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《Biotechnology》 2007-04
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Isolation and Morphology Study of Pathogenic Microflora in Natural Populus euphratica Oliver Stand of Tarim River Valley

WANG Ning,SHENG Guang,DENG Ai-hua,WANG Ling,JI Jia,Erkin Rahman(College of Life Science and Technology,Xinjiang University,Urumqi 830046,China)  
Objective:Populus euphratica oliver was the only arbor that could survive in this area.Sample sites were fixed on a wadi which had been abandoned hundred years before in the middle and lower reaches of Tarim river valley.Sick tissues were gathered from leafs,stems which had different symptoms.Microorganisms were isolated from them later.Methods: Morphology observation in microscope,Gram strain,and Physiological and biochemical tests.Results: 13 bacteria and 4 mildew were isolated by morphology observation.Among them,7 bacteria were isolated from sick leafs of P.euphratica oliver,6 bacteria and 4 mildew were isolated from suffering barks.The result of Gram dye showed that 2 bacteria strains were Gram-negative,the others were Gram-positive.Conclusions: This experiment accumulated datum for Populus euphratica oliver stand degradation by microorganism infection for the first time.
【Fund】: Chinese Education Ministry Programfor Science and Techn-ology(30471405)Open Project Program of Key Laboratory of Oasis Ecology(Xinjiang university)Ministry of Education(XJDX-0201-2007-07)
【CateGory Index】: S763.7
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