2020
DOI: 10.1038/s41396-020-00793-x
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Combined pigment and metatranscriptomic analysis reveals highly synchronized diel patterns of phenotypic light response across domains in the open oligotrophic ocean

Abstract: Sunlight is the most important environmental control on diel fluctuations in phytoplankton activity, and understanding diel microbial processes is essential to the study of oceanic biogeochemical cycles. Yet, little is known about the in situ frequency of phytoplankton metabolic activities and their coordination across different populations. We investigated the diel orchestration of phytoplankton activity involved in photosynthesis, photoacclimation, and photoprotection by analyzing the pigment and quinone dis… Show more

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Cited by 32 publications
(38 citation statements)
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“…3A, Table S8), suggesting that these dinoflagellates were behaving as trophic specialists at the time of sampling despite their presumed capacity for mixotrophy. A similar phenomenon was observed with the five environmental prymnesiophyte bins, four of which also have the capacity for mixotrophy based on laboratory studies (50, 51). Chrysochromulina brevifilum was the only haptophyte species predominantly classified as a mixotroph at the time of sampling, all other prymnesiophytes were predicted to have behaved primarily as heterotrophs (2) or as phototrophs (2) when sampled.…”
Section: Resultssupporting
confidence: 77%
See 1 more Smart Citation
“…3A, Table S8), suggesting that these dinoflagellates were behaving as trophic specialists at the time of sampling despite their presumed capacity for mixotrophy. A similar phenomenon was observed with the five environmental prymnesiophyte bins, four of which also have the capacity for mixotrophy based on laboratory studies (50, 51). Chrysochromulina brevifilum was the only haptophyte species predominantly classified as a mixotroph at the time of sampling, all other prymnesiophytes were predicted to have behaved primarily as heterotrophs (2) or as phototrophs (2) when sampled.…”
Section: Resultssupporting
confidence: 77%
“…Finally, dictyophyte field predictions were consistent with MMETSP-derived labels: Rhizochromulina marina transcriptomes were classified as mixotrophic and Dictyocha speculum as a mixture of phototrophic and mixotrophic. The stability of predictions over day/night cycles despite known diel oscillations in transcript abundances (51) further indicated that our model leverages a wide array of transcriptional features when predicting nutritional mode. Overall, predictions of heterotrophy dominated when all predictions were aggregated over each individual 24 hr period ( n = 4) and prediction proportions remained stable over the diel period (Fig.…”
Section: Resultsmentioning
confidence: 84%
“…Genes associated with a wide variety of cellular processes also exhibit diel oscillations in transcript abundance, reflecting the capture of light energy and its conversion to chemical energy during daylight, a process that fuels metabolism over a 24-h period (22)(23)(24)(25)(26). Temporal partitioning of anabolism and catabolism creates diel patterns in total POC and in the macromolecular composition of POC (26)(27)(28)(29)(30)(31)(32)(33)(34).…”
mentioning
confidence: 99%
“…Available light decreases exponentially with depth, and longer wavelengths of light disappear within the first few meters ( 16 , 17 ). However, the marine microbial community is often highly synchronized to the day/night cycle ( 18 – 22 ), and studies on the different components of the circadian clock of model marine eukaryotic algal species are emerging ( 23 – 26 ). Eukaryotic marine planktonic communities are evolutionarily diverse with representative species from all major lineages across the eukaryotic tree of life ( 27 ) that adopted different lifestyles including photoautotrophy, mixotrophy, and heterotrophy.…”
mentioning
confidence: 99%