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- W2078663705 abstract "SUMMARY The expression of R-gene resistance in tissue cultures of Solanum species was investigated. Tissue aggregates (4 mm. diam.) of Solanum tuberosum var. Majestic (rr) and Orion (R I) and other R-gene Solanum lines behaved in a similar way to the intact plants from which they were derived, in response to Phytophthora infestans race 4. Tissue aggregates of S. tuberosum var. Orion supported good growth of P. infestans race I, to which the intact Orion plant is susceptible, but did not support more than rudimentary growth of race 4, to which the intact Orion plant is resistant. Sectioning revealed that P. infestans race 4 made general growth in Majestic tissues, but was almost totally excluded from Orion tissues. A slide technique showed that Orion tissue suspensions, unlike those of Majestic, inhibited the growth of P. infestans race 4 germ tubes. This led to a demonstration that toxicity to P. infestans zoospores was developed in Orion but not in Majestic tissue cultures in response to infection with P. infestans race 4. It was concluded that R-genes may be expressed in tissue culture, that the failure of the Orion tissue to support growth of P. infestans may be due to expression of the R 1 gene, and that this may operate through the development of post infectional toxicity." @default.
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- W2078663705 date "1967-10-01" @default.
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- W2078663705 title "The Expression of R-gene Resistance to Phytophthora infestans in Tissue Cultures of Solanum tuberosum" @default.
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- W2078663705 doi "https://doi.org/10.1099/00221287-49-1-99" @default.
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