뿌리혹병에 대한 저항성 및 감수성 품종간의 glucosinolate 함량 변이

다국어 초록 (Multilingual Abstract)

Variations of major glucosinolate (GS) contents in root among 35 clubroot-resistant and -susceptible Chinese cabbage (Brassica campestris ssp. pekinensis) cultivars cultivated on infected soil were evaluated. Two indolic (glucobrassicin and 4-methoxy-glucobrassicin) and one phenyl GS (gluconasturtiin) were identified as major GSs in Chinese cabbage root. Among the three identified GSs, the contents of glucobrassicin and gluconasturtiin were found to be positively correlated with the clubroot disease severity (r²=0.519), while the 4-methoxy-glucobrassicin content was negatively correlated (r²=0.684). After artificial infection with P. brassicae, the glucobrassicin and gluconasturtiin contents in root increased after 20 days in only the two susceptible cultivars ‘Chilsung’ and ‘Kangryeok-Yeorum’, while the content changes in the two resistant cultivars ‘CR-kangta’ and ‘CR-saerona’ were not significant. The 4-methoxy-glucobrassicin content significantly decreased in the two susceptible cultivars from 20 days after infection, showing the inverse fluctuation compared to the other GSs. Consequently, we could detect the characteristic positive or negative correlation of individual GS with clubroot disease severity and rapid fluctuation of GS contents after infection in Chinese cabbage root.

참고문헌 (Reference)

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