Bacteria interactions

J. M. Barea, Mycorrhiza-bacteria interactions on plant growth promotion. Plant Growth Promoting Rhizohacteria (A. Ogoshi, K. Kobayashi, Y. Homma, F. Ko-dama, N. Kondo, and S. Akino, eds.), OECD Press, Paris, 1997, pp. 150-158. 

In order to test the reversibility of metal-bacteria interactions, Fowle and Fein (2000) compared the extent of desorption estimated from surface complexation modeling with that obtained from sorption-desorption experiments. Using B. subtilis these workers found that both sorption and desorption of Cd occurred rapidly, and the desorption kinetics were independent of sorption contact time. Steady-state conditions were attained within 2 h for all sorption reactions, and within 1 h for all desorption reactions. The extent of sorption or desorption remained constant for at least 24 h and up to 80 h for Cd. The observed extent of desorption in the experimental systems was in accordance with the amount estimated from a surface complexation model based on independently conducted adsorption experiments. 

Bratbak, G., and T. F. Thingstad. 1985. Phytoplankton-bacteria interactions An apparent paradox Analysis of a model system with both competition and commensalism. Marine Ecology Progress Series 25 23-30. 

Soto, M.J., Domfnguez-Ferreras, A., Perez-Mendoza, D., Sanjuin, J., Olivares, J. Mutualism versus pathogenesis The give-and-take in plant-bacteria interactions. Cell Microbiol 11 (2009) 381-388. 

The phytoremediation process may be viewed as a symbiotic process between plants and soil microbes that involved in phytoremediation (Lasat, 2002). Plant and bacterial interaction can enhance the effectiveness of phytoremediation technology because plants provide carbon and energy sources or root exudates in the rhizosphere that will support microbial community in the degradation and transformation of soil pollutants (Siciliano and Germida, 1998). In addition, the presence of soil microbes can increase the water solubility or bioavailability of pollutants in soils, which facilitates the uptake of pollutants by plants (Lasat, 2002 Siciliano and Germida, 1998). However, the specificity of the plant-bacteria interactions besides being much intricate is dependent upon soil and the aqueous conditions, which can alter contaminant... 

An SCM approach has been used in numerous studies examining metal-bacteria interactions, and these studies should guide future investigations of lichens and fungi. For example, Fein et al. (1997) modelled acid-base titration and metal adsorption data for the Gram-positive bacterium Bacillus subtilis using a CCM depiction. The authors... 

Shashar, N., Cohen, Y., Loya, Y., and Sar, N. (1994a). Nitrogen-Fixation (Acetylene-Reduction) in Stony Corals - Evidence for Coral-Bacteria Interactions. Mar. Ecol. Prog. Ser. 111(3), 259—264. 

Welsh, D. T. (2000). Nitrogen fixation in seagrass meadows Regulation, plant-bacteria interactions and significance to primary productivity. Ecol. Lett. 3(1), 58—71. 

There are basically two types of deodorants simple deodorants and antiperspirants. Deodorants help control odor primarily by masking the odor caused by the bacteria interacting with perspiration and by reducing odor-causing bacteria. Deodorants have no effect on decreasing sweat. Antiperspirants help control wetness, and thereby odor, by slowing the flow of perspiration to the surface of the skin. 

Modulation of epithelial cell-bacteria interaction through EPs 7630 may protect mucous membranes from microorganisms evading host defence mechanisms. This provides a rationale for the treatment of upper respiratory tract infections with EPs 7630 (727). 

Assessment of Toxicity. Dilution tests were performed to examine a possible toxicity phenomenon. In these tests surfactant solutions were diluted to concentrations below those resulting in micelle formation by addition of water or soil and water. Such dilution was observed to result in the recovery of the phenanthrene-degrading ability in the soil-water systems. This recovery suggested that the presence of surfactant micelles did not result in cell lysis or destruction, and that the inhibition may be attributable to some reversible surfactant-bacteria interaction. 

Bacteria interact with environmental chemicals in a number of ways. Many organic compounds are partially or completely degraded by bacteria. In some cases the organic products are even more toxic than the original pollutants. 

P. savastanoi strain isolated from infected oleander plants (see above), proved to be virulent on both oleander and olive plants, while olive strain was shown to be virulent only on the host plant. The molecular basis of this host-pathogen specificity is poorly understood. Exopolysaccharides (EPS) and cell-wall LPS of phytopathogenic bacteria have been correlated with pathogenesis its chemical structure and tridimensional conformation may play a role in the early infection process and in the determination of plant-bacteria interaction specificity [92]. The LPS of three strains of P. savastanoi were isolated and the structure of their O-chain portion were determined by chemical and NMR spectral analysis. For all the strains the O-chain consists of a tetrasaccharide repeating unit of three a-L-Rhap and one terminal non-reducing a-D-Fuc-p3NAc. Two rhamnosyl residues are 3-linked and the third one 2,3-linked as reported [93]. 

AC is included in the recommended treatment of ricin, saxitoxin, T2 mycotoxins and botulinum toxin poisoning although its efficacy remains to be proven [65,71]. It is interesting that rather large objects such as bacteria (0.1-10 pm) can be retained by AC at all these results suggest that the nature of AC surface - bacteria interaction cannot be attributed to physical adsorption only for smaller objects such as vimses (10-100 ran) and molecules of biotoxins which have molecular weight up to 1000 kDa contribution of adsorption in mesopores may be important. 

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