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- W2955792356 abstract "As an adaptation to the daily light-dark (diel) cycle, cyanobacteria exhibit diurnal rhythms of gene expression and cell cycle. The light-dark cycle also affects the life cycle of viruses (cyanophages) that infect the unicellular picocyanobacteria Prochlorococcus and Synechococcus, which are the major primary producers in the oceans. For example, the adsorption of some cyanophages to the host cells depends on light, and the burst sizes of cyanophages are positively correlated to the length of light exposure during infection. Recent metatranscriptomic studies revealed transcriptional rhythms of field cyanophage populations. However, the underlying mechanism remains to be determined, as cyanophage laboratory cultures have not been shown to exhibit diurnal transcriptional rhythms. Here, we studied variation in infection patterns and gene expression of Prochlorococcus phages in laboratory culture conditions as a function of light. We found three distinct diel-dependent life history traits in dark conditions (diel traits): no adsorption (cyanophage P-HM2), adsorption but no replication (cyanophage P-SSM2), and replication (cyanophage P-SSP7). Under light-dark cycles, each cyanophage exhibited rhythmic transcript abundance, and cyanophages P-HM2 and P-SSM2 also exhibited rhythmic adsorption patterns. Finally, we show evidence to link the diurnal transcriptional rhythm of cyanophages to the photosynthetic activity of the host, thus providing a mechanistic explanation for the field observations of cyanophage transcriptional rhythms. Our study identifies that cultured viruses can exhibit diurnal rhythms during infection, which might impact cyanophage population-level dynamics in the oceans." @default.
- W2955792356 created "2019-07-12" @default.
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- W2955792356 date "2019-06-24" @default.
- W2955792356 modified "2023-10-14" @default.
- W2955792356 title "Cyanobacterial viruses exhibit diurnal rhythms during infection" @default.
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- W2955792356 doi "https://doi.org/10.1073/pnas.1819689116" @default.
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