Summary
Phenolics, for example chlorogenic, caffeic and ferulic acid, and phytoalexins, such as rishitin and phytuberin, were identified in potato tubers cv. Kufri Chandramukhi. The tissue of healthy tubers contained no detectable phytoalexins but did contain phenolics. The levels of these compounds were correlated with soft rot development. The rotting tissue either was free of these groups of compounds or had low concentrations. The wound periderm formed as a result of recovery from injury and infection contained high levels of the compounds. Much higher concentrations were detected at lower storage temperatures when oxygen supply was adequate. Antibacterial properties of the phenolics identified were tested againstErwinia carotovora which was inhibited by chlorogenic, caffeic and ferulic acids. The three phenolics were more effective together, in proportions in which they occurred in wound periderm, than individually. It was observed that none of these phenolics could inhibit pectolytic enzymes ofE. carotovora.
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References
Booth, C., 1972. Preliminary screening of antibiotic activity. In: Methods in Microbiology, Vol. 4. Academic Press, London, New York, pp. 36–39.
Clifford, M. N. & J. Wight, 1976. The measurement of feruloylquinic acids and caffeoylquinic acids in coffee beans. Development of the technique and its preliminary application to green coffee beans. Journal of Science of Food and Agriculture 27: 73–84.
Hanson, K. R. & M. Zucker, 1963. The biosynthesis of chlorogenic acids and related conjugates of the hydroxycinnamic acids. Journal of Biological Chemistry 238: 1105–1115.
Henfling, J. W. D. M. & J. Kuć, 1979. A semi-micro method for the quantitation of sesquiterpenoid stress metabolites in potato tuber tissue. Phytopathology 69: 609–612.
Kolattukudy, P. E., 1978. Chemistry and biochemistry of the aliphatic compounds of suberin. In: Günter Kahl (Ed.), Biochemistry of Wounded Plant Tissues. Walter de Gruyter, Berlin, pp. 43–84.
Lyon, G. D., 1973. Occurrence of rishitin and phytuberin in potato tubers inoculated withErwinia carotovora var.atroseptica. Physiological Plant Pathology 2: 411–416.
Lyon, G. D., B. M. Lund, C. E. Bayliss & G. M. Wyat, 1975. Resistance of potato tubers toErwinia carotovora and formation of rishitin and phytuberin in infected tissue. Physiological Plant Pathology 6: 43–50.
Lyon, G. D. & C. E. Bayliss, 1975. The effect of rishitin onErwinia carotovora var.atroseptica and other bacteria. Physiological Plant Pathology 6: 177–186.
Rhodes, J. M. & L. S. C. Wooltorton, 1978. The biosynthesis of phenolic compounds in wounded plant storage tissues. In: Günter Kahl (Ed.), Biochemistry of Wounded Plant Tissues. Walter de Gruyter, Berlin, pp. 243–286.
Shirsat, S. G. & P. M. Nair, 1981. Biochemical mechanism for the inhibition of phenylalanine ammonia lyase in the absence of oxygen in potato tuber tissue. Phytochemistry 20: 2315–2318.
Vámos-Vigyázó, L., 1981. Polyphenol oxidase and peroxidase in fruits and vegetables. CRC Critical Review in Food Science and Nutrition, Sept. 49–127.
Walter, W. M., A. E. Purcell & G. K. McCollum, 1979. Use of High-Pressure Liquid Chromatography for analyses of sweet potato phenolics. Journal of Agricultural and Food Chemistry 27: 938–941.
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Ghanekar, A.S., Padwal-Desai, S.R. & Nadkarni, G.B. The involvement of phenolics and phytoalexins in resistance of potato to soft rot. Potato Res 27, 189–199 (1984). https://doi.org/10.1007/BF02357464
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DOI: https://doi.org/10.1007/BF02357464