Rapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Mats

Handle URI:
http://hdl.handle.net/10754/592818
Title:
Rapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Mats
Authors:
Chennu, Arjun; Grinham, Alistair; Polerecky, Lubos; de Beer, Dirk; Alnajjar, Mohammad Ahmad ( 0000-0003-4861-1604 )
Abstract:
Desiccated 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.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Rapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Mats 2015, 6 Frontiers in Microbiology
Publisher:
Frontiers Media SA
Journal:
Frontiers in Microbiology
Issue Date:
24-Dec-2015
DOI:
10.3389/fmicb.2015.01472
Type:
Article
ISSN:
1664-302X
Additional Links:
http://journal.frontiersin.org/article/10.3389/fmicb.2015.01472
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorChennu, Arjunen
dc.contributor.authorGrinham, Alistairen
dc.contributor.authorPolerecky, Lubosen
dc.contributor.authorde Beer, Dirken
dc.contributor.authorAlnajjar, Mohammad Ahmaden
dc.date.accessioned2016-01-05T07:34:29Zen
dc.date.available2016-01-05T07:34:29Zen
dc.date.issued2015-12-24en
dc.identifier.citationRapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Mats 2015, 6 Frontiers in Microbiologyen
dc.identifier.issn1664-302Xen
dc.identifier.doi10.3389/fmicb.2015.01472en
dc.identifier.urihttp://hdl.handle.net/10754/592818en
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.en
dc.language.isoenen
dc.publisherFrontiers Media SAen
dc.relation.urlhttp://journal.frontiersin.org/article/10.3389/fmicb.2015.01472en
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.en
dc.subjectcyanobacteriaen
dc.subjectdesiccation toleranceen
dc.subjectrehydrationen
dc.subjectphotosynthesisen
dc.subjectreactivationen
dc.titleRapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Matsen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalFrontiers in Microbiologyen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionMax Planck Institute for Marine Microbiology, Bremen, Germanyen
dc.contributor.institutionSchool of Civil Engineering, The University of Queensland, St. Lucia, QLD, Australiaen
dc.contributor.institutionDepartment of Earth Sciences, Utrecht University, Utrecht, Netherlandsen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorAlnajjar, Mohammad Ahmaden
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