新疆干旱荒漠地区五株低营养细菌的理化特性研究

Study on the Physiological and Biochemical Properties of Five Strands of Oligotrophic Bacteria in Arid Deserts in Xinjiang

低营养菌又称寡营养菌,属于特殊环境微生物类群[1]。通过对新疆荒漠地区分离得到的五株低营养细菌的理化特性研究,初步摸索到了分离培养的方法,并测得其生长温度范围和最适温度37℃;最适pH值8～9;最适含碳量15 mg/L培养基,生长需要1%～20%的NaCl浓度,以及一系列生理生化反应指标,为特殊环境微生物尤其是低营养微生物的研究提供了一些新的思路和理论依据。

The bacteria with low nutriments are called “oligotrophic bacteria” and belong to the microorganisms inhabiting under the peculiar environment. Five oligotrophic bacteria were isolated and purified from the desert regions in Xinjiang. After studying their physiological and biochemical properties, the methods of cultivating and separating the oligotrophic bacteria are derived, and a series of indexes in physiological and biochemical reactions were measured. It is derived that the optimal temperature, optimal pH value, optimal carbon content in media and concentration of NaCI for the growth of oligotrophic bacteria are 37 ℃, 8-9, 15 mg/L and 1%-20% respectively, which can provide the new conception and theoretical foundation for researching the microorganisms, inhabiting under the peculiar environmental, especially the oligotrophic microorganisms.