Abdel-Sattar,, M., El-Sherif, E., El-Marzouky, H., Mahmoud, M. (2009). BIOCHEMICAL RESPONSE IN POTATO CULTIVARS TO INFECT WITH Rhizoctonia solani THE CAUSAL OF STEM CANKER AND BLACK SCURF DISEASE IN EGYPT.. test, 34(6), 6941-6951. doi: 10.21608/jppp.2009.217177
M. A. Abdel-Sattar,; Ebtisam M. El-Sherif; Hanan El-Marzouky; M. A. E. Mahmoud. "BIOCHEMICAL RESPONSE IN POTATO CULTIVARS TO INFECT WITH Rhizoctonia solani THE CAUSAL OF STEM CANKER AND BLACK SCURF DISEASE IN EGYPT.". test, 34, 6, 2009, 6941-6951. doi: 10.21608/jppp.2009.217177
Abdel-Sattar,, M., El-Sherif, E., El-Marzouky, H., Mahmoud, M. (2009). 'BIOCHEMICAL RESPONSE IN POTATO CULTIVARS TO INFECT WITH Rhizoctonia solani THE CAUSAL OF STEM CANKER AND BLACK SCURF DISEASE IN EGYPT.', test, 34(6), pp. 6941-6951. doi: 10.21608/jppp.2009.217177
Abdel-Sattar,, M., El-Sherif, E., El-Marzouky, H., Mahmoud, M. BIOCHEMICAL RESPONSE IN POTATO CULTIVARS TO INFECT WITH Rhizoctonia solani THE CAUSAL OF STEM CANKER AND BLACK SCURF DISEASE IN EGYPT.. test, 2009; 34(6): 6941-6951. doi: 10.21608/jppp.2009.217177

BIOCHEMICAL RESPONSE IN POTATO CULTIVARS TO INFECT WITH Rhizoctonia solani THE CAUSAL OF STEM CANKER AND BLACK SCURF DISEASE IN EGYPT.

Journal of Plant Protection and Pathology
Article 15, Volume 34, Issue 6, June 2009, Pages 6941-6951    PDF (619.93 K)
Document Type: Original Article
DOI: 10.21608/jppp.2009.217177
Authors
M. A. Abdel-Sattar,1; Ebtisam M. El-Sherif2; Hanan El-Marzouky1; M. A. E. Mahmoud2
1Dept. Agric. Botany, Faculty of Agriculture, Suez Canal University
2Plant Pathol. Res. Institute, Agric. Res. Center, Giza Egypt
Abstract
Potato cultivars differ in their susceptibility to stem canker and black scurf disease caused by Rhizoctonia solani. Cultivar reactions of the most nine common commercial cultivars of potato were tested under greenhouse conditions of plant pathology research Institute, ARC-Giza. The nine tested cultivars were divided to three groups . Lady Rosetta was the most susceptible cultivar followed by Monalisa and Mondial cvs. Spounta , Nicola and Hernez cultivars showed moderate susceptibility , While Draga followed by Kara and Diamond were the most resistant . The two potato cultivars Draga the resistant cv.and lady Rosetta , the highly susceptible one were selected to study the nature of disease resistance among potato cultivars . Fraction of phenolic compounds by HPLC, oxidative enzymes and thio amino acid contents were determined in leaves and root of these potato cultivars. The resistance cultivar Draga showed higher amounts of free , conjugated and total phenols , fraction of phenolic compounds ( Coumarin ,Caffeic acid,p-Coumaric acid ,Benzoic acid ,Resorcinol and Apigenin ), oxidative enzymes ( peroxidase and polyphenoloxidase ) and thio amino acids ( Cysteine , Cystine and Methionine ) compared with lady Rosetta , the highly susceptible cultivar.
Keywords
Potato; Rhizoctonia solani; Stem canker; Black scurf; Oxidative enzymes; Phenolic compounds; Fraction of phenolic compound; HPLC
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