Stevenson, Andrew and Cray, Jonathan A and Williams, Jim P and Santos, Ricardo and Sahay, Richa and Neuenkirchen, Nils and McClure, Colin D and Grant, Irene R and Houghton, Jonathan DR and Quinn, John P and Timson, David J and Patil, Satish V and Singhal, Rekha S and Antón, Josefa and Dijksterhuis, Jan and Hocking, Ailsa D and Lievens, Bart and Rangel, Drauzio EN and Voytek, Mary A and Gunde-Cimerman, Nina and Oren, Aharon and Timmis, Kenneth N and McGenity, Terry J and Hallsworth, John E (2015) Is there a common water-activity limit for the three domains of life? The ISME Journal, 9 (6). pp. 1333-1351. DOI https://doi.org/10.1038/ismej.2014.219
Stevenson, Andrew and Cray, Jonathan A and Williams, Jim P and Santos, Ricardo and Sahay, Richa and Neuenkirchen, Nils and McClure, Colin D and Grant, Irene R and Houghton, Jonathan DR and Quinn, John P and Timson, David J and Patil, Satish V and Singhal, Rekha S and Antón, Josefa and Dijksterhuis, Jan and Hocking, Ailsa D and Lievens, Bart and Rangel, Drauzio EN and Voytek, Mary A and Gunde-Cimerman, Nina and Oren, Aharon and Timmis, Kenneth N and McGenity, Terry J and Hallsworth, John E (2015) Is there a common water-activity limit for the three domains of life? The ISME Journal, 9 (6). pp. 1333-1351. DOI https://doi.org/10.1038/ismej.2014.219
Stevenson, Andrew and Cray, Jonathan A and Williams, Jim P and Santos, Ricardo and Sahay, Richa and Neuenkirchen, Nils and McClure, Colin D and Grant, Irene R and Houghton, Jonathan DR and Quinn, John P and Timson, David J and Patil, Satish V and Singhal, Rekha S and Antón, Josefa and Dijksterhuis, Jan and Hocking, Ailsa D and Lievens, Bart and Rangel, Drauzio EN and Voytek, Mary A and Gunde-Cimerman, Nina and Oren, Aharon and Timmis, Kenneth N and McGenity, Terry J and Hallsworth, John E (2015) Is there a common water-activity limit for the three domains of life? The ISME Journal, 9 (6). pp. 1333-1351. DOI https://doi.org/10.1038/ismej.2014.219
Abstract
<jats:title>Abstract</jats:title> <jats:p>Archaea and Bacteria constitute a majority of life systems on Earth but have long been considered inferior to Eukarya in terms of solute tolerance. Whereas the most halophilic prokaryotes are known for an ability to multiply at saturated NaCl (water activity (aw) 0.755) some xerophilic fungi can germinate, usually at high-sugar concentrations, at values as low as 0.650–0.605 aw. Here, we present evidence that halophilic prokayotes can grow down to water activities of &lt;0.755 for Halanaerobium lacusrosei (0.748), Halobacterium strain 004.1 (0.728), Halobacterium sp. NRC-1 and Halococcus morrhuae (0.717), Haloquadratum walsbyi (0.709), Halococcus salifodinae (0.693), Halobacterium noricense (0.687), Natrinema pallidum (0.681) and haloarchaeal strains GN-2 and GN-5 (0.635 aw). Furthermore, extrapolation of growth curves (prone to giving conservative estimates) indicated theoretical minima down to 0.611 aw for extreme, obligately halophilic Archaea and Bacteria. These were compared with minima for the most solute-tolerant Bacteria in high-sugar (or other non-saline) media (Mycobacterium spp., Tetragenococcus halophilus, Saccharibacter floricola, Staphylococcus aureus and so on) and eukaryotic microbes in saline (Wallemia spp., Basipetospora halophila, Dunaliella spp. and so on) and high-sugar substrates (for example, Xeromyces bisporus, Zygosaccharomyces rouxii, Aspergillus and Eurotium spp.). We also manipulated the balance of chaotropic and kosmotropic stressors for the extreme, xerophilic fungi Aspergillus penicilloides and X. bisporus and, via this approach, their established water-activity limits for mycelial growth (∼0.65) were reduced to 0.640. Furthermore, extrapolations indicated theoretical limits of 0.632 and 0.636 aw for A. penicilloides and X. bisporus, respectively. Collectively, these findings suggest that there is a common water-activity limit that is determined by physicochemical constraints for the three domains of life.</jats:p>
Item Type: | Article |
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Uncontrolled Keywords: | Bacteria; Staphylococcus aureus; Fungi; Ascomycota; Aspergillus; Archaea; Halobacterium; Sodium Chloride; Water; Carbohydrates; Artifacts; Water Microbiology; Temperature; Hydrogen-Ion Concentration |
Subjects: | Q Science > QH Natural history > QH301 Biology Q Science > QR Microbiology |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Life Sciences, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 07 Jan 2015 16:41 |
Last Modified: | 07 Aug 2024 19:49 |
URI: | http://repository.essex.ac.uk/id/eprint/12184 |
Available files
Filename: ismej2014219a.pdf
Licence: Creative Commons: Attribution 3.0