Molecular Biotechnology

, Volume 30, Issue 1, pp 51–55 | Cite as

Method for recovery of intact DNA for community analysis of marine intertidal microbial biofilms

  • José A. Narváez-Zapata
  • Norma Rodríguez-Ávila
  • Benjamín O. Ortega-Morales
Research Protocol


A protocol is described for rapid DNA isolation from marine biofilm microorganisms embedded in large amounts of exopolysaccharides. The method is a modification of the hot phenol protocol used for plants tissues, where nonexpensive and easily available enzymes were used. The method is based on the incubation of biofilm biomass samples in an extraction buffer mixed with phenol preheated at 65°C. The procedure can be completed in 2 h and up to 20 samples can be processed simultaneously with ease and DNA of excellent quality, as shown by successfully amplification of polymerase chain reaction (PCR) products. DNA was recovered from a range of intertidal marine biofilms with varying amounts of exopolysaccharides.

Index Entries

DNA extraction marine biofilms microbial community hot phenol exopolysaccharides 


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Copyright information

© Humana Press Inc. 2005

Authors and Affiliations

  • José A. Narváez-Zapata
    • 1
  • Norma Rodríguez-Ávila
  • Benjamín O. Ortega-Morales
  1. 1.Departmento de Microbiologá Ambiental y Biotecnol ogá, Programa de Corrosión del Golfo de MéxicoUniversidad Autónoma de CampecheCampecheMéxico

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