Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Simple Mass-screening Methods for Resistance of Tomato to Fusarium oxysporum f. sp. lycopersici

토마토 시들음병에 대한 간편 대량 저항성 검정법

  • Park, Myung Soo (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology) ;
  • Jang, Kyoung Soo (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology) ;
  • Choi, Yong Ho (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology) ;
  • Kim, Jin-Cheol (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology) ;
  • Choi, Gyung Ja (Research Center for Biobased Chemistry, Korea Research Institute of Chemical Technology)
  • 박명수 (한국화학연구원 바이오화학연구센터) ;
  • 장경수 (한국화학연구원 바이오화학연구센터) ;
  • 최용호 (한국화학연구원 바이오화학연구센터) ;
  • 김진철 (한국화학연구원 바이오화학연구센터) ;
  • 최경자 (한국화학연구원 바이오화학연구센터)
  • Received : 2012.07.11
  • Accepted : 2012.10.05
  • Published : 2013.02.28
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Abstract

This study was carried out to establish the simple mass-screening methods for resistant tomato to Fusarium wilt caused by Fusarium oxysporum f. sp. lycopersici (FOL). Root dip inoculation method has been used in many studies on the resistance of tomato to disease. On the other hand, in mass-screening for resistant tomato to Fusarium wilt, the inoculation method is time-consuming and laborious procedure. Disease development of two FOL isolates on two cultivars of tomato according to inoculation method including root dip, tip and scalpel methods were investigated. In compatible interaction, tomato seedlings of each cultivar inoculated by tip method showed the lower and more variable disease severities than by root dip method. Whereas the seedlings by scalpel method represented clear resistant and susceptible responses to Fusarium wilt as root dip method. The resistance degree of each cultivar inoculated with FOL isolates by scalpel method was hardly affected by the tested incubation temperature and inoculum concentration. On the basis of the results, we suggest scalpel inoculation method as an efficient mass-screening method for resistant of tomato cultivars to Fusarium wilt. Roots of tomato seedlings at two-leaf stage grown in plastic cell tray were injured with scalpel and then spore suspension (more than $1{\times}10^7\;conidia{\cdot}mL^{-1}$) of FOL was poured directly on the roots. The infected plants were cultivated in a growth room at $25-30^{\circ}C$ for 4 weeks with 12-hours light a day.

본 연구는 Fusarium oxysporum f. sp. lycopersici(FOL)에 의해 발생하는 토마토 시들음병의 간편 대량 유묘 검정 방법을 확립하고자 수행하였다. 토마토 시들음병 연구에는 root dip 접종 방법을 많이 사용하고 있으나, 대량의 시료에 대한 병 저항성 검정에서 이 방법은 시간이 많이 소요되고 힘이 많이 드는 어려움이 있다. 대량 검정을 위한 간편한 접종 방법을 선발하고자 FOL race 2와 3 균주를 root dip, tip 및 scalpel 등의 방법으로 접종하고 두 토마토 품종에서 시들음병 발생을 조사하였다. Tip 방법에 의해 접종한 토마토는 root dip 방법으로 접종한 토마토보다 더 낮은 발병도를 보였으며 개체 간 발병도 차이가 더 컸다. 반면에 scalpel방법은 root dip 방법에서처럼 토마토 시들음병에 대하여 분명한 감수성과 저항성 반응을 나타내었다. 이들 결과로부터 대량 시료를 위한 토마토 시들음병 저항성 검정에서 root dip 접종 방법보다 더 간단하고 효율적인 scalpel 이용 접종 방법을 선발하였다. Scalpel 접종 방법은 실험한 접종원 농도 및 재배 온도 등의 발병 조건에 의해 토마토 품종들의 저항성 및 감수성 반응은 영향을 받지 않았다. 따라서 토마토 시들음병에 대한 대량 유묘 검정 방법으로 연결 포트에서 재배한 2엽기 토마토 유묘의 뿌리를 scalpel을 이용하여 상처를 준 후에 FOL 포자 현탁액을 관주하여 $25-30^{\circ}C$ 생육상에서 하루에 12시간씩 광을 조사하면서 4주 동안 재배하는 것을 제안한다.

Keywords

References

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