Journal of Biotechnology & Biomaterials
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common scab is one of the most bacterial diseases that costs economic loses.
Lambert and Loria (syn.
) is the main causal agent of common scab in potato in the field. Eight
potato cultivars namely, Diamont, Lady Rossete, Burna, Lady Bellford, Skenta, Flora, Brofent and Everest were tested for
theirresistance (susceptibility) to common scab disease under greenhouse conditions. They varied to some extent in the degree
of their susceptibility. Lady Rosette appeared to be the highest susceptible one followed by Burna, Everest, and Skenta. Lady
Bellford, Diamont and Brofent showed intermediate disease severity. Flora cultivar exhibited the least degree of scab symptoms.
The role of certain potato tubers constituents in the physiology of disease resistance was investigated (sugar contents, Pectin
substances and calcium contents), Lady Bellford cultivar contained the highest concentration of total sugar followed by Flora,
Burna, and Everest but Skenta, Lady Rosette and Diamont were approximately had equal in total sugar contents, while, Brofent
cultivar contained the lowest content of total sugar. Skenta cultivar contained the highest concentration of pectin substances
and calcium contents followed by Flora and Lady Bellford finally Burna cultivars.
Mahmoud R Asran is the Professor of Plant Pathology, Faculty of Agriculture, Sohag University, Egypt. He completed his PhD in Plant Pathology, Assiut University,
Assiut, Egypt (1992-1998) and Post-doctoral studies in Hohenheim Uni. Institute for Phytomedicine, Stuttgart, Germany (1998-2002). He has more than 15
research publication in various journals.
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