节点文献

动物的共生菌固氮

Nitrogen fixation of symbiotic bacteria in animals

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 金明霞王怡嵇保中刘曙雯徐立军张磊熊佳新喻爱林谢谷艾

【Author】 JIN Mingxia;WANG Yi;JI Baozhong;LIU Shuwen;XU Lijun;ZHANG Lei;XIONG Jiaxin;YU Ailin;XIE Gu’ai;Co-Innovation Center for Sustainable Forestry in Southern China;College of Forestry,Nanjing Forestry University;The Administration Bureau of Dr.Sun Yat-sen’s Mausoleum;

【通讯作者】 嵇保中;

【机构】 南京林业大学南方现代林业协同创新中心南京林业大学林学院南京中山陵园管理局

【摘要】 介绍了共生菌固氮涉及的动物和微生物类群、动物共生菌固氮的性质和机理。应用乙炔还原法和固氮酶基因检测等研究表明,所涉及的动物有7门13纲23目50科99属174种。动物肠道具有丰富的微生境,供不同生理需求的固氮菌生长发育,所蕴含的共生固氮菌类群也十分丰富,涵盖植物共生固氮菌、植物内生固氮菌、植物根际固氮菌、自生固氮菌等生态类型。一般认为动物共生固氮菌来源于环境,其性质属于联合共生固氮。动物共生固氮菌一般与其他共生生物形成复合体,以满足固氮过程中对电子和质子供体、能量供给、固氮酶活性保护以及氨阻遏解除等方面的需求。动物共生菌固氮产物氨的同化也需要多种共生物的协同作用,可能通过谷氨酰胺合成酶/谷氨酸合成酶等途径。总体上,食物氮、非蛋白氮和共生菌固氮相互协调,形成营养和解毒的代谢网络,共同维持动物体内氮素营养的动态平衡,并对未来研究提出展望。

【Abstract】 In this paper, we reviewed the symbiotic association between animals and nitrogen-fixing bacteria and the nature and mechanism of symbiosis. A total of 174 species of animals in 7 phyla, 13 classes, 23 orders, 50 families, and 99 genera were evaluated in this paper, and they were found to use acetylene reduction and gene detection of nitrogenase. The animal gut has a rich microbial environments, which meets the growth and development demands of nitrogen-fixing bacteria. As a result, the animal guts were rich with symbiotic nitrogen-fixing bacteria of different ecological types, such as those that are symbiotic with plants, those that are endophytic diazotrophs, nitrogen-fixing bacteria from the rhizospheres, and Azotobacter. It is generally believed that animal symbiosis with nitrogen-fixing bacteria stems from the environment. The nature of animal symbiosis with nitrogen-fixing bacteria belongs to associative nitrogen fixation. Nitrogen-fixing bacteria that are symbiotic with animals coordinate with other symbiotic organisms to meet the needs of electron and proton donors, energy supply, nitrogenase activity protection, and ammonia repression relief during nitrogen fixation. The assimilation of ammonia during nitrogen fixation is also involved in the synergies of different symbiotic organisms and might be carried out through the pathway of glutamine synthetase/glutamate synthetase.In general, food nitrogen, non-protein nitrogen, and nitrogen-fixing symbiotic bacteria coordinate with each other to form a metabolic network of nutrition and detoxification to maintain the homeostasis of nitrogen nutrition in animals. The prospects of nitrogen fixation of animal symbionts were also identified in this paper.

【基金】 南京林业大学南方现代林业协同创新中心资助项目;高等学校博士学科点专项科研基金项目(20123204110001);江苏省自然科学基金项目(BK2012816);南京市建委,中山陵园管理局资助课题(201409);江苏省农业科技自主创新项目(CX(16)1005);江西省林业科技创新项目(201613);江西省科技支撑项目(20151BBF60073)
  • 【文献出处】 生态学报 ,Acta Ecologica Sinica , 编辑部邮箱 ,2019年10期
  • 【分类号】Q958.12
  • 【被引频次】1
  • 【下载频次】242
节点文献中: 

本文链接的文献网络图示:

本文的引文网络