Nodules occupied by the marked strain turned blue in the GUS staining buff, while others occupied by the indigenous rhizobia didn't.

标记菌株形成的根瘤可被GUS染色缓冲液染成蓝色，而土著菌形成的根瘤不能着色。

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The results of GUS staining showed that NPC2 expressed mainly in meristematic zone, elongation zone and vascular tissue of maturation zone of root tip;

GUS染色显示NPC2在根中主要是在根尖分生区和伸长区表达，在成熟区主要是在维管组织中表达；

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BTH had a higher efficiency to induce GUS expression than SA indicated by GUS staining strength and had no phytotoxicity to plant within effective concentration.

化学诱导剂BTH的诱导效率高于SA，且在有效诱导浓度范围内对植株没有生理毒性或所产生的生理毒性难以从表象观察到。

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