%0 Journal Article
%T Responses of Microorganisms Producing Protease to Heavy Metal Stress<br>蛋白酶分泌菌对重金属胁迫的反应
%A MA Guo-Fang
%A WANG Jiang
%A ZHANG Chong-Bang
%A <br>马国芳
%A 王 江
%A 张崇邦
%J 微生物学报
%D 2008
%I 
%X Effects of Pb, Zn, Cu and Cd on growth and enzyme activities of microorganisms such as Bacillus licheniformis 2709, Bacillus subtilis1.398 and Aspergillus usamii 537, which can individually produce alkaline, neutral and acid protease, were studied, respectively. By determining growth and enzyme activities of three bacterial species, as well as analyzing their tolerance and resistance indicators (MTC and MIC) using growth inhibition plate analysis (GIPA) under different heavy metal gradients, results showed that four heavy metals under higher than a special concentration level significantly inhibited growth and enzyme activities of three species. The alkaline protease exhibited greatest adaptability to four heavy metals, next the neutral protease also exhibited certain adaptibilty to Zn and Cd, whereas the acid protease was totally inhibited under any levels of heavy metal concentrations. Three species not only showed great potential to tolerate and resist toxicity of lead and zinc (2.0 mmol/L-6.0 mmol/L), but also showed certain resistance to cadmium (0.5 mmol/L-0.75 mmol/L).
%K Strains producing protease
%K Heavy metals
%K Growth
%K Enzyme activity
%K Tolerance and resistance<br>蛋白酶分泌菌
%K 重金属
%K 生长
%K 酶活性
%K 耐性与抗性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=A3C6BA55AB623B90FA9104CFFC826F3C&aid=983B0A5193D53DE9F88E68E1A63E4686&yid=67289AFF6305E306&vid=6209D9E8050195F5&iid=B31275AF3241DB2D&sid=BCFCD9A5E22CA0BB&eid=FC0F5DAABDA587D7&journal_id=0001-6209&journal_name=微生物学报&referenced_num=0&reference_num=0