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Pakistan Journal of Biological Sciences
Year: 2004  |  Volume: 7  |  Issue: 3  |  Page No.: 431 - 435

Impact of Salicylic Acid on Symbiotic Relations Between Peas and Rhizobium leguminosarum bv. viceae

A.K. Glyanko, L.E. Makarova, G.B. Luzova, N.V. Mironova and G.G. Vasilieva    

Abstract: The study was targeted at the investigation of exogenous salicylic acid (SA) impact on bacteria proliferation in vitro, rhizobia penetration in the root tissues, the SA and hydrogen peroxide (H2O2) content in the root seedlings under inoculation of pea by compatible strain Rhizobium leguminosarum bv. viceae. Depending on the concentration SA either did not affect (0.0036-0.014 mM) rhizobia proliferation or suppressed their growth (0.07-0.2 mM) in vitro. Exogenous SA (0.2 mM) inhibited rhizobia penetration in the root tissues (by 2 and 5 times depending on pH medium) and contributed to the increase of endogenous SA and H2O2 content in the tissues. Various possible mechanisms of SA impact on rhizobial symbiosis are discussed.

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