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Lab-scale in vitro Mass Production of the Entomopathogenic Nematode Heterorhabditis bacteriophora Using Liquid Culture Fermentation Technology
American Journal of Bioscience and Bioengineering
Volume 3, Issue 6, December 2015, Pages: 203-207
Received: Dec. 8, 2015; Accepted: Dec. 17, 2015; Published: Dec. 30, 2015
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Authors
Devang Upadhyay, Sartorius Stedim Biotechnology Laboratory, Biotechnology Research and Training Center, the University of North Carolina at Pembroke, Pembroke, USA
Sivanadane Mandjiny, Department of Chemistry and Physics, the University of North Carolina at Pembroke, Pembroke, USA
Rebecca Bullard-Dillard, School of Graduate Studies and Research, the University of North Carolina at Pembroke, Pembroke, USA
Meredith Storms, College of Arts & Sciences, the University of North Carolina at Pembroke, Pembroke, USA
Michael Menefee, Thomas Family Center for Entrepreneurship, the University of North Carolina at Pembroke, Pembroke, USA
Leonard D. Holmes, Sartorius Stedim Biotechnology Laboratory, Biotechnology Research and Training Center, the University of North Carolina at Pembroke, Pembroke, USA
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Abstract
The objective of this research is to develop fermentation methodology for the production of the biocontrol agent Heterorhabditis bacteriophora. Deployment of this organism will reduce the use of chemical insecticides which threaten the environment. This study shows how to produce the entomopathogenic nematode (EPN) Heterorhabditis bacteriophora and its bacterial symbiont Photorhabdus luminescens utilizing an in vitro, monoxenic liquid culture. EPNs were cultured in three different bioreactor working volumes of 1.5, 4 and 7 liters with initial nematode inoculation concentrations of approximately 2x103/mL. Liquid nematode media was conditioned with the bacterial symbiont 24 hours prior to nematode inoculation. Within three days after inoculation, infective juveniles (IJs) developed into self-fertilizing hermaphrodites and eventually produced IJ offspring. Maximum nematode densities were obtained seven days post-nematode inoculation. All three working volumes (1.5, 4 and 7 liters) produced final yields of 4.6x104 ± 2000 IJs/mL, 4.2x104 ± 2200 IJs/mL and 3.9x104 ± 2000 IJs/mL, respectively. In vitro scale-up technology can be further optimized for production of this biocontrol agent by improving media formulation, process parameters, bioreactor design and inoculation times that will maximize nematode yield.
Keywords
Heterorhabditis bacteriophora, Photorhabdus luminescens, Entomopathogenic Nematode, Fermentation Technology, Biocontrol Agent
To cite this article
Devang Upadhyay, Sivanadane Mandjiny, Rebecca Bullard-Dillard, Meredith Storms, Michael Menefee, Leonard D. Holmes, Lab-scale in vitro Mass Production of the Entomopathogenic Nematode Heterorhabditis bacteriophora Using Liquid Culture Fermentation Technology, American Journal of Bioscience and Bioengineering. Vol. 3, No. 6, 2015, pp. 203-207. doi: 10.11648/j.bio.20150306.19
Copyright
Copyright © 2015 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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