Indole acetic acid production by Rhizobium: Effect of 2-ketoglutaric acid |
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| Authors: | T. Garcia-Rodriguez A.M. GuTierrez-Navarro R. Garcia J.Perez Silva |
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| Affiliation: | Departamento de Microbiologia, Facultad de Biologia. Universidad de Sevilla, Sevilla, Spain |
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| Abstract: | I ndole acetic acid (IAA) production from tryptophan by cell suspensions of Rhizobium trifolii, R. leguminosarum, R. phaseoli and R. lupini was studied in the presence or in the absence of 2-ketoglutaric acid. In R. lupini, production of IAA was strongly enhanced by the ketoacid, but in fast growing rhizobia it was less enhanced or unaffected. On the other hand, glutamic acid inhibits IAA production by R. meliloti, but stimulates IAA production in both R. leguminosarum and R. phaseoli. A hypothesis is proposed to explain these results. |
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