| 1. | Mycorrhizal research on nitrogen - fixing plants
固氮菌的溶磷性和分泌植物生长素特性测定 |
| 2. | Preliminary study on associative - nitrogen - fixing of wheat rhizoesphere in guanzhong region
关中地区小麦根际联合共生固氮菌的初步研究 |
| 3. | The effect of long - term organic wastewater irrigation on the soil nitrogen - fixing bacteria population
长期有机污水灌溉对土壤固氮细菌种群的影响 |
| 4. | Yield - improving effect of rhizosphere associate nitrogen - fixing bacteria on maize wheat and sweet potato
根际联合固氮菌对玉米小麦及红薯的增产效应 |
| 5. | Associative nitrogen - fixing bacteria in the rhizosphere of avena sativa in an alpine region isolation and identification
兰州地区盐碱地小麦根际联合固氮菌分离及部分特性研究 |
| 6. | Coralloid roots a type of root regularly produced by cycads , which contains symbiotic nitrogen - fixing cyanobacteria in root nodules , giving the roots a knobbly coral - like appearance
珊瑚状的根：由苏铁类植物产生的一种类型的根，根瘤中含有共生的固氮蓝细菌，使根形成珊瑚状的有节的形状。 |
| 7. | Analysis of the sequence revealed that adda resembled nifs of nitrogen - fixing bacteria and dnda . the entire add gene cluster showed 78 % identity to dnd gene cluster from s . lividans
同源性比较揭示add基因簇的adda基因与固氮酶基因nifs高度同源， add与变铅青链霉菌dnd核苷酸的同一性为78 。 |
| 8. | Cycadophyta ( cycads ) a phylum of cone - bearing gymnosperms ( about 75 living species ) with palmlike compound leaves and special coralloid roots at or near the ground surface , which contain symbiotic nitrogen - fixing cyanobacteria
苏铁纲（苏铁类植物） ：包含球果的一类裸子植物（现存种大约有75种） ，它们具有掌状的复叶，在近地面处有特殊的珊瑚状的根，根内含有共生的固氮蓝细菌。 |
| 9. | The paper reviews home and overseas research works on exhumation and use of nitrogen - fixing resource , genetics engineering of nitrogen fixation , and biochemistry of nitrogenase and chemical modeling of biological nitrogen fixation , and describe the prospect of biological nitrogen - fixing research
本文从固氮资源的发掘和利用、固氮的遗传工程以及固氮酶生物化学和化学模拟生物固氮三方面对国内外的研究进展进行了全面的阐述，并对生物固氮研究的前景进行了展望。 |
| 10. | Many legume plants may produce the beneficial isoflavones , which are vital to the formation of nitrogen - fixing root - nodules and the disease resistance response of plants . white clover ( trifolium repens ) , a high quality legume forage , however , has little isoflavones . to improve the isoflavone contents of such forage , an available strategy is to introduce gene ( s ) encoding the key enzyme ( s ) in the biosynthesis pathway of insoflavones
许多豆科植物中都含有异黄酮类化合物，异黄酮对植物根瘤的形成和植物的防御反应至关重要，但是在牧草白三叶中缺乏这种有益的化合物，因此通过转基因实验将异黄酮合成酶基因导入白三叶中，提高其异黄酮的含量，增加白三叶的营养价值。 |
