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Volume :1 Issue : 1 1974      Add To Cart                                                                    Download

FURTHER STUDIES ON THE SOIL BACTERIA IN THE DESERT OF KUWAIT

Auther : MOHAMED HASHEM AND ALI DIAB

Department of Botany, University of Kuwait

 

Abstract

 

Five localities in the desert of Kuwait were studied for their bacterial flora during two months: December 1969 and September 1970. Samples were collected from both the rhizosphere region and the soil apart of the dominant flowering plant in each locality. Viable counts were made for both total bacteria and actinomycetes on several media. The results are discussed in relation to environmental conditions. The importance of temperature and salinity is emphasized. It is suggested that the combined effect of both factors is the major factor at work whenever halophilic bacteria are involved. The actinomycetes isolated from three localities were identified for their generic composition. Isolates belonging to the genus Streptomyces were identified as far as the species. The genera recorded were: Yicropolyspora, Nocardia and Streptomyces. Streptomyces nawi sp. nov. proved to be a new species. Within the three localities, locality I where Halocnemon strobilaceum is the dominant plant was found to be of particular interest. The actinomycete flora was very specific. Thus, in the rhizosphere, all isolates except three belonged to the species Streptomyces griseoluleus. In the soil apart, all isolates belonged to the genus Nocardiu except for one isolate which was identified as Streptomyces viridochronzogenes.

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