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;
The middle region was composed of meristematic tissue whose cells had high proliferative activity ( Plate Ib). 中层区是由增殖能力旺盛的分生组织细胞所构成;
When the mature heart-shape embryo proceeds with the development that leads to the formation of the torpedo stage, the procuticle, meristematic tissue and protocambium have differentiated obviously. 心形胚继续发育形成鱼雷期胚时,原表皮、基本分生组织和原形成层的分化已经比较明显。