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Title: Transcriptional responses of the marine green alga Micromonas pusilla and an infecting prasinovirus under different phosphate conditions

Abstract

Prasinophytes are widespread marine algae for which responses to nutrient limitation and viral infection are not well understood. We studied the picoprasinophyte, Micromonas pusilla, grown under phosphate-replete (0.65 ± 0.07 d-1) and 10-fold lower (low)-phosphate (0.11 ± 0.04 d-1) conditions, and infected by the phycodnavirus MpV-SP1. Expression of 17% of Micromonas genes in uninfected cells differed by >1.5-fold (q < 0.01) between nutrient conditions, with genes for P-metabolism and the uniquely-enriched Sel1-like repeat (SLR) family having higher relative transcript abundances, while phospholipid-synthesis genes were lower in low-P than P-replete. Approximately 70% (P-replete) and 30% (low-P) of cells were lysed 24 h post-infection, and expression of ≤5.8% of host genes changed relative to uninfected treatments. Host genes for CAZymes and glycolysis were activated by infection, supporting importance in viral production, which was significantly lower in slower growing (low-P) hosts. All MpV-SP1 genes were expressed, and our analyses suggest responses to differing host-phosphate backgrounds involve few viral genes, while the temporal program of infection involves many more, and is largely independent of host-phosphate background. Our study (i) identifies genes previously unassociated with nutrient acclimation or viral infection, (ii) provides insights into the temporal program of prasinovirus gene expression by hosts and (iii)more » establishes cell biological aspects of an ecologically important host-prasinovirus system that differ from other marine algal-virus systems« less

Authors:
 [1];  [2];  [3];  [3];  [4];  [4];  [1];  [5];  [6];  [7]
  1. Monterey Bay Aquarium Research Institute, Moss Landing, CA (United States)
  2. Univ. of British Columbia, Vancouver, BC (Canada); Oregon Health & Science Univ., Portland, OR (United States)
  3. Univ. of British Columbia, Vancouver, BC (Canada)
  4. Joint Genome Institute, Walnut Creek, CA (United States)
  5. Univ. of Chicago, Chicago, IL (United States)
  6. Univ. of British Columbia, Vancouver, BC (Canada); Canadian Institute for Advanced Research, Toronto (Canada)
  7. Monterey Bay Aquarium Research Institute, Moss Landing, CA (United States); Canadian Institute for Advanced Research, Toronto (Canada)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1529112
Grant/Contract Number:  
SC0004765
Resource Type:
Accepted Manuscript
Journal Name:
Environmental Microbiology
Additional Journal Information:
Journal Volume: 20; Journal Issue: 8; Journal ID: ISSN 1462-2912
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Bachy, Charles, Charlesworth, Christina J., Chan, Amy M., Finke, Jan F., Wong, Chee -Hong, Wei, Chia -Lin, Sudek, Sebastian, Coleman, Maureen L., Suttle, Curtis A., and Worden, Alexandra Z. Transcriptional responses of the marine green alga Micromonas pusilla and an infecting prasinovirus under different phosphate conditions. United States: N. p., 2018. Web. doi:10.1111/1462-2920.14273.
Bachy, Charles, Charlesworth, Christina J., Chan, Amy M., Finke, Jan F., Wong, Chee -Hong, Wei, Chia -Lin, Sudek, Sebastian, Coleman, Maureen L., Suttle, Curtis A., & Worden, Alexandra Z. Transcriptional responses of the marine green alga Micromonas pusilla and an infecting prasinovirus under different phosphate conditions. United States. doi:10.1111/1462-2920.14273.
Bachy, Charles, Charlesworth, Christina J., Chan, Amy M., Finke, Jan F., Wong, Chee -Hong, Wei, Chia -Lin, Sudek, Sebastian, Coleman, Maureen L., Suttle, Curtis A., and Worden, Alexandra Z. Fri . "Transcriptional responses of the marine green alga Micromonas pusilla and an infecting prasinovirus under different phosphate conditions". United States. doi:10.1111/1462-2920.14273. https://www.osti.gov/servlets/purl/1529112.
@article{osti_1529112,
title = {Transcriptional responses of the marine green alga Micromonas pusilla and an infecting prasinovirus under different phosphate conditions},
author = {Bachy, Charles and Charlesworth, Christina J. and Chan, Amy M. and Finke, Jan F. and Wong, Chee -Hong and Wei, Chia -Lin and Sudek, Sebastian and Coleman, Maureen L. and Suttle, Curtis A. and Worden, Alexandra Z.},
abstractNote = {Prasinophytes are widespread marine algae for which responses to nutrient limitation and viral infection are not well understood. We studied the picoprasinophyte, Micromonas pusilla, grown under phosphate-replete (0.65 ± 0.07 d-1) and 10-fold lower (low)-phosphate (0.11 ± 0.04 d-1) conditions, and infected by the phycodnavirus MpV-SP1. Expression of 17% of Micromonas genes in uninfected cells differed by >1.5-fold (q < 0.01) between nutrient conditions, with genes for P-metabolism and the uniquely-enriched Sel1-like repeat (SLR) family having higher relative transcript abundances, while phospholipid-synthesis genes were lower in low-P than P-replete. Approximately 70% (P-replete) and 30% (low-P) of cells were lysed 24 h post-infection, and expression of ≤5.8% of host genes changed relative to uninfected treatments. Host genes for CAZymes and glycolysis were activated by infection, supporting importance in viral production, which was significantly lower in slower growing (low-P) hosts. All MpV-SP1 genes were expressed, and our analyses suggest responses to differing host-phosphate backgrounds involve few viral genes, while the temporal program of infection involves many more, and is largely independent of host-phosphate background. Our study (i) identifies genes previously unassociated with nutrient acclimation or viral infection, (ii) provides insights into the temporal program of prasinovirus gene expression by hosts and (iii) establishes cell biological aspects of an ecologically important host-prasinovirus system that differ from other marine algal-virus systems},
doi = {10.1111/1462-2920.14273},
journal = {Environmental Microbiology},
number = 8,
volume = 20,
place = {United States},
year = {2018},
month = {5}
}

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