| 1. | Cells of the procambium and ground meristem are more vacuolated than those of the protoderm .
原形成层和基本分生组织的细胞比原表皮层细胞更加液泡化。 |
| 2. | The stele includes all primary tissues derived from the procambium consists of pericycle，phloem and xylem .
中柱包括从原形成层衍生而来的全部初生组织，由中柱鞘、韧质部和木质部组成。 |
| 3. | Primary xylem xylem derived from the procambium in the young plant
初生木质部：指幼嫩植物中来源于原形成层的木质部。 |
| 4. | Primary phloem phloem derived from the procambium in the young plant
初生韧皮部：指幼嫩植物中来源于原形成层的韧皮部。 |
| 5. | Protoxylem the primary xylem elements that are formed from the procambium first
原生木质部：初生木质部的成分，最早由原形成层形成。 |
| 6. | Procambium ( procambial strand ) the layer of cells that gives rise to the vascular tissue
原形成层（原形成层束） ：形成维管组织的一层细胞。 |
| 7. | Primary vascular tissue , which is found in all vascular plants , is formed from the procambium
初生维管组织由原形成层发育而来，在所有维管植物中都有存在。 |
| 8. | Protophloem the first - formed primary phloem , differentiated from the procambium in the region just behind the meristem
原生韧皮部：最早形成的初生韧皮部，由位于分生组织中的原形成层分化而来。 |
| 9. | 7 - 10 days " seedlings after the seeds germinated , the meristem in the stem apex functioned to form true leaf primordium , meanwhile , the vessel elements which differentiated from parenchymatous cells of the middle and upper portion of the cnz connected with the vessel elements from procambium of epcotyl - shoot region
种子萌发7 - 10天，幼苗的茎端分生组织活动形成真叶雏形，此时由子叶节区中、上部薄壁细胞的转分化形成的导管分子与上胚轴-苗区原形层形成的导管分子发生连接。 |
| 10. | Signals were strong in the cell periphery of procambium , and longitudinal signals were stronger than lateral ones ; in root ground meristem cytoplasm , concentration in the perinuclear region was stronger than one in the cell periphery . in cell periphery of root ground meristem , distribution of actin mrna was heterogeneous , longitudinal signals were stronger than lateral ones ; in callus meristem cytoplasm , concentration in the perinuclear region was low ;
这表明，从棉花愈伤组织薄壁细胞到鸟巢状管胞团再到正常苗的过程中肌动蛋白mrna的分布和浓度都有明显的变化，而在这里愈伤组织在分化到鸟巢状管胞团后就不再继续发育，因而推测，肌动蛋白mrna分布和浓度可能影响愈伤组织分化出正常的植株。 |
