• Korean journal of applied entomology
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• v.16 no.4 s.33
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• pp.235-239
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• 1977

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.

• Korean Journal Plant Pathology
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• v.2 no.2
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• pp.102-106
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• 1986

The 719 isolates of Xanthomonas campestris pv. oryzae collected in Honam district during 1980-1984 were classified with new differential cultivars: 466($64-.8\%$) were pathotype K1, 116$(16.1\%)$ pathotype K2, 130$(18.1\%)$ pathotyps K3, and 7$(1.0\%)$ pathotype K4. No isolate for pathotype K5 was found. The isolates of pathotypes K1, K2 and K3 were distributed in the geographic regions, Haenam, Gwangyang, Gangjin, Wando, Igsan, and Buan. The isolates of all pathotypes were obtained from Milyang 23, Nagdong, and Dongjin which were susceptible to all the pathotypestested, while most of the isolates belonging to pathotype K3 and K4 were obtained from pungsan, Baegyang, Samgwang and Milyang 30.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.35 no.2
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• pp.132-136
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• 1990

This experiment was conducted to study the multiplication and spread of bacterial population in water exuded through the hydathode of infected leaf of Xanthomonas campestris pv. oryzae in resistant and susceptible rice cultivars to bacterial leaf blight. The results obtained are summarized as follows. The bacterial multiplication in resistant cultivars was almost constant from three days to twelve days after inoculation with population of 10$^3$-10$^4$cfu/$\textrm{cm}^2$, but the multiplication was increased as days after inoculation extended in susceptible cultivars. The speed of bacterial multiplication and the number of bacteria spread above and below the inoculated position were closely related with the resistance of rice cultivars to bacterial leaf blight. The bacterial multiplication and spread were observed throughout the all growing stages including seedling, maximum tillering and flag leaf stages. The bacterial populations in water exuded through the hydathode were dependent on the multiplication and spread, and the populations were also closely related with the resistance of rice cultivars.

• Proceedings of the Plant Resources Society of Korea Conference
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• v.18 no.1
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• pp.117-117
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• 2005

• The Plant Pathology Journal
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• v.17 no.6
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• pp.374.4-374
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• 2001

• The Plant Pathology Journal
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• v.17 no.6
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• pp.375.2-375
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• 2001

• The Plant Pathology Journal
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• v.17 no.6
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• pp.375.1-375
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• 2001

• Proceedings of the Korean Society of Plant Pathology Conference
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• 2002.11a
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• pp.42.2-43
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• 2002

• Proceedings of the Korean Society of Plant Pathology Conference
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• 2002.11a
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• pp.87.2-88
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• 2002

• Proceedings of the Korean Society of Crop Science Conference
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• 2006.04a
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• pp.146-147
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• 2006