Investigations into the mode of resistance of potato tubers toFusarium roseum ‘Sambucinum’ |
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| Authors: | Valerie J. O’Brien Simeon S. Leach |
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| Affiliation: | 1. Research Assistant Botany and Plant Pathology Department, University of Maine and USDA, ARS, University of Maine, 04469, Orono, Maine
2. R.F.D. #1, Box 223, 04401, Bangor, Maine
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| Abstract: | In a histological study comparing tuber resistance of potato clone B7200-33 and susceptible variety “Russet Burbank” toFusarium roseum ‘Sambucinum’, the formation of suberin and wound periderm was found to be an important resistance mechanism. In B7200-33 tubers a continuous suberin layer was formed whereas in ‘Russet Burbank’ tubers the suberin was formed in clumps so that the pathogen easily could invade the tissue between the clumps but not through a continuous layer. Wound periderm also was formed at a more rapid rate in B7200-33 than in ‘Russet Burbank’ tubers thereby “walling off” the pathogen and reducing decay. |
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