African Journal of Biotechnology Volume 12 Number 42, 16 October, 2013 ISSN 1684-5315 ABOUT AJB The African Journal of Biotechnology (AJB) (ISSN 1684-5315) is published weekly (one volume per year) by Academic Journals. African Journal of Biotechnology (AJB), a new broad-based journal, is an open access journal that was founded on two key tenets: To publish the most exciting research in all areas of applied biochemistry, industrial microbiology, molecular biology, genomics and proteomics, food and agricultural technologies, and metabolic engineering. Secondly, to provide the most rapid turn-around time possible for reviewing and publishing, and to disseminate the articles freely for teaching and reference purposes. All articles published in AJB are peer- reviewed. Submission of Manuscript Please read the Instructions for Authors before submitting your manuscript. The manuscript files should be given the last name of the first author Click here to Submit manuscripts online If you have any difficulty using the online submission system, kindly submit via this email [email protected]. With questions or concerns, please contact the Editorial Office at [email protected]. Editor-In-Chief Associate Editors George Nkem Ude, Ph.D Prof. Dr. AE Aboulata Plant Breeder & Molecular Biologist Plant Path. Res. Inst., ARC, POBox 12619, Giza, Egypt Department of Natural Sciences 30 D, El-Karama St., Alf Maskan, P.O. Box 1567, Crawford Building, Rm 003A Ain Shams, Cairo, Bowie State University Egypt 14000 Jericho Park Road Bowie, MD 20715, USA Dr. S.K Das Department of Applied Chemistry and Biotechnology, University of Fukui, Japan Editor Prof. Okoh, A. I. N. John Tonukari, Ph.D Applied and Environmental Microbiology Research Department of Biochemistry Group (AEMREG), Delta State University Department of Biochemistry and Microbiology, PMB 1 University of Fort Hare. Abraka, Nigeria P/Bag X1314 Alice 5700, South Africa Dr. Ismail TURKOGLU Department of Biology Education, Education Faculty, Fırat University, Elazığ, Turkey Prof T.K.Raja, PhD FRSC (UK) Department of Biotechnology PSG COLLEGE OF TECHNOLOGY (Autonomous) (Affiliated to Anna University) Coimbatore-641004, Tamilnadu, INDIA. Dr. George Edward Mamati Horticulture Department, Jomo Kenyatta University of Agriculture and Technology, P. O. Box 62000-00200, Nairobi, Kenya. Dr. Gitonga Kenya Agricultural Research Institute, National Horticultural Research Center, P.O Box 220, Thika, Kenya. Editorial Board Prof. Sagadevan G. Mundree Dr. E. Olatunde Farombi Department of Molecular and Cell Biology Drug Metabolism and Toxicology Unit University of Cape Town Department of Biochemistry Private Bag Rondebosch 7701 University of Ibadan, Ibadan, Nigeria South Africa Dr. Stephen Bakiamoh Dr. Martin Fregene Michigan Biotechnology Institute International Centro Internacional de Agricultura Tropical (CIAT) 3900 Collins Road Km 17 Cali-Palmira Recta Lansing, MI 48909, USA AA6713, Cali, Colombia Dr. N. A. Amusa Prof. O. A. Ogunseitan Institute of Agricultural Research and Training Laboratory for Molecular Ecology Obafemi Awolowo University Department of Environmental Analysis and Design Moor Plantation, P.M.B 5029, Ibadan, Nigeria University of California, Irvine, CA 92697-7070. USA Dr. Desouky Abd-El-Haleem Environmental Biotechnology Department & Dr. Ibrahima Ndoye Bioprocess Development Department, UCAD, Faculte des Sciences et Techniques Genetic Engineering and Biotechnology Research Departement de Biologie Vegetale Institute (GEBRI), BP 5005, Dakar, Senegal. Mubarak City for Scientific Research and Technology Laboratoire Commun de Microbiologie Applications, IRD/ISRA/UCAD New Burg-Elarab City, Alexandria, Egypt. BP 1386, Dakar Dr. Simeon Oloni Kotchoni Dr. Bamidele A. Iwalokun Department of Plant Molecular Biology Biochemistry Department Institute of Botany, Kirschallee 1, Lagos State University University of Bonn, D-53115 Germany. P.M.B. 1087. Apapa – Lagos, Nigeria Dr. Eriola Betiku Dr. Jacob Hodeba Mignouna German Research Centre for Biotechnology, Associate Professor, Biotechnology Biochemical Engineering Division, Virginia State University Mascheroder Weg 1, D-38124, Agricultural Research Station Box 9061 Braunschweig, Germany Petersburg, VA 23806, USA Dr. Bright Ogheneovo Agindotan Dr. Daniel Masiga Plant, Soil and Entomological Sciences Dept International Centre of Insect Physiology and University of Idaho, Moscow Ecology, ID 83843, USA Nairobi, Kenya Dr. A.P. Njukeng Département de Biologie Végétale Dr. Essam A. Zaki Faculté des Sciences Genetic Engineering and Biotechnology Research B.P. 67 Dschang Institute, GEBRI, Université de Dschang Research Area, Rep. du CAMEROUN Borg El Arab, Post Code 21934, Alexandria Egypt Dr. Alfred Dixon Prof. Christine Rey International Institute