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本试验用50个稻褐鞘病菌株与5个Xanthomonas campestris致病变种(pv.campestris,pv.translucens.pv.oryzae,pv.oryzicola和pv.citri)的对照菌株,测定其生理生化性状所得的结果基本上是相同的.4个稻褐鞘病菌菌株和5个对照菌株的DNA G+C含量测定栩近。4个稻褐鞘病菌菌株与5个对照菌株以及对照菌株之间DNA—DNA杂交率低,而稻褐鞘病菌菌株之间杂交率却很高。因而认为稻褐鞘病菌为Xanthomonas cempest-ris的一个新致病变种,命名为X.campestris.pv.brunneiveginae nov.pv.Luo,Liao et Chen.
In this experiment, 50 strains of Oryza sclerotiorum and 5 strains of Xanthomonas campestris pathogenic strains (pv.campestris, pv.translucens.pv.oryzae, pv.oryzicola and pv.citri) were used to determine their physiological and biochemical characters The results were essentially the same, and the determination of DNA G + C content in four M. colesionum strains and five control strains was nearly complete. The rate of DNA-DNA hybridization between the four M. colespropioni strains and the five control and control strains was low, whereas the rate of cross-breeding between M. difficile strains was high. Therefore, the brown coleoporosis is considered as a new virulent mutant of Xanthomonas cempest-ris and is named as X. campestris.pv.brneneiveginae nov.pv.Luo, Liao et Chen.