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Applied and Environmental Microbiology, April 2000, p. 1715-1719, Vol. 66, No. 4
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Prokaryotic Diversity in Zostera noltii-Colonized Marine Sediments

Ana Cifuentes,1 Josefa Antón,2,* Susana Benlloch,1 Andrew Donnelly,3 Rodney A. Herbert,3 and Francisco Rodríguez-Valera1

División de Microbiología, Universidad Miguel Hernández, Campus de San Juan, 03550 San Juan, Alicante,1 and División de Microbiología, Departamento de Fisiología, Genética y Microbiología, Universidad de Alicante, 03080 Alicante,2 Spain, and Department of Biological Sciences, University of Dundee, Dundee DD1 4HN, United Kingdom3

Received 29 October 1999/Accepted 25 January 2000

The diversity of microorganisms present in a sediment colonized by the phanerogam Zostera noltii has been analyzed. Microbial DNA was extracted and used for constructing two 16S rDNA clone libraries for Bacteria and Archaea. Bacterial diversity was very high in these samples, since 57 different sequences were found among the 60 clones analyzed. Eight major lineages of the Domain Bacteria were represented in the library. The most frequently retrieved bacterial group (36% of the clones) was delta -Proteobacteria related to sulfate-reducing bacteria. The second most abundant group (27%) was gamma -Proteobacteria, including five clones closely related to S-oxidizing endosymbionts. The archaeal clone library included members of Crenarchaeota and Euryarchaeota, with nine different sequences among the 15 analyzed clones, indicating less diversity when compared to the Bacteria organisms. None of these sequences was closely related to cultured Archaea organisms.

* Corresponding author. Mailing address: División de Microbiología, Departamento de Fisiología, Genética y Microbiología, Universidad de Alicante, Apto. 99, San Vicente del Raspeig, 03080 Alicante, Spain. Phone: 965903870. Fax: 965909494. E-mail: anton{at}ua.es.

Applied and Environmental Microbiology, April 2000, p. 1715-1719, Vol. 66, No. 4
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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