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白腐真菌落叶松锈迷孔菌产漆酶液体培养基的优化及其对染料的脱色作用

Biotechnology Bulletin(2020)

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Abstract
以白腐真菌落叶松锈迷孔菌(Porodaedalea laricis)胞外漆酶为响应值,通过将Plackett-Burman设计、最陡爬坡设计和Box-Behnken设计相结合,获得了P.laricis产胞外漆酶的最适培养基为:去皮马铃薯365.61 g/L、蛋白胨5.0 g/L、葡萄糖20.0 g/L、KH2PO41.0 g/L、MgSO4·7H2O 0.5 g/L、MnSO4·H2O 0.15 g/L、CaCl2·2H2O 0.03 g/L、酒石酸铵6.68 g/L、琥珀酸钠1.5 g/L、吐温800.48 mL/L、玉米芯46.43 g/L、维生素B10.01 g/L.在该条件下,P.laricis漆酶活性为3.29 U/mL,相比于优化前提高了2.81倍,与理论值3.32 U/mL相近,说明该模型准确可靠.此外,将漆酶应用于降解多种合成染料包括活性亮蓝X-BR、雷马素亮蓝R、酸性黑172、刚果红、亚甲基蓝、中性红、靛蓝、萘酚绿B和结晶紫,反应168 h后脱色率分别可达到95.64%、97.21%、36.11%、91.63%、61.42%、74.65%、48.60%、25.13% 和68.80%.
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