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内生真菌(Alternaria oxytropis)酵母氨酸还原酶基因功能互补株的构建及筛选鉴定

Molecular Plant Breeding(2020)

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Abstract
本研究构建内生真菌酵母氨酸还原酶基因(saccharopine reductase,sac)功能互补载体pBARGPE-Sac,制备sac缺失突变株M1的原生质体,将pBARGPE-Sac载体转化至M1原生质体后再生,构建和筛选出互补株C1.用RT-PCR技术检测转化子,并进行DNA测序,验证互补株.提取C1、M1及野生株OW7.8的苦马豆素(Swainsonine,SW),用HPLC-MS检测含量.结果显示:Cl中检测出sac和hph的表达,sac cDNA测序正确.C1的SW水平高于OW7.8和M1(p<0.01),说明sac促进了该内生真菌中SW的合成.通过对sac功能的研究,为明晰真菌SW合成途径提供基础数据.
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