KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Multiplication and Movement of Xanthomonas oryzae pv. oryzae in Rice Leaves with Resistance Genes Derived from Different Origins

기원이 다른 저항성 유전자를 갖는 근동질 계통에서 Xanthomonas oryzae pv. oryzae의 증식과 이동

  • Kang, Sun-Joo (College of Agric. & Life Science, Chungnam National University) ;
  • Lee, Sung-Eun (College of Agric. & Life Science, Chungnam National University) ;
  • Kim, Min-Jeong (College of Agric. & Life Science, Chungnam National University) ;
  • Han, Jin-Soo (College of Agric. & Life Science, Chungnam National University) ;
  • Choi, Jae-Eul (College of Agric. & Life Science, Chungnam National University)
  • 강선주 (충남대학교 농업생명과학대학 응용식물학과) ;
  • 이성은 (충남대학교 농업생명과학대학 응용식물학과) ;
  • 김민정 (충남대학교 농업생명과학대학 응용식물학과) ;
  • 한진수 (충남대학교 농업생명과학대학 응용식물학과) ;
  • 최재을 (충남대학교 농업생명과학대학 응용식물학과)
  • Received : 2010.08.23
  • Published : 2010.12.31
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Abstract

The multiplication and movement of Xanthomonas oryzae pv. oryzae in rice leaves of seven near-isogenic lines(NILs) derived from different genetic sources and from the susceptible cultivar Toyonishiki were examined. The bacterium populations increased rapidly in susceptible cultivar leaves of the inoculation sites but increased gradually in NIL leaves. X oryzae pv. oryzae were detected at 20cm above the leaves of the inoculated sites in IRBB 103 and Toyonishiki but were not detected in the other NILs at 25 days after inoculation. These results support that resistant genes restrict bacterial movement not multiplication.

저항성원이 다른 7개이 근동질 저항성 계통과 감수성 품종인 Toyonishiki에서 X. oryzae pv. oryzae의 증식과 이동에 관한 시험을 실시하였다. 접종 10일 후, NIL의 접종부위 잎의 세균밀도는 약 $10^5{\sim}10^6\;cfu/cm^2$이었으나 감수성 품종인 Toyonishiki에서는 약 $10^7\;cfu/cm^2$로 높게 나타났다. 이와 같이 감수성 품종에서의 세균 수는 급속히 증가하였으나 NIL에서는 점차적으로 증식하였다. IRBB 103과 Toyonishiki는 접종 25일 후에 접종부위로부터 20cm 위쪽에서 세균이 검출되었으나 다른 NIL에서는 검출되지 않았다. 이와같이 Xa1, Xa4, xa5, Xa7 저항성 유전자는 세균의 이동을 크게 억제하였다.

Keywords

References

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