Plasmids in Different Races of Xanthomonas campestris pv. malvacearum (Xcm), Synonym, Xanthomonas axonopodis pv. malvacearum (Xam), The Causal Agent of Bacterial Blight of Cotton

ISSN: 0973-7510

E-ISSN: 2581-690X

Plasmids in Different Races of Xanthomonas campestris pv. malvacearum (Xcm), Synonym, Xanthomonas axonopodis pv. malvacearum (Xam), The Causal Agent of Bacterial Blight of Cotton

Khalid A. Ali AbdelRahim^1,2 and Klaus Rudolph³

¹Botany and Microbiology Department, Faculty of Science, P.O. Box 2455, Riyadh 11451, King Saud University, KSA.

²Botany Department, Faculty of Science, Sohag University, Sohag 82524, Egypt.

³Institute of Plant Pathology and Plant Protection, University of Göttingen, Grisebachstr. 6, D-37077 Göttingen, Germany.

J Pure Appl Microbiol. 2013;7(3):2243-2249

Received: 30/10/2012 | Accepted: 17/12/2012 | Published: 30/09/2013

Abstract

Nine strains belonging to 2 races of Xanthomonas axonopodis pv. malvacearum (Xam) were screened for their plasmid content. One Strain belonging to race 4, and has been attenuated as mutant from race 18 strain and show low virulence than race 18, despite it possesses the same plasmids of race 18 strains. According to plasmid profiles of these strains, 5 groups could be distinguished. First group includes the strain of race and 4 strains of race 18 isolated from Nicaragua, 1986. The other 4 strains of races 18, isolated from Nicaragua, 1986; USA, 1986; Sudan 1991 were distinguished in 4 distinct groups according of their plasmid profile. The attenuated strain of race 4 was more sensitive to antibiotics and heavy metal ions than race 18 strains. No indication that plasmids play a distinct role in virulence of Xam strains.

Keywords

Plasmid, Xanthomonas, Antibiotics, Heavy metals

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