青枯病抵抗性と感受性トマト品種による接木トマトにおける<i>lux</i>標識<i>Ralstonia solanacearum</i>の挙動

DOI Web Site 被引用文献20件 参考文献28件

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タイトル別名
  • The Behavior of Lux-marked Ralstonia solanacearum in Grafted Tomato Cultivars Resistant or Susceptible to Bacterial Wilt.
  • Behavior of Lux-marked Ralstonia solanacearum in Grafted Tomato Cultivars Resistant or Susceptible to Bacterial Wilt
  • The behavior ofgenetically lux-marked Ralstonia solanacearum in grafted tomato cultivars resistant orsusceptible to bacterial wilt.

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Ralstonia solanacearum OE1-1 was transformed with pNP126 carrying a luxCDABE operon of Vibrio fisheri and a promoter region derived from the genomic DNA of Burkholderia glumae. Intensity of bioluminescence from YN5 thus obtained positively correlated with growth of the bacteria from the lag phase to the stationary phase in vitro. In this study, we used the VIM camera equipped with the ARGUS 50 to successively observe bioluminescence and the development of bacterial wilt in singly and doubly grafted tomato plants in various combinations of the resistant LS-89 and the susceptible Oogata-Fukuju. The degree of bacterial growth in the roots and collars was one of the determinants for the induction of bacterial wilt in tomato plants. Resistance of LS-89 resulted from suppression of bacterial proliferation in the roots and stems below the first leaf. In grafted tomato plants using LS-89 as the rootstock, all rootstocks were latently infected with the bacteria. The bacteria were also recovered from susceptible scions even though the plants did not wilt. In some plants, the bacteria proliferated in the susceptible scions. These plants wilted heavily. Taken together, suppression of bacterial proliferation in the roots and the stems below the first leaf of resistant rootstocks affected the bacterial growth in the susceptible scions and quantative control of resistance against development of the disease.

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