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对近200株3—6叶期的大白菜分别进行注射接种和破伤接种,结果从植株未接种的其它部位均回收到病原细菌,含菌量为10~3——10~7CFU/克鲜组织,且以接种叶叶柄的含菌量为最高,均在10~6CFU/克以上。当4株幼苗同时生长在一个盆钵中,对其中一株的叶片进行接种,从其余3株各部位也分离到病原细菌,第3天组织含菌量为10~2—10~4CFU/克,并以根部为最高,在10~5CFU/克以上。病原细菌从叶片侵入后,可在整个生育期的大白菜组织内回收到。幼苗期伤口接种通常并不引起显著病变。
Nearly 200 3-6 leaf stage Chinese cabbage were inoculated with vaccination and tetanus, the results of the uninoculated plants were recovered from other parts of the pathogenic bacteria were recovered, with a bacteria content of 10 ~ 3 - 10 ~ 7CFU / g fresh Tissue, and inoculation leaf petiole containing the highest amount of bacteria, are in 10 ~ 6CFU / g or more. When 4 seedlings were grown in a pot at the same time, the leaves of one of them were inoculated, and the pathogenic bacteria were also isolated from the other 3 strains. The amount of bacteria in the tissue on the 3rd day was 10 ~ 2-10 ~ 4CFU / g , And the highest root, at 10 ~ 5CFU / g or more. Pathogenic bacteria invade the leaves, can be recycled throughout the growing period of cabbage tissue. Seedling wound inoculation usually does not cause significant lesions.