This genus seems to be a potential candidate for the
production of PHB due to its better polymer yields and
less severe fermentation conditions (Thirumala et al.
2010). It is still being widely studied not only because new
species with new properties are still appearing (Halami
2008; Rodr ıguez-Contreras et al. 2013), but also because
Bacillus is used for the production of a variety of different
PHAs by utilizing different carbon sources (Thirumala
et al. 2010). Among the new PHAs-producing Bacillus,a
wild-type strain of Bacillus megaterium was recently iso-
lated from extreme saline environments (Rodr ıguez-
Contreras et al. 2013). This novel strain grew well in a
conventional medium with low salt content as typically
used for industrial production of PHAs. Taking this into
account, the main objectives of this new work were to
study the maximal PHB production potential of B. mega-
terium strain uyuni S-29 in the conventional media used
for industrial biopolymer production and the possibility that the strain accumulates different types of PHAs. The
characterization of the produced biopolymers and the
examination of the cellular morphology during the
biosynthesis process were further objectives of this study.