Serological properties were compared among four biovars of Erwinia amylovora. Two biovars (bvs. 1 and 2) from Maloideae sources outside of Japan, one (bv. 3) from Rubus idaeus and one causing bacterial shoot blight of pear (bv. 4) had different reactions in Ouchterlony double diffusion tests using living cells and lipopolysaccharides (LPS) as antigens. These findings indicate that E. amylovora can be classified into three serotypes; i.e., bvs. 1 and 2, bv. 3 and bv. 4. From results of Ouchterlony double diffusion tests and immunoblots, the specific antigen of the three serotypes may each exist in the LPS of E. amylovora strains.
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Received 27 March 2002/ Accepted in revised form 2 July 2002
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MIZUNO, A., SATO, S. & KAWAI, A. Serological Differences among Erwinia amylovora Biovars. J Gen Plant Pathol 68, 350–355 (2002). https://doi.org/10.1007/PL00013102
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DOI: https://doi.org/10.1007/PL00013102