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Folia Microbiologica

, Volume 62, Issue 5, pp 409–416 | Cite as

Agar-degrading bacteria isolated from Antarctic macroalgae

  • Roxana Alvarado
  • Sergio LeivaEmail author
Article

Abstract

This study describes the taxonomic diversity of pigmented, agar-degrading bacteria isolated from the surface of macroalgae collected in King George Island, Antarctica. A total of 30 pigmented, agarolytic bacteria were isolated from the surface of the Antarctic macroalgae Adenocystis utricularis, Monostroma hariotii, Iridaea cordata, and Pantoneura plocamioides. Based on the 16S rRNA data, the agarolytic isolates were affiliated to the genera Algibacter, Arthrobacter, Brachybacterium, Cellulophaga, Citricoccus, Labedella, Microbacterium, Micrococcus, Salinibacterium, Sanguibacter, and Zobellia. Isolates phylogenetically related to Cellulophaga algicola showed the highest agarase activity in culture supernatants when tested at 4 and 37 °C. This is the first investigation of pigmented agar-degrading bacteria, members of microbial communities associated with Antarctic macroalgae, and the results suggest that they represent a potential source of cold-adapted agarases of possible biotechnological interest.

Keywords

Marine Agar Agarase Activity Colony Morphotypes Pigment Bacterium Antarctic Macroalgae 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

We thank the INACH staff at Station Prof. Julio Escudero for logistic support. Special thanks to Dr. Iván Gómez and his group (Project Anillo ART1101) for its valuable support during the field work. This study was supported by Grant RT_06-13 from the Instituto Antártico Chileno (INACH).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i. 2017

Authors and Affiliations

  1. 1.Instituto de Bioquímica & Microbiología, Facultad de CienciasUniversidad Austral de ChileValdiviaChile

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