D.T. Petkova*, D.Sp. Mihaylova Department of Biotechnology, Technological Faculty, University of Food Technologies, 4002 Plovdiv, Bulgaria (Manuscript received 3 June 2021; accepted for publication 21 July 2021) Abstract. The plant kingdom with its natural products, both terrestrial a

K. Kuti1, I.M. Hussaini1*, A. Usman2, A. Isa1 1Department of Microbiology, Faculty of Life Sciences, Ahmadu Bello University, Zaria, Nigeria 2Department of Microbiology, Faculty of Science, Kaduna State University, Kaduna, Nigeria (Manuscript received 24 December 2020; accepted for pu