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Response of bean calli to filtrate from Pseudomonas syringae pv. phaseolicola and correlation with whole plant disease reaction

By: Contributor(s): Material type: ArticleArticleLanguage: English Description: 28:353-358Subject(s): LOC classification:
  • 28258
 In: Physiological and Molecular Plant PathologySummary: Se probaron cultivos de callos de cv. de frijol por su respuesta a filtrados toxicos de cultivos liquidos de Pseudomonas syringae pv. phaseolicola. La reaccion de los callos a los filtrados oscilo desde necrosis y menor crecimiento hasta no necrosis y crecimiento normal. Las plantas de cada cv. tambien se inocularon con suspensiones del patogeno en el invernadero. Charlevoix (rojo arrinonado) fue el mas susceptible en el invernadero y los callos de Charlevoix fueron los mas severamente afectados por el filtrado. Emerson (great northern) o Admiral (blanco) fueron los mas resistentes a la cepa en el invernadero y sus correspondientes callos no desarrollaron necrosis en medio que contenia filtrado. Las reacciones de la planta y los callos se correlacionaron utilizando el coeficiente de correlacion de clasificacion de Spearman y se obtuvo un valor de r (0.971) altamente significativo. Los resultados indican que un sistema de seleccion de callos puede identificar cv. de frijol resistentes al anublo de halo. (RA-CIAT)Summary: Callus cultures of bean cv. were tested for response to toxic filtrates from liquid cultures of Pseudomonas syringae pv. phaseolicola. Callus reaction to the filtrates ranged from necrosis and reduced growth to no necrosis and normal growth. Plants of each cv. were also inoculated in the greenhouse with suspensions of the pathogen. Charlevoix (red kidney) was the most susceptible in the greenhouse, and Charlevoix calli were most severely affected by the filtrate. Emerson (great northern) or Admiral (navy) were most resistant to the strain in the greenhouse, and the corresponding calli developed no necrosis on medium containing filtrate. Plant and calli reactions were correlated using Spearman's ranking correlation coefficient, and a highly significant r value (0.971) was obtained. Results suggest that acallus screening system can identify bean cv. resistant to halo blight. (AS)
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Se probaron cultivos de callos de cv. de frijol por su respuesta a filtrados toxicos de cultivos liquidos de Pseudomonas syringae pv. phaseolicola. La reaccion de los callos a los filtrados oscilo desde necrosis y menor crecimiento hasta no necrosis y crecimiento normal. Las plantas de cada cv. tambien se inocularon con suspensiones del patogeno en el invernadero. Charlevoix (rojo arrinonado) fue el mas susceptible en el invernadero y los callos de Charlevoix fueron los mas severamente afectados por el filtrado. Emerson (great northern) o Admiral (blanco) fueron los mas resistentes a la cepa en el invernadero y sus correspondientes callos no desarrollaron necrosis en medio que contenia filtrado. Las reacciones de la planta y los callos se correlacionaron utilizando el coeficiente de correlacion de clasificacion de Spearman y se obtuvo un valor de r (0.971) altamente significativo. Los resultados indican que un sistema de seleccion de callos puede identificar cv. de frijol resistentes al anublo de halo. (RA-CIAT) spa

Callus cultures of bean cv. were tested for response to toxic filtrates from liquid cultures of Pseudomonas syringae pv. phaseolicola. Callus reaction to the filtrates ranged from necrosis and reduced growth to no necrosis and normal growth. Plants of each cv. were also inoculated in the greenhouse with suspensions of the pathogen. Charlevoix (red kidney) was the most susceptible in the greenhouse, and Charlevoix calli were most severely affected by the filtrate. Emerson (great northern) or Admiral (navy) were most resistant to the strain in the greenhouse, and the corresponding calli developed no necrosis on medium containing filtrate. Plant and calli reactions were correlated using Spearman's ranking correlation coefficient, and a highly significant r value (0.971) was obtained. Results suggest that acallus screening system can identify bean cv. resistant to halo blight. (AS) eng

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