Mixed cultures interactions

From all these results it can be concluded that the interaction of C. warmingii and the Desulforlstella sp. increased the growth yields over pure cultures in both membrane-separated and mixed cultures, and that this increase in yield can be explained by the cycling of the sulfur between the two organisms, in the manner designated by van Niel as a primitive cycle of matter. 

Antibacterial activity has also been observed in P. pentosaceus and in one strain of L. plantarum that strongly inhibits the growth of O. oeni, L. mesenteroides and L. hilgardii. The discovery of these molecules gives only an indication of the true situation in wine. These could be species or strain-specific, so further studies are required to understand these relationships better. Fernandez and Manca de Nadra (2006) recently studied the interaction between a proteolitic strain of O. oeni and a non-proteolitic strain of P. pentosaceus and found a mutualism in the mixed culture, providing new knowledge about the metabolic interaction between LAB. 

Bisson L. E, Kunkee, R. E. (1993) Microbial interactions during wine production. In J. G. Zeikus, E. A. Johnson (Eds.), Mixed Cultures in Biotechnology (pp. 37-68). New York McGraw-Hill. 

Cheraiti, N., Guezenec, S., Salmon, J. M. (2005) Redox interactions between Saccharomyces cerevisiae and Saccharomyces uvarum in mixed culture under enologjcal conditions. Applied... 

Favale, S., Pietromarchi, R, Ciolfi, G. (2007) MetaboUc activity and interactions between two strains, Saccharomyces cerevisiae r.f. bayanus (SBC2) and Saccharomyces cerevisiae T.f.uvarum (S6u), in pure and mixed culture fermentations. Vitis, 46, 39-43. 

Interactions of Microbial Populations in Mixed Culture Situations... 

When several populations of microorganisms inhabit a common abiotic environment they will almost invariably interact with one another. Attempts to construct theories of the dynamics of such systems—that is, to construct theories which will predict how the systems evolve in time—must be based therefore on knowledge of what interactions occur and on the kinetics of such interactions. Hence, the rest of what I have to say will focus on what is known about interactions in simple mixed culture systems. 

Dou, J. Liu, X. Hu, Z. (2008). Substrate interactions during anaerobic biodegradation of BTEX by the mixed cultures imder nitrate reducing conditions. Journal of Hazardous Materials, Vol. 15, No.2-3, pp. 262-272... 

Plant tissue culture technique provides completely controlled conditions to elucidate the growth and physiology of the cells and to study host-parasite interactions at the cellular level. There exists probably single paper on this interesting technique in ergot research on cultivation of C. fusiformis on a Pennisetum typhoides cell culture. The authors (Roy and Kumar, 1985) established the methodology and studied nutritional demands of the mixed culture with respect to the growth and alkaloid production. 

FIGURE 14.9 Suggested interaction mechanism in mixed cultures during the reductive dechlorination of oiganochloiines. 

The SCEM technique was proved applicable for investigating the interaction of different bacteria strains in mixed culture biofilms. In a recent study of Bard s group [146] the distribution of bacterial produced hydrogen peroxide concentration was determined using SECM line scans over specially grown biofilms. In these experiments gold disc electrode with 25 pm diameter was used as measuring tip. 

Alvarez, P.J. Vogel, T.M. 1991. Substrate interactions of benzene, toluene and para-xylene during microbial degradation by pure cultures and mixed culture aquifer slurries. Appl Environ Microbiol. 57(10) 2981-2985. 

---