-9058 0300-3604 |
| DOI: | 10.32615/ps.2019.008 |
| Popis: | Some lichenized ascomycetes synthesize melanic pigments when exposed to ultraviolet light and high solar radiation. Here, we used chlorophyll fluorescence in order to test the effect of melanisation on the ability of the lichens Cetraria islandica, Lobaria pulmonaria, Peltigera aphthosa, P. membranacea, Pseudocyphellaria gilva, and Sticta sublimbata to tolerate high-light stress. For each species, melanised and pale thalli were selected from relatively exposed and shaded individuals of the same population. For all species, melanised thalli displayed significantly less photoinhibition than pale thalli following a controlled exposure of hydrated thalli to high light. Melanised thalli were less photoinhibited than pale thalli in lichens from both high light and more shaded habitats, and those that possess either green-algal or cyanobacterial photobionts. Photoinhibition also occurred when dry lichens were exposed to high light; melanised thalli showed again less photoinhibition. Melanised thalli are less sensitive to the adverse effects of high light. |
| Databáze: | OpenAIRE |
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