The conversion of dehydroisoandrosterone to its ,B-D-glucopyranoside is readily effected by surviving slices of the potato tuber at pH 8. This reaction is largely limited to dehydroisoandrosterone and isoandrosterone, and is slowly reversed at pH 4 as the result of weak P-glucosidase-like activity. Potatoes also contain an active /?-glucuronidase which differs from known preparations in possess...

Abstract Background Blackleg and tuber soft rot are among the most important potato diseases caused by bacteria belonging to genera Pectobacterium . This pathogen causes significant economic losses each year. The antagonistic activity of different bacterial cultures against this was studied. Results Six hundred eight isolated from tubers rhizosphere soils procured locations across Morocco were ...

The ability of Fusarium oxysporum Schlect. to cause a rot of the potato tuber has been clearly demonstrated by a number of workers. The influence of temperature on this disease has been reported in a number of papers, but the experimental evidence as a whole is rather meager, usually only extreme temperatures being used. The effect of moisture on the progress of the disease, except under condit...

Potato crop in Egypt occupies 20% of the total area devoted for vegetable plantations and any disturbance in its production affects severely its local and export impact. Brown rot disease on potato is the most cereous disease affecting potato exportation. Therefore, competing such disease is an obligate practice to control the pathogenic causal bacterium. Biological control became recently an e...

pectobacterium carotovorum is one of the most important bacterial pathogens of potato in the world.the expression of numerous genes including those involved in the production of virulence determinants in this bacterium are regulated by quorum sensing (qs). the signal molecules involved in qs in p. carotovorum belong to the group of n-acyl homoserine lactones (ahls). recently, several soil bacte...

Marquez-Villavicencio, M. D. P., Groves, R. L., and Charkowski, A. O. 2011. Soft rot disease severity is affected by potato physiology and Pectobacterium taxa. Plant Dis. 95:232-241. Pectobacterium species cause disease worldwide in many crop and ornamental plants, including potato. A new Pectobacterium subspecies, P. carotovorum subsp. brasiliensis was recently described in Brazil and later fo...