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Diel transcriptional response of a California Current plankton microbiome to light, low iron, and enduring viral infection

Journal Article · · The ISME Journal
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [8];  [9];  [10];  [11];  [3]
  1. University of California, San Diego, CA (United States). Scripps Institution of Oceanography; J. Craig Venter Institute, La Jolla, CA (United States). Microbial and Environmental Genomics Group; DOE/OSTI
  2. J. Craig Venter Institute, La Jolla, CA (United States). Microbial and Environmental Genomics Group
  3. University of California, San Diego, CA (United States). Scripps Institution of Oceanography; J. Craig Venter Institute, La Jolla, CA (United States). Microbial and Environmental Genomics Group
  4. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Dept. of Biological Sciences
  5. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Civil and Environmental Engineering
  6. American University in Cairo, New Cairo (Egypt). Dept. of Biology and Biotechnology Graduate Program
  7. Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States). Dept. of Biological Sciences; Monterey Bay Aquarium Research Institute, Moss Landing, CA (United States)
  8. Monterey Bay Aquarium Research Institute, Moss Landing, CA (United States)
  9. University of California, San Diego, CA (United States). Scripps Institution of Oceanography
  10. GEOMAR Helmholtz Centre for Ocean Research, Kiel (Germany). Ocean EcoSystems Biology Unit
  11. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Civil and Environmental Engineering; University of Hawaii, Honolulu, HI (United States). Daniel K. Inouye Center for Microbial Oceanography: Research and Education (C-MORE)
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
Research Organization:
J. Craig Venter Inst., Inc., Rockville, MD (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0008593; SC0018344
OSTI ID:
1624026
Journal Information:
The ISME Journal, Journal Name: The ISME Journal Journal Issue: 11 Vol. 13; ISSN 1751-7362
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (5)

Metabolic and biogeochemical consequences of viral infection in aquatic ecosystems journal November 2019
Transcriptional patterns of Emiliania huxleyi in the North Pacific Subtropical Gyre reveal the daily rhythms of its metabolic potential journal November 2019
Resource conservation manifests in the genetic code journal November 2020
Resource conservation manifests in the genetic code text January 2020
Resource conservation manifests in the genetic code text January 2020

Figures / Tables (6)


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