| 한국에서 분리한 Ralstonia solanacearum에 대한 순계 토마토의 병 반응과 고온에서의 발병 |
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이형주, 조은정, 김남희, 채영, 이선우 |
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| Disease Responses of Tomato Pure Lines Against Ralstonia solanacearum Strains from Korea and Susceptibility at High Temperature |
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Hyoung Ju Lee, Eun Jeong Jo, Nam Hee Kim, Young Chae, Seon Woo Lee |
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| Abstract |
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This study evaluated disease resistance responses of pure lines of tomato plants at various temperature conditions against Ralstonia solanacearum strains isolated from Korea. Evaluation of six tomato lines with various strains of R. solanacearum showed that many strains can infect the resistant lines of tomato plants previously known as highly tolerant to bacterial wilt. One of the most virulent strains, SL341 (race 1 and biovar 4) caused severe infection on all six tomato lines, irrespective of temperature. In contrast, a moderately virulent strain SL1944 (race 1, biovar 4) showed the remarkable difference in disease progress on some resistant lines dependent on temperature. Moneymaker and Bonny Best were susceptible to SL1944 at all tested conditions with different temperature. However, tomato lines, such as Hawaii 7998, Hawaii 7996, Bblocking which were previously known as highly tolerant lines, were severely infected by SL1944 at relatively higher temperature (35oC for 14 hr light and 28oC for 10 hr dark cycle). The disease progress at high temperature was much faster than those at low temprature on the same tomato line and those on Moneymaker and Bonny Best at the same high temprature. This result suggested that R. solanacearum strains isolated in Korea were highly virulent to bacterial wilt resistant tomato lines and some strains may cause severe infection on those plants at higher temperature. |
| Key Words:
Bacterial wilt, Disease resistance, tomato plant |
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