Cercós A P
Rev Asoc Argent Microbiol. 1977 Jan-Apr;9(1):17-21.
In the course of a study on antibiotic activity of microorganisms isolated from soil samples from Port Stanley, Islas Malvinas, Argentina, four thermophilic Actinomycetes were sudied. The four strains had the same morphological and physiological characteristics. The new species belonged to Seccion Rectiflexibilis genus Streptomyces and had the following characteristics: sporophores straight, round spores of 1,5 or 2 millimicron in diameter. The colonies in agar meat peptone were round, flat, mealy, with fimbriate edges, odorless, friable, easy to emulsify and the aerial mycelium was white to light gray. The sporulation was rapid (less of 24 hours at 50 degrees C), the microorganisms grew in media with organic nitrogen and his ability to utilize carbon was scarce, only a trace of growth was detected with manitol (20 days at 50 degrees C). No growth was observed in gliceril-asparagine agar and the utilization of glucose was scarce or absent. It produced coagulation and peptonization of milk and liquifaction of gelatin. Neither was starch hidrolized nor nitrate reduced. The optimun growth temperature was between 45 - 60 degrees C. Very resistant to high temperatures having a thermal death point of more that 2 hours at 100 degrees C. It produced SH2.
在对从阿根廷马尔维纳斯群岛斯坦利港土壤样本中分离出的微生物的抗生素活性进行研究的过程中，对4株嗜热放线菌进行了研究。这4个菌株具有相同的形态和生理特征。该新物种属于链霉菌属直弯孢菌组，具有以下特征：孢子丝直，孢子圆形，直径为1.5或2微米。在琼脂肉胨培养基上的菌落圆形、扁平、粉状，边缘呈流苏状，无气味，易碎，易于乳化，气生菌丝体为白色至浅灰色。孢子形成迅速（在50℃下少于24小时），这些微生物在含有有机氮的培养基中生长，其利用碳的能力较差，在甘露醇培养基中仅检测到微量生长（在50℃下培养20天）。在甘油-天冬酰胺琼脂中未观察到生长，对葡萄糖的利用较少或没有利用。它能使牛奶凝固和胨化，使明胶液化。既不水解淀粉也不还原硝酸盐。最适生长温度在45-60℃之间。对高温具有很强的抗性，在100℃下热死点超过2小时。它产生H2S。
