嗜碱放线菌生理学特性的初步研究*

对从新疆、青海采集的盐碱土样中分离获得的29株嗜碱放线菌(AlkAlipbilic actinomyeetes)及1株模式菌株Nocardiopsis prasina的pH实验，不同碱性物质KOH、K2CO3、NaOH、Na2CO3对生长的影响，及对NaCl、KCl耐受性进行了研究。结果发现，少数嗜碱放线菌对Na^ 有一定的依赖性，对K^ 碱性物质敏感；一些嗜碱放线菌对CO3^2-敏感，NaCl、KCl对一些嗜碱放线菌的生长有抑制作用；4种碱性物质对Nocardiopsis菌株生长无影响，且它们可耐受高浓度NaCl、KCl。因此提出高碱性环境中是否存在K^ 、CO3^2-专一性依赖的嗜碱放线菌的推测。

PRELIMINARY STUDIES ON PHYSIOLOGICAL CHARACTERISTICS OF ALKALIPHILIC ACTINOMYCETES

pH, affects of different alkaline materials KOH, K 2CO 3, NaOH, Na 2CO 3 on the growth, and NaCl, KCl tolerance of 29 isolates from the saline and alkaline soils in Xinjiang and Qinghai Provinces of China and 1 type strain were studied. Results showed that only a few alkaliphilic actinomycetes were Na +-obligately dependent, and K +-sensitive. Some alkaliphilic actinomycetes were CO 3 2- -sensitive, and NaCl, KCl could inhibit their growth. 4 kinds of alkaline materials had no affect on growth of alkaliphilic Nocardiopsis, and these strains showed high tolerance to NaCl, KCl. So it was presumed that only K + and CO 3 2- obligately dependent alkaliphilic Actinomycetes maybe exist in alkaline environments.