Journal
ISME JOURNAL
Volume 6, Issue 7, Pages 1445-1448Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ismej.2011.207
Keywords
diatom; virus; pennate
Categories
Funding
- Ministry of Education, Science and Culture of Japan [22688016]
- Grants-in-Aid for Scientific Research [22688016] Funding Source: KAKEN
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Diatoms are considered the most successful and widespread group of photosynthetic eukaryotes. Their contribution to primary production is remarkably significant to the earth's ecosystems. Diatoms are composed of two orders: Centrales and Pennales. Thus far, viruses infecting centric diatom species have been isolated and characterized; however, viruses infecting pennates have not been reported. Here, we describe the first isolations and preliminary characterizations of two distinct pennate diatom viruses, AglaRNAV (31 nm in diameter, accumulates in the host cytoplasm) and TnitDNAV (35 nm in diameter, accumulates in the host nuclei) infecting Asterionellopsis glacialis and Thalassionema nitzschioides, respectively. Their genomes contain a single-stranded RNA of approximately 9.5 kb, and a closed, circular single-stranded DNA of approximately 5.5 kb harboring a partially double-stranded region, respectively. Further analysis of these viruses may elucidate many aspects of diatom host-virus relationships. The ISME Journal (2012) 6, 1445-1448; doi:10.1038/ismej.2011.207; published online 12 January 2012
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