A Biosensor-Based Leaf Punch Assay for Glutamine Correlates to Symbiotic Nitrogen Fixation Measurements in Legumes to Permit Rapid Screening of Rhizobia Inoculants under Controlled Conditions.
豆科植物通过根瘤菌共生固氮(SNF)将大气氮转化为可用氮,但作物品种与根瘤菌菌株间不兼容或次优互作常导致固氮率下降。为低成本、高通量筛选根瘤菌接种剂,作者建立了一种基于叶片打孔的全细胞生物传感器检测方法。该方法利用GlnLux生物传感器,即谷氨酰胺(Gln)营养缺陷型大肠杆菌菌株表达组成型lux操纵子,在检测到Gln后产生生物发光。...