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Type of publication: Konferencijų tezės nerecenzuojamuose leidiniuose / Conference theses in non-peer-reviewed publications (T2)
Field of Science: Biochemija / Biochemistry (N004)
Author(s): Galalytė, Deimantė;Kuliešienė, Neringa;Daugelavičius, Rimantas
Title: Effect of preincubation in hypertonic media on the desiccation tolerance of Saccharomyces cerevisiae cells
Is part of: COINS 2018: 13th international conference of life sciences, 28 February – 2 March 2018: book of abstracts. Vilnius: Vilniaus universitetas, Gyvybės mokslų centras, 2018
Extent: p. 129-130
Date: 2018
Note: This study was supported by Research Council of Lithuania, funding grant No TAP-LLT-3/2016 and Ministry of Science and Technology, Taiwan
Keywords: Saccharomyces cerevisiae cells;Cell preincubation;Metabolic activity
Abstract: Saccharomyces cerevisiae is a unicellular eukaryotic organism that often undergoes transition into the state of anhydrobiosis. During desiccation these cells lose the intracellular water, but still protect their structures from damages for successful recovery during rehydration. Aim: This study was performed to explore effects of cell preincubation in concentrated metabolizable carbon sources solutions on the resistance of S. cerevisiae to dehydrationrehydration. Materials and methods: Two S. cerevisiae strains were studied: #14 – semi-resistant, and #77 – very resistant to dehydration. The cells were incubated in 1 M solutions of glucose, lactose or glycerol for 3 h and desiccated at 30 oC for 21 h. Metabolic activity of the cells during rehydration was assayed by oxygen consumption test and fluorescence microscopy. Results: This study revealed that 1 M lactose-pretreated cells of #14 strain were consuming 70 % and 1 M glycerol-pretreated - 90% of the incubation medium dissolved oxygen. 1 M lactosepretreated cells of #77 strain were consuming 40 % of the dissolved oxygen, i.e., about 2-fold less than #14 strain, and 1 M glycerolpretreated - 50 % of the dissolved O2. The most intriguing result of this study is that after preincubation in the concentrated solutions of lactose or glycerol cells “switched” their phenotypes: #14 strain has become more resistant to dehydration than #77 one. However, such protection was not observed after preincubation in 1 M glucose.[...]
Affiliation(s): Biochemijos katedra
Gamtos mokslų fakultetas
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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