Plasmids Roles in Virulence of Xanthomonas axonopodis pv. malvacearum (Xam) Races, the Causal Agent of Bacterial Blight of Cotton

ISSN: 0973-7510

E-ISSN: 2581-690X

Plasmids Roles in Virulence of Xanthomonas axonopodis pv. malvacearum (Xam) Races, the Causal Agent of Bacterial Blight of Cotton

Khalid A. Ali AbdelRahim^1,2 , M. M. Ibrahim^1,3 and Gehan A. El-Gaaly⁴

¹Department of Botany and Microbiology, College of Science, King Saud University P.O. Box 2455, Riyadh 11451, Saudi Arabia.

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

³Botany and Microbiology department, Faculty of Science, Alexandria University, Alexandria, Egypt P.O. Box 21511.

⁴Botany and Microbiology Department – Female section, College of Science, King Saud University P.O. Box 22452, Riyadh, 11495, Saudi Arabia.

J Pure Appl Microbiol. 2013;7(Spl. Edn.: November):219-232

Received: 06/09/2013 | Accepted: 28/10/2013 | Published: 30/11/2013

Abstract

Plasmids were obtained from strongly virulent Xcm strains ( HVS) and moderately virulent strains (6, 7, 10, 11 and 12) from different origin (USA, Nicaragua, Sudan, Burkina Faso, Turkey and Greece). Seventeen plasmid bands could be differentiated. The sizes ranged from 3.9 to 73.4 Mdal. The number of plasmid bands per strain varied from 1-6. On the average, each Xcm strain harboured 3 plasmid bands. Only one plasmid band (28.3 Mdal) was common to all Xcm-strains with two negative exceptions of the so-called HV strains. However, a correlation between specific plasmid profiles and strain origin was determined in several cases, independent of race designation. Our studies did not prove that the Xcm plasmids play a role in virulence or in resistance to antibiotics or heavy metal ions.

Keywords

Plasmid, Virulence, Bacterial Blight of cotton, Xanthomonas sp

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