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Bradyrhizobium japonicum mutants defective in cyclic ß-glucan synthesis show enhanced sensitivity to plant defense responses

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Mithöfer, A., Bhagwat, A., Keister, D., & Ebel, J. (2001). Bradyrhizobium japonicum mutants defective in cyclic ß-glucan synthesis show enhanced sensitivity to plant defense responses. Zeitschrift für Naturforschung, 56, 581-584.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-4CE5-6
Abstract
Susceptibility of the nitrogen-fixing soybean symbiont Bradyrhizobium japonicum to inducible plant defense metabolites such as phytoalexin and H2O2, was investigated. On the wild-type strain USDA 110 the soybean phytoalexin, glyceollin, showed bacteriostatic activity. Viable bacteria isolated from intact nodules were adapted to glyceollin. H2O2 in physiological concentrations did not affect wild-type bacteria. B. japonicum mutants defective in the biosynthesis of cyclic beta-(1-->3)-(1-->6)-glucans showed higher susceptibility to both phytoalexin and H2O2.