Bioremediation through Rhizosphere Technology by Todd A. Anderson, Joel R. Coats

By Todd A. Anderson, Joel R. Coats

The 1st compilation of study on microbial degradation of contaminants within the rhizosphere. Discusses the interactions among microorganisms, crops, and chemical substances within the rhizosphere. Examines the degradation of commercial chemical substances, together with polycyclic fragrant hydrocarbons, pentachlorophenol, and trichloroethylene, in addition to the degradation of insecticides within the rhizosphere. evaluate chapters supply overviews of bioremediation and rhizosphere microbiology.

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This hypothesis about the capacity of polyphenolics to be used as an electron acceptor by a non-motile Azospirillum lipoferum strain is coincidental with the discovery that such strains also have the capacity to achieve the oxidative transformation of phenolic compounds (34). This suggests that the adaptation of Azospirillum to thericerhizosphere, could involve the use of phenolic redox couples to refine the tuning of the bacterial environment to a redox value optimal for the functioning of its nitrogenase.

Influence of phenolics on Azospirillum lipoferum 4 T strain growth under 5 kPa O2. All standard errors of means were < 5%. growth was stimulated by three of the six tested compounds: 3,4-DHBA > CAF > 2HPAA and not inhibited by CAT (Figure 2). V A N and 4-HBA either slightly stimulated, or did not influence 4 T strain growth (data not shown). The growth of 4 B strain was not influenced by the presence of the tested phenolics under both 20 and 5 kPa partial pressure 0 conditions (data not shown).

49. 50. 51. 52. WALTON ET AL. ; Plant Microbiology, Edward Arnold: Baltimore, MD, 1985. ; Interrelationships Between Microorganisms and Plants in Soil; Elsevier: Amsterdam, 1989. ; Biotechnology of Plant-Microbe Interactions; McGrawHill Publishing Company: New York, NY, 1990. ; Greaves, P. ; John Wiley and Sons: New York, NY. 1990, pp 11-34. E. Mycorrhizal Symbiosis; Academic Press: New York, NY, 1983. Radford, A. ; Ahles, H. R. : Chapel Hill, NC, 1981. R. The Fundamentals of Nitrogen Fixation; Cambridge University Press: New York, NY, 1982.

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