The ice nucleation activity of extremophilic algae

0397593 - BÚ 2014 RIV GB eng J - Článek v odborném periodiku
Kvíderová, Jana - Hájek, J. - Worland, M. R.
The ice nucleation activity of extremophilic algae.
Cryo-letters. Roč. 34, č. 2 (2013), s. 137-148. ISSN 0143-2044. E-ISSN 1742-0644
Grant CEP: GA AV ČR KJB601630808; GA AV ČR KJB600050708
Institucionální podpora: RVO:67985939
Klíčová slova: Ice nucleation * snow algae * lichen photobionts
Kód oboru RIV: EF - Botanika
Impakt faktor: 0.640, rok: 2013

The ice nucleation activity was examined in snow algae, Chlamydomonas cf. nivalis and Chloromonas nivalis, and in lichen photobionts, Trebouxia asymmetrica, Trebouxia erici and Trebouxia glomerata. A mesophilic strain, Chlamydomonas reinhardtii, was used as a reference. The algae had lower ice nucleation activity, with the exception of Chloromonas nivalis contaminated by bacteria. The supercooling points of the snow algae were higher than those of lichen photobionts. The supercooling points of both, mesophilic and snow Chlamydomonas strains were similar. The lower freezing temperatures of the lichen algae may reflect either the more extreme and more variable environmental conditions of the original localities or the different cellular structure of the strains examined.
Trvalý link: http://hdl.handle.net/11104/0228970