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dc.contributor.authorChennu, Arjun
dc.contributor.authorGrinham, Alistair
dc.contributor.authorPolerecky, Lubos
dc.contributor.authorde Beer, Dirk
dc.contributor.authorAlnajjar, Mohammad Ahmad
dc.date.accessioned2016-01-05T07:34:29Z
dc.date.available2016-01-05T07:34:29Z
dc.date.issued2015-12-24
dc.identifier.citationRapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Mats 2015, 6 Frontiers in Microbiology
dc.identifier.issn1664-302X
dc.identifier.pmid26733996
dc.identifier.doi10.3389/fmicb.2015.01472
dc.identifier.urihttp://hdl.handle.net/10754/592818
dc.description.abstractDesiccated cyanobacterial mats are the dominant biological feature in the Earth’s arid zones. While the response of desiccated cyanobacteria to rehydration is well-documented for terrestrial systems, information about the response in marine systems is lacking. We used high temporal resolution hyperspectral imaging, liquid chromatography, pulse-amplitude fluorometry, oxygen microsensors, and confocal laser microscopy to study this response in a desiccated microbial mat from Exmouth Gulf, Australia. During the initial 15 min after rehydration chlorophyll a concentrations increased 2–5 fold and cyanobacterial photosynthesis was re-established. Although the mechanism behind this rapid increase of chlorophyll a remains unknown, we hypothesize that it involves resynthesis from a precursor stored in desiccated cyanobacteria. The subsequent phase (15 min–48 h) involved migration of the reactivated cyanobacteria toward the mat surface, which led, together with a gradual increase in chlorophyll a, to a further increase in photosynthesis. We conclude that the response involving an increase in chlorophyll a and recovery of photosynthetic activity within minutes after rehydration is common for cyanobacteria from desiccated mats of both terrestrial and marine origin. However, the response of upward migration and its triggering factor appear to be mat-specific and likely linked to other factors.
dc.language.isoen
dc.publisherFrontiers Media SA
dc.relation.urlhttp://journal.frontiersin.org/article/10.3389/fmicb.2015.01472
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.subjectcyanobacteria
dc.subjectdesiccation tolerance
dc.subjectrehydration
dc.subjectphotosynthesis
dc.subjectreactivation
dc.titleRapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Mats
dc.typeArticle
dc.contributor.departmentRed Sea Research Center (RSRC)
dc.identifier.journalFrontiers in Microbiology
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionMax Planck Institute for Marine Microbiology, Bremen, Germany
dc.contributor.institutionSchool of Civil Engineering, The University of Queensland, St. Lucia, QLD, Australia
dc.contributor.institutionDepartment of Earth Sciences, Utrecht University, Utrecht, Netherlands
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personAlnajjar, Mohammad Ahmad
refterms.dateFOA2018-06-13T13:18:50Z


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