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对产植酸酶的青霉菌株Ａ２进行了诱变研究。分别以ＨＮＯ２－ＵＶ和ＵＶ－５Ｂｕ复合处理，进行了二轮诱变筛选后，得到高于Ａ２５０％以上的变异株６株，其中Ａ２－ＵＶ５９－２０株的酶活达０．８１２±０．０１９ｕ／ｍｌ，为出发菌株Ａ２的二倍多。
Phytase-producing Penicillium strain A2 was mutagenized. After two rounds of mutagenesis and screening with HNO2-UV and UV-5Bu respectively, six strains with more than A250% were obtained, in which A2-UV59-20 strain had the activity of 0.812 ± 0. 019u / ml, more than twice as much as the starting strain A2.