Yeasts are often exposed to variations in osmotic pressure in their natural environments or in their substrates when used in fermentation industries. Such changes may lead to cell death or activity loss. Previous work by our team has allowed us to relate the mortality of cells exposed to a combination of thermal and osmotic treatments to leakage of cellular components through an unstable membrane when lipid phase transition occurs. In this study, yeast viability was measured after numerous osmotic and thermal treatments. In addition, the fluidity of yeast membranes was assessed according to a(w) and temperature by means of 1,6-diphenyl-1,3,5-hexatriene (DPH) anisotropy measurement. The results show that there is a negative correlation between the overall fluidity variation undergone by membranes during treatments and yeast survival. Using a diagram of membrane fluidity according to a(w) and temperature, we defined dehydration and rehydration methods that minimize fluidity fluctuations, permitting significantly increased yeast survival. Thus, such membrane fluidity diagram should be a potential tool for controlling membrane state during dehydration and rehydration and improve yeast survival. Overall fluidity measurements should now be completed by accurate structural analysis of membranes to better understand the plasma membrane changes occurring during dehydration and rehydration.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/bit.21749 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Impaired lipid homeostasis and elevated lipid oxidation of erythrocyte membrane in adolescent depression.
Redox Biol
January 2025
Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders, Ministry of Education, Shanghai Jiao Tong University, Shanghai, China; Shanghai Mental Health Center, Shanghai Key Laboratory of Psychiatry Disorders, Shanghai Jiao Tong University, Shanghai, China. Electronic address:
Adolescent depression is a globally concerned mental health issue, the pathophysiological mechanisms of which remain elusive. Membrane lipids play a crucial role in brain development and function, potentially serving as a crossroad for the abnormalities in neurotransmitters, neuroendocrine, inflammation, oxidative stress, and energy metabolism observed in depressed adolescents. The primary aim of this study was to investigate the erythrocyte membrane lipid profile in adolescent depression.
View Article and Find Full Text PDFCurrent status of cyclopropane fatty acids on bacterial cell membranes characteristics and physiological functions.
Microb Pathog
January 2025
Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou, China.
Wide-ranging sophisticated physiological activities of cell membranes are associated with changes in fatty acid structure and composition. The cfa gene is a core regulator of cell membrane fatty acid cyclopropanation reaction. Its encoded cyclopropane fatty acid synthase (CFA synthase) catalyzes the binding of unsaturated fatty acid (UFA) to methylene groups, which undergoes cyclopropanation modification to produce cyclopropane fatty acids (CFAs).
View Article and Find Full Text PDFEfficient degradation of corn straw at low temperature using a novel co-cultured consortium LHWA.
J Biosci Bioeng
January 2025
College of Biological Engineering, Qingdao University of Science and Technology, Qingdao 266045, China.
Article Synopsis
- Straw degradation is slow in cold environments, but a consortium of bacteria and fungi, named LHWA, was developed to enhance this process.
- Under 4 °C, this consortium achieved a 55.52% straw weight loss in liquid fermentation after 30 days and 58.36% in solid fermentation after 60 days.
- Transcriptomic analysis indicated that B. cereus, part of the consortium, enhances cold resistance by modifying cell membrane fluidity and increasing cold stress response proteins.
Tetrabromobisphenol A, but not bisphenol A, disrupts plasma membrane homeostasis in myeloid cell models - A novel threat from an established persistent organic pollutant.
Sci Total Environ
January 2025
Department of Oncobiology and Epigenetics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland; Laboratory of Transcriptional Regulation, Institute of Medical Biology PAS, Lodz, Poland. Electronic address:
Article Synopsis
- The study investigates the effects of Bisphenol A (BPA) and Tetrabromobisphenol A (TBBPA) on the dynamics of biological membranes, focusing on how these persistent organic pollutants impact myeloid cell lines.
- It was found that TBBPA specifically disrupts the plasma membrane's biophysical homeostasis, increasing mobility and decreasing order, while BPA showed no significant effects.
- The findings highlight TBBPA's potential to impair immune function, emphasizing the environmental toxicity concerns associated with persistent organic pollutants.
Linoleic acid alleviates aluminum toxicity by modulating fatty acid composition and redox homeostasis in wheat (Triticum aestivum) seedlings.
J Hazard Mater
January 2025
MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China. Electronic address:
Lipids, as key components of biological membranes, play vital roles in sensing and initiating plant responses to various abiotic stresses. Here, the alteration of membrane fatty acids in wheat roots under Al stress was investigated using two genotypes differing in Al tolerance, and the role of linoleic acid in Al tolerance was comprehensively explored. Significant differences in the fatty acid profiles were observed, with increased linoleic acid accumulation in the Al-tolerant genotype.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!