Rapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Mats
KAUST DepartmentRed Sea Research Center (RSRC)
Permanent link to this recordhttp://hdl.handle.net/10754/592818
MetadataShow full item record
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.
CitationRapid Reactivation of Cyanobacterial Photosynthesis and Migration upon Rehydration of Desiccated Marine Microbial Mats 2015, 6 Frontiers in Microbiology
PublisherFrontiers Media SA
JournalFrontiers in Microbiology
- Photochemical changes during rehydration of an intertidal cyanobacterial mat exposed to variations in salinity and light intensity.
- Authors: Fleming ED, Bebout BM, Castenholz RW
- Issue date: 2021 Aug
- Lipid biomarkers, pigments and cyanobacterial diversity of microbial mats across intertidal flats of the arid coast of the Arabian Gulf (Abu Dhabi, UAE).
- Authors: Abed RM, Kohls K, Schoon R, Scherf AK, Schacht M, Palinska KA, Al-Hassani H, Hamza W, Rullkötter J, Golubic S
- Issue date: 2008 Sep
- Rapid recovery of cyanobacterial pigments in desiccated biological soil crusts following addition of water.
- Authors: Abed RM, Polerecky L, Al-Habsi A, Oetjen J, Strous M, de Beer D
- Issue date: 2014
- Correlation of bio-optical properties with photosynthetic pigment and microorganism distribution in microbial mats from Hamelin Pool, Australia.
- Authors: Fisher A, Wangpraseurt D, Larkum AWD, Johnson M, Kühl M, Chen M, Wong HL, Burns BP
- Issue date: 2019 Jan 1
- Desiccation tolerance in the moss Polytrichum formosum: physiological and fine-structural changes during desiccation and recovery.
- Authors: Proctor MC, Ligrone R, Duckett JG
- Issue date: 2007 Jan