Influence of extreme ambient temperatures and anaerobic conditions on Peltigera aphthosa (L.) Willd. viability.

Autor: Dyakov MY; Lomonosov Moscow State University, Faculty of Biology, 119992 Moscow, Russia. Electronic address: max_fungi@mail.ru., Insarova ID; Lomonosov Moscow State University, Faculty of Biology, 119992 Moscow, Russia., Kharabadze DE; Lomonosov Moscow State University, Faculty of Physics, 119992 Moscow, Russia., Ptushenko VV; Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, 119992 Moscow, Russia; Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, ul. Kosygina 4, 119334 Moscow, Russia. Electronic address: ptush@belozersky.msu.ru., Shtaer OV; Lomonosov Moscow State University, Faculty of Biology, 119992 Moscow, Russia.
Jazyk: angličtina
Zdroj: Life sciences in space research [Life Sci Space Res (Amst)] 2015 Nov; Vol. 7, pp. 66-72. Date of Electronic Publication: 2015 Oct 22.
DOI: 10.1016/j.lssr.2015.10.002
Abstrakt: Lichen are symbiotic systems constituted by heterotrophic fungi (mycobionts) and photosynthetic microorganism (photobionts). These organisms can survive under extreme stress conditions. The aim of this work was to study the influence of low (-70 °C) or high (+70 °C) temperatures, temperature fluctuations from +70 °C to -70 °C, and anaerobic conditions on P. aphthosa (L.) Willd. viability. None of the studied stress factors affected significantly photosynthetic and respiratory activity of the thalli. No changes in morphology or ultrastructure of the cells were revealed for both photobiont and mycobiont components after extreme temperature treatment of P. aphthosa thalli. The data show the extreme tolerance of P. aphthosa to some stress factors inherent to the space flight conditions.
(Copyright © 2015 The Committee on Space Research (COSPAR). Published by Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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