链霉菌属的两个新种

TWO NEW SPECIES OF STREPTOMYCES

从陕西省武功县的土壤中分离到二株链霉菌,编号为78-113和78-118。其气生菌丝体分别为淡蓝及浅灰蓝,基内菌丝体为蓝色和棕色。螺旋形孢子丝随着培养过程逐渐盘卷成球形或亚球形的团状体,未观察到硬的孢囊壁,类似假孢囊,盘卷的分生孢子链清晰可见。经鉴定,认为是链霉菌属的两个新种,命名为蓝色假孢囊链霉菌(Streptomyces cyaneo-pseudosporangius n.sp.)和微蓝灰假孢囊链霉菌(sgreptomyres plumbeo-pseudosporangius n.sp.)。

Two new strains of Streptomyces, strain 78-113 and strain 78-118, were isolated from soil samples taken in Shaanxi province, China. Both strains can form light blue aerial mycelium with spiral spore chains, and the spore chains wind into spherical or subspherical structures, which, here, are named as pseudoporangia Spores are oval or rod in shape with smooth surface. The composition of cell wall of these both strains is as same as Type Ⅰ. But the colours of the substrate mycelium of these two strains are different, nor are their colours of soluble pigment. The studies of their morphological, cultural, physiological and biochemicul chracteristics have shown that these two strains are different from all known species of Streptomyces. So they represent two new species and therefore the following names have been proposed: Strain 78-113 is named Streptomyces cyaneo-pseudosporangius n. sp. Strain 78-118 is named Streptomyces plumbeo-pseudosporangius n. sp.