Abstract
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 79:79-83 (2017) - DOI: https://doi.org/10.3354/ame01818 NOTE Effects of temperature and salinity on diatom cell lysis by DNA and RNA viruses Kei Kimura1,**, Yuji Tomaru2,*,** 1Institute of Lowland and Marine Research, Saga University, Honjo-machi 1, Saga 840-8502, Japan 2National Research Institute of Fisheries and Environment of Inland Sea, Japan Fisheries Research and Education Agency, 2-17-5 Maruishi, Hatsukaichi, Hiroshima 739-0452, Japan *Corresponding author: tomaruy@affrc.go.jp**The authors contributed equally to this work ABSTRACT: In estuarine and coastal environments, microbes are exposed to significant changes in the environment within short time periods. To examine the effects of water temperature and salinity on host-virus interactions, we used 2 strains of the marine planktonic diatom Chaetoceros tenuissimus and 4 viruses that exhibit contrasting host specificities. We found that the time necessary for a given virus to lyse half the diatoms within a culture (CR50), measured as the number of days required for chlorophyll a fluorescence intensity of host cells to decrease by >50%, was significantly affected by changes in both water temperature and salinity. In several host-virus combinations, environmental suitability for the growth of the host and the CR50 of the virus were significantly correlated, but no correlation was observed for other combinations. The CR50 values for different viral strains varied significantly depending on the combination of temperature and salinity tested. Moreover, optimum conditions for host cell lysis were highly diverse among virus species and isolates. The varied environmental optima of viruses might allow them to partition use of the same host species in natural environments. KEY WORDS: Water temperature · Water salinity · Host-virus interactions · Diatom lysis Full text in pdf format Supplementary material PreviousCite this article as: Kimura K, Tomaru Y (2017) Effects of temperature and salinity on diatom cell lysis by DNA and RNA viruses. Aquat Microb Ecol 79:79-83. https://doi.org/10.3354/ame01818 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 79, No. 1. Online publication date: April 13, 2017 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2017 Inter-Research.
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