Prokaryotic Diversity in Zostera noltii -Colonized Marine Sediments

Author:

Cifuentes Ana1,Antón Josefa2,Benlloch Susana1,Donnelly Andrew3,Herbert Rodney A.3,Rodríguez-Valera Francisco1

Affiliation:

1. División de Microbiologı́a, Universidad Miguel Hernández, Campus de San Juan, 03550 San Juan, Alicante,1 and

2. División de Microbiologı́a, Departamento de Fisiologı́a, Genética y Microbiologı́a, Universidad de Alicante, 03080 Alicante,2 Spain, and

3. Department of Biological Sciences, University of Dundee, Dundee DD1 4HN, United Kingdom3

Abstract

ABSTRACT 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 δ- Proteobacteria related to sulfate-reducing bacteria. The second most abundant group (27%) was γ- 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.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

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