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Viruses in the dark, deep ocean

Gian Marco Luna, Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche (CNR – ISMAR), Ancona (Italy)

Life in the largest ecosystem on the planet is dominated by microbes. In addition to cellular microbes, viruses constitute fundamental components of the deep sea biota, but the lack of viral isolates, coupled with the paucity of data on viral diversity, limits our knowledge about which viruses reside in the dark ocean, the phage/host interactions and the ecological role that viruses play. In this talk, I will summarize results of recent collaborative researches that investigated, by integrating culture-dependent and -independent approaches, the diversity, phage-host interaction and ecological role of deep-sea viruses. We assessed patterns in abundance and processes across the bathypelagic ocean, to demonstrate how important viruses are in the major pathways of carbon cycling. Also, we isolated and characterized the first phages from the deep sea, infecting one of the most abundant deep sea bacterium (Alteromonas), and mapped their genomes over a collection of oceanic viromes, to investigate their abundance across the ocean. Lastly, we produced a sequence dataset of 18 dsDNA viral-fraction bathypelagic metagenomes, to assess the diversity of populations, identify abundant and rare bathypelagic viruses, and make predictions of their hosts. Taken together, our results shed light on one of the most common phage/host interaction in the deep sea, provide the first laboratory models to better understand mechanisms of viral infection, and serve as foundational knowledge to comprehend more fully the ecological role by viruses in the deep ocean.

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Mission

L’Associazione Italiana di Oceanologia e Limnologia (AIOL) è stata fondata il 27 giugno 1972 per favorire, per mezzo di contatti scientifici, la collaborazione tra studiosi delle diverse discipline … Read More about Mission

Chi Siamo

Nel corso del XXV Congresso online (30 giugno – 2 luglio 2021) è stato eletto il nuovo Consiglio di Presidenza dell'AIOL Il nuovo CdP, costituito da Presidente, Vicepresidente e Consiglieri, rimarrà … Read More about Chi Siamo

Advances in Oceanography and Limnology

Advances in Oceanography and Limnology Advances in Oceanography and Limnology (AIOL Journal) is the official publication of the Italian Association of Limnology and Oceanology … Read More about Advances in Oceanography and Limnology

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