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Applied and Environmental Microbiology, November 2005, p. 7523-7527, Vol. 71, No. 11
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.11.7523-7527.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Distribution, Localization, and Phylogeny of Abundant Populations of Crenarchaeota in Anaerobic Granular Sludge

Gavin Collins,1 Leanne O'Connor,1,{dagger} Thérèse Mahony,1 Armin Gieseke,2 Dirk de Beer,2 and Vincent O'Flaherty1*

Microbial Ecology Laboratory, Department of Microbiology and Environmental Change Institute, National University of Ireland, Galway, University Road, Galway, Ireland,1 Microsensors Group, Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, D-28359 Bremen, Germany2

Received 28 April 2005/ Accepted 14 July 2005

Eight anaerobic granular sludges were surveyed for Crenarchaeota using rRNA gene cloning. Microbial arrangement and substrate uptake patterns were elucidated by fluorescent in situ hybridization and beta imaging. Group 1.3 Crenarchaeota represented up to 50% of Archaea and 25% of the total microbiota in five sludges. Crenarchaeota were localized in close association with methanogenic Archaea.

* Corresponding author. Mailing address: Microbial Ecology Laboratory, Department of Microbiology and Environmental Change Institute (ECI), National University of Ireland, Galway, University Road, Galway, Ireland. Phone: 353 (0) 91 493734. Fax: 353 (0) 91 525700. E-mail: vincent.oflaherty{at}nuigalway.ie.

{dagger} Present address: Microbiology Research Unit, Department of Oral Medicine and Oral Pathology, School of Dental Science and Dublin Dental Hospital, Trinity College, Dublin, Ireland.

Applied and Environmental Microbiology, November 2005, p. 7523-7527, Vol. 71, No. 11
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.11.7523-7527.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.





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