M. Usha Rani1, Arundhathi2 and Gopal Reddy3
1Principal Investigator, Department of Science and Technology (DST), "Women Scientists Scheme WOS, A, JNTUK, Kakinada, India.
2Department of Botany, Andhra University, Visakhapatnam, India.
3Department of Microbiology, Osmania University, Hyderabad, India.
