Abstract
The biological activities of syringomycins, syringopeptins, and syringotoxin, toxic iipodepsipeptides produced by Pseudomonas syringae pv. syringae, were investigated. Toxins were tested for lytic activity on sheep erythrocytes, for phytotoxic activity evaluated as electrolyte leakage from carrot tissues, and for antimicrobiai activity against fungi and bacteria. Both syringomycins and syringopeptins caused the haemolysis of red blood cells, however syringopeptins were more active than syringomycins. The results of a toxin assay on carrot tissues confirmed the higher phytotoxic activity of syringopeptins in comparison with syringomycins and the syringotoxin. The spectrum of antimicrobiai activity indicated that both toxin classes were ineffective on the growth of Gram-negative bacteria, whereas syringopeptins highly inhibited that of Gram-positive ones. All the toxins showed antifungal activities but the level of the effect depended on the toxin and the test organism.
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Lavermicocca, P., Iacobellis, N.S., Simmaco, M. (1997). Comparison of Biological Activities of Pseudomonas syringae pv. syringae Toxins. In: Rudolph, K., Burr, T.J., Mansfield, J.W., Stead, D., Vivian, A., von Kietzell, J. (eds) Pseudomonas Syringae Pathovars and Related Pathogens. Developments in Plant Pathology, vol 9. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5472-7_31
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DOI: https://doi.org/10.1007/978-94-011-5472-7_31
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