The relationship between common scab severity and reducing sugar contents in the peel of potato tubers

Variability and genetic diversity among Streptomyces scabiei infected potato cultivars with common scab from Egypt

“…Data indicated that there is correlation between tuber contents of total sugars and common scab severity. That match with Goto (1981) who reported that tubers of scab-susceptible cultivars had more scab and a higher reducing sugar content than those of resistant cultivars. Calcium contents in potato cultivars affected the incidence of common scab disease (Conn et al, 1998;Funa et al, 2005;Gottlieb, 1961;Lindholm et al, 1997;Wanner, 2004).…”

“…It has been showed that there is a relationship between levels of some tuber's constituents and their susceptibility to common scab disease. Many researchers suggested that these constituents such as: calcium, potassium, manganese (Davis et al, 1976) or reducing sugars (Goto, 1981) may play an important role in disease resistance. This study was designed to study the variation between the isolates of the pathogen, molecular comparison between Isolates of common scab, molecular confirmation of causal pathogens of common scab diseases.…”

Factors Affecting Thaxtomin A Production by Streptomyces scabies in Egypt

“…Potatoes are particularly high in starch, but starch does not support Thaxtomin A production. The sugar content of potato tubers can be as high as 10% of the dry weight (Kadam et al, 1991) and it has been reported that the incidence of potato scab is correlated with the level of reducing sugars, specifically glucose, in the tuber (Goto, 1985). However, appreciable Thaxtomin A production did not found on glucose, and when oatmeal broth is supplemented with glucose, Thaxtomin production is inhibited.…”

The Relative Importance of Precipitation and Sugar Content in Potato Peel for the Detection of the Incidence of Common Scab (Streptomyces scabies)

“…Cultivars Shimabara and Jubel are comparatively resistant to scab. Whereas Tachibana and Nishiyutaka are more susceptible (16). This graph shows that the susceptible cultivars (Tachibana and Nishiyutaka) exhibited a higher sugar content in the peels than the resistant cultivars (Shimabara and Jubel) through.…”