Due to biocompatibility and
biodegradability of biologically-produced PHA for possible uses as
plastics with promising physical and chemical characteristics (e.g.,
can be changed by blending and/or modifying the surface), PHAs
could be applicable to be biodegradable polymers for green technology
of sustainable development [2].
As a matter of fact, several
naturally-occurring microbes were reported to have capabilities
of PHA biosynthesis (e.g., Azotobacter vinelandii [3], Pseudomonas
sp. [4] and Aeromonas sp. [5]).
Regarding the bacteria that generated
PHAs in different monomer compositions via diverse synthetic
pathways for fermentative production, Aeromonas hydrophila, Pseudomonas
aeruginosa and P. putida were often popularly studied
[4]. For example, wild-type and mutant strains of A. hydrophila
cultured at 4 or 8 g L−1 lauric acid could obtain 36–51 wt % and 46–69 wt% of high PHA contents, respectively [6,7].