Studies on the Chemical Resistance of Phytopathogenic Bacteria III. Some Variations on the Streptomycin Resistant Isolates of the Rice Bacterial Leaf Blight Pathogen, Xanthomonas oryzae(Uyeda et Ishiyama) Dowson

식물병원성세균의 약제저항성에 관한 연구 III. 벼 흰빛잎마름병균에 있어서 Streptomycin 내성균주의 몇 가지 변이

  • Published : 1977.12.01

Abstract

The experiments were contucted to investigate the variability of pathogenesity, growth amount and UV-sensitibity on the streptomycin resistant isolate of the rice bacterial leaf blight pathogen, Xanthomonas oryzae, which selected by the stepwise transfer in 100, 3,000 and 10,000 ug/ml Argepto contained media. And the results obtained were as follows. (1) The SM-resistant isolates were tested the pathogenesity on the differential variety of rice, wase-Aikoku-3, Rant Emas-2, Hwang ok, and Kimmase. And the SM resistant isolate, obtained from 75-6 isolate, showed the reaction of moderately resistant to the differential variety of Hwang ok instead of susceptible reaction with its parental isolate. (2) The growth amount of the SM-resistant isolate was slightly higher than that of parental isolate, on the normal media. And the growth was inhibited on the 100ug/ml Agrepto contained media until 60 hours after transfer, however, its growth exceeded than parental isolate in the normal media, after 70 hours of transfer. (3) It is considered that the resistance factor might be stable character, since the sensitivity to UV irradiation (with 254 mr wave length) of the resistant isolate was the same as that of its parental isolate.

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