The action of Cu2+ on Bacillus thuringiensis growth investigated by microcalorimetry |
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| Authors: | Jun Yao Yi Liu Yong Tuo Jianben Liu Xiong Chen Qin Zhou Jiaxin Dong Songsheng Qu Ziniu Yu |
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| Affiliation: | Key Laboratory of Agricultural Microbiology of Chinese Agriculture Ministry, Huazhong Agricultural University, Wuhan 430070, P. R. China. |
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| Abstract: | By using an LKB-2277 Bioactivity Monitor, ampoule mode, the heat output of Bacillus thuringiensis growth metabolism has been determined at 28 degrees C and effect of Cu2+ on B. thuringiensis growth was studied. Copper has been regarded as an essential trace element for life. Its deficiency may be the cause of diseases. Cu2+ of different concentration have different effects on B. thuringiensis growth metabolism, Cu2+ of low concentration (0-30 micrograms/ml) can promote the growth of B. thuringiensis, and Cu2+ of high concentration (40-120 micrograms/ml) is able to inhibit its growth and B. thuringiensis can't grow at all when the concentration of Cu2+ is up to 130 micrograms/ml. |
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