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对北方地区大豆根瘤菌的生物学特性进行了较为系统的研究,结果表明,黑、辽地区分离、纯化的17株根瘤菌均具有典型的根瘤菌的个体形态和菌落特征,生理生化指标接近,可与辽豆15共生结瘤,分为快生菌和慢生菌。所有根瘤菌均可不同程度地利用供试的5种碳源。耐酸碱度、耐盐性及温度敏感实验表明,菌株HS3可在pH6.0~9.0生长,菌株HH4可耐受1.5%氯化钠,菌株HH4,HH2可在13℃~39℃生长。
The biological characteristics of soybean rhizobia in northern China were systematically studied. The results showed that all the 17 Rhizobium strains isolated and purified in Heilongjiang and Liaoning Provinces had the typical morphology and colony characteristics of rhizobia, the physiological and biochemical indexes were close, Coexistence with Liao bean 15 nodules, divided into fast-growing bacteria and slow-growing bacteria. All rhizobia could utilize the five carbon sources tested to varying degrees. Resistance to pH, salt tolerance and temperature-sensitive experiments showed that the strain HS3 can grow at pH 6.0-9.0. The strain HH4 can tolerate 1.5% sodium chloride. The strains HH4 and HH2 can grow at 13-39 ° C.