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Volume :14 Issue : 1 1987      Add To Cart                                                                    Download

Pathological and bacteriological characteristics of bacterial isolates causing soft rot of potato in the Sudan

Auther : AWAD M. ABDEL-RAHIM* AND FATMA S. ADAM

Department of Crop Protection, Faculty of Agriculture, University of Khartoum,

Shumbat, Sudan

 

ABSTRACT

 

Isolation of soft rot bacteria was made from potato tubers and soil samples collected from

different districts of potato production. The bacterial isolates induced hypersensitive reactions on tobacco leaves and produced typical blackleg and soft-rot symptoms on potato plants and tubers, respectively. A wide range of fruits and vegetables were also found susceptible to the isolates.

 

Morphological, biochemical and physiological characterization of the isolates proved that

they all belong to the Erwinia carotovora group. All are gram negative, motile, non-spore forming and capable of producing various chemical compounds and enzymes. Although all were able to produce acid and gas from the tested carbohydrates, only two of them utilized maltose and glycerine.

 

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