Quantitative relationship between maximum growth rates and the intracellular pattern of alpha-esterase and beta-esterase activity of leguminous infecting bacteria

Grassano, A.E.; Ronchi, A.L.; Garcia, P.G.; Mazzaferro, L.; Breccia, J.D.

New Biotechnology 26(5): 234-238


ISSN/ISBN: 1876-4347
PMID: 19833241
DOI: 10.1016/j.nbt.2009.10.001
Accession: 055324193

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Sixteen strains belonging to three families of the Rhizobiales order (Bradyrhizobiaceae, Phyllobacteriaceae and Rhizobiaceae) were evaluated according their specific growth rates (micro) and the activity of intracellular alpha-esterase and beta-esterase isoenzymes. The average esterase activity of 48 isoenzymes assayed belonging to five strains with low (micro(max) = 0.08-0.12 h(-1)), four medium (micro(max) = 0.13-0.22 h(-1)) and seven high (micro(max) = 0.24-0.28 h(-1)) growth rate values were 22.1 +/- 4.3; 8.7 +/- 2.2 and 3.9 +/-1.7 U g(-1) respectively. An inversely proportional relationship between the activity of the whole pattern of esterases and micro(max) was found. Our results illustrate a feature of intracellular esterases, ascribable in a variety of cellular functions, which might be related to characteristics micro(max) of legume infecting bacteria.