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Distribution and multiplication of <Emphasis Type="Italic">Ralstonia solanacearum</Emphasis> in tomato plants with resistance derived from different origins |
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| Authors: | |
| Institution: | (1) National Agricultural Research Center, Kannondai, Tsukuba, 305-8666, Japan;(2) National Agricultural Research Center for Western Region, Fukuyama, Japan |
| Abstract: | The distribution and multiplication of Ralstonia solanacearum in tomato plants of 11 resistant cultivars derived from different genetic sources and susceptible cultivar Ponderosa were examined. Bacterial multiplication in stems of resistant tomato plants was suppressed owing to the limitation of pathogen movement from the protoxylem or the primary xylem to other xylem tissues. The limitation was most conspicuous in Hawaii 7996. Grafting experiments indicated that the percentage of wilting of Ponderosa scions was less on Hawaii 7996 rootstocks than that on the most resistant rootstock (LS-89) used in Japan. Hawaii 7996 could be an alternative genetic source for breeding for resistance to bacterial wilt. |
| Keywords: | Tomato Ralstonia solanacearum Resistance Rootstock Histopathology |
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