Abstract

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Mesophilic and cryogenic actinomycetes were isolated from water, quagmire soil , lakeside soil and saline wasteland soil in the Qinghai Lake by spreading samples on three kinds of agar media , in which content of NaCl was 70 g/ L. They were characterized according to routine methods, and detected their salt-tolerance. The results indicated that there were salt-tolerant, mesophilic and cryogenic actinomycetes in quagmire and lakeside soil of the Qinghai Lake and in saline wasteland soil nearby the Qinghai Lake. The amount in wasteland soil was the largest , followed by lakeside and swamp soil. All of the salt-tolerant actinomycetes identified were Streptomyces (92. 6 % of total) , and they were all albsporus. And 47.6 %, 19.0 %, and 33.3 % of the tested actinomycetes could tolerant NaCl concentration at 70 g/ L, 100 g/ L, and 150 g/ L respectively.

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