of Tropical Agriculture (IITA) Dept. of Molecular and Cell Biology, PMB 5320, Ibadan University of the Witwatersand, Oyo State, Nigeria Private Bag 3, WITS 2050, Johannesburg, South Africa Dr. Sankale Shompole Dept. of Microbiology, Molecular Biology and Dr. Kamel Ahmed Abd-Elsalam Biochemisty, Molecular Markers Lab. (MML) University of Idaho, Moscow, Plant Pathology Research Institute (PPathRI) ID 83844, USA. Agricultural Research Center, 9-Gamma St., Orman, 12619, Dr. Mathew M. Abang Giza, Egypt Germplasm Program International Center for Agricultural Research in the Dr. Jones Lemchi Dry Areas International Institute of Tropical Agriculture (IITA) (ICARDA) Onne, Nigeria P.O. Box 5466, Aleppo, SYRIA. Prof. Greg Blatch Head of Biochemistry & Senior Wellcome Trust Dr. Solomon Olawale Odemuyiwa Fellow Pulmonary Research Group Department of Biochemistry, Microbiology & Department of Medicine 550 Heritage Medical Research Centre Biotechnology University of Alberta Rhodes University Edmonton Grahamstown 6140 Canada T6G 2S2 South Africa Dr. Beatrice Kilel Prof. Anna-Maria Botha-Oberholster P.O Box 1413 Plant Molecular Genetics Manassas, VA 20108 Department of Genetics USA Forestry and Agricultural Biotechnology Institute Faculty of Agricultural and Natural Sciences Dr. Jackie Hughes University of Pretoria Research-for-Development ZA-0002 Pretoria, South Africa International Institute of Tropical Agriculture (IITA) Ibadan, Nigeria Dr. O. U. Ezeronye Department of Biological Science Dr. Robert L. Brown Michael Okpara University of Agriculture Southern Regional Research Center, Umudike, Abia State, Nigeria. U.S. Department of Agriculture, Agricultural Research Service, Dr. Joseph Hounhouigan New Orleans, LA 70179. Maître de Conférence Sciences et technologies des aliments Dr. Deborah Rayfield Faculté des Sciences Agronomiques Physiology and Anatomy Université d'Abomey-Calavi Bowie State University 01 BP 526 Cotonou Department of Natural Sciences République du Bénin Crawford Building, Room 003C Bowie MD 20715,USA Dr. Marlene Shehata Dr. Yee-Joo TAN University of Ottawa Heart Institute Department of Microbiology Genetics of Cardiovascular Diseases Yong Loo Lin School of Medicine, 40 Ruskin Street National University Health System (NUHS), K1Y-4W7, Ottawa, ON, CANADA National University of Singapore MD4, 5 Science Drive 2, Dr. Hany Sayed Hafez Singapore 117597 The American University in Cairo, Singapore Egypt Prof. Hidetaka Hori Dr. Clement O. Adebooye Laboratories of Food and Life Science, Department of Plant Science Graduate School of Science and Technology, Obafemi Awolowo University, Ile-Ife Niigata University. Nigeria Niigata 950-2181, Dr. Ali Demir Sezer Japan Marmara Üniversitesi Eczacilik Fakültesi, Tibbiye cad. No: 49, 34668, Haydarpasa, Istanbul, Prof. Thomas R. DeGregori University of Houston, Turkey Texas 77204 5019, Dr. Ali Gazanchain USA P.O. Box: 91735-1148, Mashhad, Iran. Dr. Wolfgang Ernst Bernhard Jelkmann Medical Faculty, University of Lübeck, Dr. Anant B. Patel Germany Centre for Cellular and Molecular Biology Uppal Road, Hyderabad 500007 Dr. Moktar Hamdi India Department of Biochemical Engineering, Laboratory of Ecology and Microbial Technology Prof. Arne Elofsson National Institute of Applied Sciences and Department of Biophysics and Biochemistry Technology. Bioinformatics at Stockholm University, BP: 676. 1080, Sweden Tunisia Prof. Bahram Goliaei Dr. Salvador Ventura Departments of Biophysics and Bioinformatics Department de Bioquímica i Biologia Molecular Laboratory of Biophysics and Molecular Biology Institut de Biotecnologia i de Biomedicina University of Tehran, Institute of Biochemistry Universitat Autònoma de Barcelona and Biophysics Bellaterra-08193 Iran Spain Dr. Nora Babudri Dr. Claudio A. Hetz Dipartimento di Biologia cellulare e ambientale Faculty of Medicine, University of Chile Università di Perugia Independencia 1027 Via Pascoli Santiago, Chile Italy Prof. Felix Dapare Dakora Dr. S. Adesola Ajayi Research Development and Technology Promotion Seed Science Laboratory Cape Peninsula University of Technology, Department of Plant Science Room 2.8 Admin. Bldg. Keizersgracht, P.O. 652, Faculty of Agriculture Cape Town 8000, Obafemi Awolowo University South Africa Ile-Ife 220005, Nigeria Dr. Geremew Bultosa Dr. Luísa Maria de Sousa Mesquita Pereira Department of Food Science and Post harvest IPATIMUP R. Dr. Roberto Frias, s/n 4200-465 Porto Technology Portugal Haramaya University Personal Box 22, Haramaya University Campus Dr. Min Lin Dire Dawa, Animal Diseases Research Institute Ethiopia Canadian Food Inspection Agency Ottawa, Ontario, Dr. José Eduardo Garcia Canada K2H 8P9 Londrina State University Brazil Prof. Nobuyoshi Shimizu Department of Molecular Biology, Prof. Nirbhay Kumar Center