Table of Contents
ISRN Bacteriology
Volume 2013, Article ID 562014, 12 pages
Research Article

Rapid Identification of Polyhydroxyalkanoate Accumulating Members of Bacillales Using Internal Primers for phaC Gene of Bacillus megaterium

1Department of Microbiology, Goa University, Taleigao Plateau, Goa 403206, India
2National Institute of Malaria Research, Field Station, DHS Building, Campal, Panaji, Goa 403001, India

Received 16 April 2013; Accepted 5 June 2013

Academic Editors: D. A. Bazylinski, G. Nychas, and A. Poli

Copyright © 2013 Pramoda Kumar Nayak et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Bacillus megaterium is gaining recognition as an experimental model and biotechnologically important microorganism. Recently, descriptions of new strains of B. megaterium and closely related species isolated from diverse habitats have increased. Therefore, its identification requires several tests in combination which is usually time consuming and difficult to do. We propose using the uniqueness of the polyhydroxyalkanoate synthase C gene of B. megaterium in designing primers that amplify the 0.9 kb region of the phaC for its identification. The PCR method was optimized to amplify 0.9 kb region of phaC gene. After optimization of the PCR reaction, two methods were investigated in detail. Method I gave an amplification of a single band of 0.9 kb only in B. megaterium and was demonstrated by several strains of B. megaterium isolated from different habitats. The use of Method I did not result in the amplification of the phaC gene with other members of Bacillales. The specificity for identification of B. megaterium was confirmed using sequencing of amplicon and RT-PCR. Method II showed multiple banding patterns of nonspecific amplicons among polyhydroxyalkanoate accumulating members of Bacillales unique to the respective species. These methods are rapid and specific for the identification of polyhydroxyalkanoate accumulating B. megaterium and members of Bacillales.