Diel transcriptional response of a California Current plankton microbiome to light, low iron, and enduring viral infection
Funding Number
DGE-1144086
Author's Department
Biology Department
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http://oceanrep.geomar.de/50026/1/s41396-019-0472-2.pdf
Document Type
Research Article
Publication Title
ISME Journal
Publication Date
11-1-2019
doi
10.1038/s41396-019-0472-2
Abstract
Phytoplankton and associated microbial communities provide organic carbon to oceanic food webs and drive ecosystem dynamics. However, capturing those dynamics is challenging. Here, an in situ, semi-Lagrangian, robotic sampler profiled pelagic microbes at 4 h intervals over ~2.6 days in North Pacific high-nutrient, low-chlorophyll waters. We report on the community structure and transcriptional dynamics of microbes in an operationally large size class (>5 μm) predominantly populated by dinoflagellates, ciliates, haptophytes, pelagophytes, diatoms, cyanobacteria (chiefly Synechococcus), prasinophytes (chiefly Ostreococcus), fungi, archaea, and proteobacteria. Apart from fungi and archaea, all groups exhibited 24-h periodicity in some transcripts, but larger portions of the transcriptome oscillated in phototrophs. Periodic photosynthesis-related transcripts exhibited a temporal cascade across the morning hours, conserved across diverse phototrophic lineages. Pronounced silica:nitrate drawdown, a high flavodoxin to ferredoxin transcript ratio, and elevated expression of other Fe-stress markers indicated Fe-limitation. Fe-stress markers peaked during a photoperiodically adaptive time window that could modulate phytoplankton response to seasonal Fe-limitation. Remarkably, we observed viruses that infect the majority of abundant taxa, often with total transcriptional activity synchronized with putative hosts. Taken together, these data reveal a microbial plankton community that is shaped by recycled production and tightly controlled by Fe-limitation and viral activity.
First Page
2817
Last Page
2833
Recommended Citation
APA Citation
Moustafa, A.
(2019). Diel transcriptional response of a California Current plankton microbiome to light, low iron, and enduring viral infection. ISME Journal, 13(11), 2817–2833.
10.1038/s41396-019-0472-2
https://fount.aucegypt.edu/faculty_journal_articles/169
MLA Citation
Moustafa, Ahmed
"Diel transcriptional response of a California Current plankton microbiome to light, low iron, and enduring viral infection." ISME Journal, vol. 13,no. 11, 2019, pp. 2817–2833.
https://fount.aucegypt.edu/faculty_journal_articles/169