The Relationship of Potato Bacterial Soft Rot Disease with Reduced Sugar Content of Potato Tubers and Calcium

Hamid Mustafa Khlaif, Bilal Ibrahim Wreikat


Bacterial soft rot caused by Pectobacterium carotovorum subspecies carotovorum is among the important diseases of potato causing economic losses. A study was conducted in order to test the susceptibility of 5 different potato cultivars to the artificial inoculation with 107 Cfu/ml of the suspension of the causal agent Pectobacterium carotovorum subspecies carotovorum and the relationship of their susceptibility to reducing sugar and calcium contents of the tested potato cultivars tubers. The results of the study showed that all the tested potato cultivars were found to be susceptible to the artificial inoculation of the disease where Spunta was found to be the most susceptible cultivar, while Ajax was the lowest one. At the same time, a positive correlation was found between the reducing sugar content of the tested potato cultivars tubers and of the susceptibility to soft rot. Specifically, Spunta, the highest susceptible one, was found to have the highest reducing sugar content, in the meantime Ajax the lowest susceptible one had the lowest reducing sugar content. On the other hand, a negative correlation was found in relation to calcium peel content, where the results showed that Spunta the highest susceptible one had with the lowest calcium content and Ajax the lowest susceptible one had the highest calcium content.


Pectobacterium carotovorum subspecies carotovorum, resistant, susceptibility

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