Third release of the plant rDNA database with updated content and information on telomere composition and sequenced plant genomes
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Here we present the third release of the plant rDNA database (March 2017), an open access online resource with information on numbers, locations and structure of 5S and 18S-5.8S-26S (35S) ribosomal DNA (rDNA) (www.plantrdnadatabase.com). Data are now available for 2148 species (3783 entries), extracted from 785 papers published until the end of 2016. This means an expansion of 33.5% in terms of new species and 13% in new publications consulted. We appreciate an increased interest on rDNA loci research in recent years, since 10.78% of all data available were published only in 2016. The database has been expanded to include information on telomere composition and on species whose genome has been fully sequenced up to date. Telomere sequence is only known with certainty for 9.60% of species in the database and for 36.79% at the genus level, indicating, potentially, that the consensus plant telomere (Arabidopsis-type) might not be as extended as previously thought. We have also introduced the taxonomic category order as an additional option for data browsing. Similarly, we have included a new category to indicate the hybrid status of taxa. In addition, we upgraded and/or proofread tabs and links and slightly modified the website for a more dynamic appearance. This manuscript provides a synopsis of these changes and developments.
Keywords5S 35S Chromosome Karyotype Sequenced plant genomes Telomere
We thank Karina Barros and Maria Pilar Alonso-Lifante, librarians of the IBB-CSIC-ICUB, for their help in publication search. The Dirección General de Investigación Científica y Técnica from the Government of Spain (CGL2016-75694-P), the Czech Science Foundation (P506/16/02149 J) and the Government of Catalonia (“Ajuts a grups de recerca consolidats”, 2014SGR514) are acknowledged for funding. Sònia Garcia benefits from a “Ramón y Cajal” contract from the Government of Spain (RYC-2014-16608).
Compliance with ethical standards
Conflict of interest
The authors declare that has no conflict of interest.
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