Temperature Responses of Heterotrophic Bacteria in Co-culture With a Red Sea Synechococcus Strain
Palacio, Antonio S.
García, Francisca C.
Hadaidi, Ghaida A.
Ansari, Mohd Ikram
Moran, Xose Anxelu G.
KAUST DepartmentBiological and Environmental Science and Engineering (BESE) Division
Environmental Microbial Safety and Biotechnology Lab
Environmental Science and Engineering Program
Marine Science Program
Microbial oceanography Research Group
Red Sea Research Center (RSRC)
Water Desalination and Reuse Research Center (WDRC)
Permanent link to this recordhttp://hdl.handle.net/10754/669159
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AbstractInteractions between autotrophic and heterotrophic bacteria are fundamental for marine biogeochemical cycling. How global warming will affect the dynamics of these essential microbial players is not fully understood. The aims of this study were to identify the major groups of heterotrophic bacteria present in a Synechococcus culture originally isolated from the Red Sea and assess their joint responses to experimental warming within the metabolic ecology framework. A co-culture of Synechococcus sp. RS9907 and their associated heterotrophic bacteria, after determining their taxonomic affiliation by 16S rRNA gene sequencing, was acclimated and maintained in the lab at different temperatures (24–34°C). The abundance and cellular properties of Synechococcus and the three dominant heterotrophic bacterial groups (pertaining to the genera Paracoccus, Marinobacter, and Muricauda) were monitored by flow cytometry. The activation energy of Synechococcus, which grew at 0.94–1.38 d–1, was very similar (0.34 ± 0.02 eV) to the value hypothesized by the metabolic theory of ecology (MTE) for autotrophs (0.32 eV), while the values of the three heterotrophic bacteria ranged from 0.16 to 1.15 eV and were negatively correlated with their corresponding specific growth rates (2.38–24.4 d–1). The corresponding carrying capacities did not always follow the inverse relationship with temperature predicted by MTE, nor did we observe a consistent response of bacterial cell size and temperature. Our results show that the responses to future ocean warming of autotrophic and heterotrophic bacteria in microbial consortia might not be well described by theoretical universal rules.
CitationLabban, A., Palacio, A. S., García, F. C., Hadaidi, G., Ansari, M. I., López-Urrutia, Á., … Morán, X. A. G. (2021). Temperature Responses of Heterotrophic Bacteria in Co-culture With a Red Sea Synechococcus Strain. Frontiers in Microbiology, 12. doi:10.3389/fmicb.2021.612732
SponsorsThis project was supported by the King Abdullah University of Science and Technology (KAUST) through the research baseline funding provided to XAGM.
We acknowledge the Spanish Ministry of Economy and Competitiveness (MINECO) to support LA-S with a Ramón y Cajal research contract (RYC-2012-11404), AP with a FPI Ph.D. fellowship and funding the Retos project TECCAM (CTM2014-58564-R). We would like to thank Dr. Tamara M. Huete-Stauffer for her assistance in the sampling and technical support and Eman Sabbagh for her assistance in the sampling. We would like also to thank KAUST Bioscience Core Lab (BCL) for sequencing.
PublisherFrontiers Media SA
JournalFrontiers in Microbiology
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