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苜蓿青贮用乳酸菌复合系Al2的组成多样性

Wei sheng wu xue bao = Acta microbiologica Sinica(2006)

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Abstract
苜蓿是高蛋白的饲料作物,青贮是保存青草过冬的主要手段,但苜蓿是难青贮的作物,添加乳酸菌制剂是解决苜蓿青贮难的有效措施。本研究室通过连续的限制性培养筛选到苜蓿青贮用乳酸菌复合系Al2,用变性梯度凝胶电泳(DGGE)、平板分离及建立16S rDNA克隆文库3种手段相结合分析Al2的组成多样性,确认Al2复合菌系由7株菌组成,全部属于Lactobacillus。其中3株菌Al2-1i,Al2-2i,Al2-3i通过平板分离得到,分别属于L.plantarum(99.9%)、L.kimchii(99.4%)、L.farciminis(100%)。在Al2复合菌系的16S rDNA克隆文库中,上述7种菌的组成比例分别为55.21%、19.79%、14.58%、3.13%、3.13%、3.13%、1.03%。
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Key words
community,composition diversity,16s rdna clone library,dgge,lactic acid bacteria(lab)
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