| 1. | Metabolic activity quickly develops in the cells of the embryo and the aleurone layer .
胚细胞和糊粉层中的代谢活性立即活跃起来。 |
| 2. | Extraradical hyphal growth was inhibited at high p levels , resulting in decreased p uptake by am fungi
高磷造成am真菌生长和代谢活性下降，是导致菌根效应下降的原因之一。 |
| 3. | Bilateral mandibular premolar teeth of rabbits were extracted under abdomen anesthesia ( 2 % glutababituratic acid ) , then l2 titanium implants were placed into the teeth extraction holes of one side and left the other side to be the control one
结论:多糖-蛋白复合物在钛种植体形成骨附着及维持钛的生物相容性方面可能具有重要作用,并推测其与骨代谢活性密切相关。 |
| 4. | The growth of extraradical hyphae and metabolic activity of am fungi changed with the application rate of fertilizer p added to the soil . fungal metabolic activity decreased with increasing addition of inorganic p to the soil and increasing plant p concentration
主要研究结果如下：不同的施磷水平对am真菌生长和代谢活性有一定的调控作用，随着施磷量的增加、植物磷含量提高， am真菌代谢活性呈下降趋势。 |
| 5. | Previous studies have focused mainly on the influence of am fungi on the physiology of the host plant , and there are few published reports on the influence of the host plant on the growth and metabolic activity of am fungi
前人有关丛枝菌根共生体的研究大多偏重于真菌对宿主植物的生态效应方面，而在宿主植物对菌根真菌生长与代谢活性的效应方面，现有的研究还不深入，许多认识仍停留在经验性或推测的水平上。 |
| 6. | The am fungus could obtain adequate carbon resources for itself , thus ensuring normal growth and metabolic activit y owing to the efflux of carbohydrate from the plasma membrane of the host root cortical cells to the interface of the symbiosis . thirdly , the structure and composition of the root cortex cellular plasma membrane kept good integrity and the leakage of carbohydrate maintained at low level when the plant obtained enough p and metabolizes normally . although enough carbohydrate was synthesized by plant , the am fungi could not obtain enough energy , resulting in inhibition of growth of the extraradical hyphae and decreased metabolic activity of the am fungi
由此，我们认为植物磷营养状况调控菌根真菌生长和代谢活性的机制是：当植物处于严重缺磷胁迫时，不能合成足够的碳水化合物供给自身生长的需要，也不能向真菌提供额外的碳水化合物，因而菌根真菌生长受阻，代谢活性较低；当植物中度缺磷时，根皮层细胞质膜的组成和结构不完整，通透性大，碳水化合物通过质膜向外的渗漏量大，菌根真菌因而获得充足的碳源，保证真菌正常的生长和旺盛的代谢；当植物获得足够的磷而使体内磷营养代谢正常时，其细胞质膜组成和结构完整，碳水化合物的渗漏量保持在较低的水平，尽管此时植物合成了足够的碳水化合物，但菌根真菌仍不能获得足够的能量，导致真菌生长受阻和代谢活性降低。 |
| 7. | ( am ) fungi exhibit low host specificity and form mutualistic associations with a wide range of host plant species over a wide range of environmental conditions . some characteristics of am fungi , including hyphal growth , distribution and metabolic activity , are closely related to mycorrhizal efficiency and to ecological function of am fungi , and may be influenced by host plant and soil conditions
丛枝菌根共生体由宿主植物和真菌共同组成，菌根真菌的生长、代谢活性、菌丝分布以及生态适应性等特征不但与菌根效应、菌根真菌的生态功能密切相关，而且受到宿主植物和土壤条件的影响。 |
| 8. | Biodiversity exists among am fungi and is influenced by numerous factors including soil properties and plant species . if am fungi are to be used in sustainable agricultural systems it is necessary to study native am fungi in the target areas and then select efficient isolates that can be applied as inocula in the field to improve crop growth . the objectives of this study were to investigate the germplasm of am fungi , to understand the distribution pattern of am fungi in different ecological conditions such as area , soil factor and host plant , to select isolates effective in nutrient acquisition by the host plant sweet potato , to test their effectiveness under field conditions , and to monitor amf after their introduction into the field
本研究通过调查我国北方部分地区的am真菌资源，研究了am真菌的种群组成及其在空间、土壤利用方式和宿主植物类型等不同环境条件和空间尺度上的分布规律；在此基础上，根据它们对甘薯的生长、吸磷效应筛选出高效菌株，在大田条件下研究了am真菌菌丝的分布特性、代谢活性及其对甘薯产量和品质的影响；并通过分子探针跟踪调查了引入am真菌在共生体中的发育和表达，以期为菌根真菌的生产应用提供技术支持。 |
| 9. | Result the fresh and freeze - stored fascial chondrocytes were superior to free grafts of chondrocytes in potentiality of formation of new cartilaginous tissue , structure and metabolism of newly formed tissue . relatively good results were also obtained similarly by using fresh autografts of periosteum and cartilage
结果新鲜和冻存的筋膜软骨细胞移植在结构、形成新的软骨组织能力、代谢活性方面均优于游离软骨细胞移植；新鲜的自体骨膜和软骨移植同样可获得较好的结果。 |
| 10. | A hypothesis was suggested as following : firstly , the host plants could not synthesize enough carbohydrate to meet their own growth requirements and those of the fungus when the plant in experiment conditions of severe p deficiency . as a result , extraradical hyphal growth and am fungal metabolic activity were inhibited and therefore decline
宿主植物磷营养状况较差时，菌根真菌生长和代谢活性旺盛；宿主植物磷营养状况较好时，菌根真菌生长和代谢活性受到抑制，表明宿主植物的磷营养状况对am真菌的生长和代谢活性具有调控作用。 |
