Plastic materials which are indispensable in every sphere of human life is causing serious environmental problems due to their non biodegradable nature. They are durable, resistant to degradation which results in environmental and waste management problem (Porier et al., 1995). In order to find alternative material, researches on the biodegradable plastics such as polyhydroxyalkanoates (PHAs) has drawn academic and industrial attention. PHAs are biodegradable polymers of microbial origin with thermoplastic properties and resemble synthetic polymers to a larger extent.