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核农学报  2013 

有机磷农药降解菌ZHJ6的γ辐照诱变

DOI: 10.11869/hnxb.2013.08.1150, PP. 1150-1155

Keywords: γ辐照,诱变,草酸青霉,降解

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Abstract:

为获取对甲胺磷农药降解率更高的菌株,利用60Co-γ射线对能够降解甲胺磷农药的草酸青霉ZHJ6进行辐照诱变研究。结果表明:草酸青霉ZHJ6对60Co-γ射线比较敏感,容易被辐照灭活,当吸收剂量继续增大,达到2.1kGy时,存活率变为0.04%左右。辐照后的菌株经过初筛和复筛,筛选出A17和A18两株菌株。筛选出的菌株比出发菌株A0的对甲胺磷的降解率要高出10%以上,而对氧化乐果、辛硫磷和草甘磷的降解能力也增强。经过连续5代传代培养,诱变菌株在第6d对甲胺磷农药的变异系数为1.2%,遗传特性稳定性好。

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