Effect of the Essential Oils from Parsley and Fennel Seeds on the Growth of Lactobacillus Casei Subsp RhamnosusOuis Nawel1*, Hariri Ahmed2 and El abed Donia zed1
- Corresponding Author:
- Ouis Nawel
Laboratory of Chemistry, Department of Chemistry
Faculty of Sciences, University of Oran Es- Sénia
BP 1524 El M’naouer
31.100, Oran, Algeria
Tel: + 213 45 82 09 27
Fax: + 213 45 82 09 27
Received date: January 03, 2012; Accepted date: March 20, 2012; Published date: March 22, 2012
Citation: Nawel O, Ahmed H, abed Donia zed El (2012) Effect of the Essential Oils from Parsley and Fennel Seeds on the Growth of Lactobacillus casei subsp rhamnosus. J Biotechnol Biomaterial 2:130. doi:10.4172/2155-952X.1000130
Copyright: © 2012 Nawel O, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
In this paper the key odorants effects of parsley ( Petroselinum crispum Hoffm) and fennel ( Foeniculum vulgare ) in the growth of Lactobacillus casei subsp rhamnosus , were studied. Parsley and fennel essential oils were obtained by hydrodistillation with 0.14% yield from parsley and 1% from fennel. All experiments were carried out in a 2L jar fermenter with an initial volume of 1.5L at 42°C, and the constant, adjusted to 200 rpm. Lactobacilli suspensions were incubated at 42°C for 12hr at 200 rpm and then a 10% (v/v) of the bacterial suspension was added to the cultures. The culture pH was maintained at 6.25 by automatic addition of 25% (w/w) NH 4 OH. For that purpose, batch cultures on MRS medium containing 15 g.L -1 of glucose were realized: the first fermentation is considered as a control, the second is characterized by the addition of 20 μL of the parsley essential oil in the growth exponential phase and the third contains additionally 20 μL of the fennel essential oil. The results show that Lactobacillus casei subsp rhamnosus can produce up to 10.96 g.L -1 and 13.78 gL -1 of lactic acid on the control fermentation and on the second fermentation, respectively. The addition of the fennel essential oil provokes an inhibition of the Lactobacillus casei subsp rhamnosus growth which is translated by the obtained weak lactic acid concentration of 5.14 g.L -1 .