Enterobactersp.NG-33菌株对玉米根系及植株中氮磷钾含量的影响  

Effect of Enterobacter sp. NG-33 Strain on Root and the Nitrogen,Phosphorus and Potassium Content in Plant of Maize

作　　者：陈鑫鑫[1] 罗奕璇 唐皓[1] 李有志[1] 樊宪伟[1] 

机构地区：[1]广西大学生命科学与技术学院,教育部微生物与植物遗传工程重点实验室,亚热带农业生物资源保护与利用国家重点实验室,南宁530004

出　　处：《基因组学与应用生物学》2017年第8期3273-3277,共5页Genomics and Applied Biology

基　　金：科技基础性工作专项西南喀斯特地区特色微生物资源及多样性调查项目(2014FY120100)资助

摘　　要：Enterobacter sp.NG-33是新筛选分离到能高效溶解不溶性无机磷且产吲哚乙酸的菌株。本研究采用盆栽方式,分析在黄潮土与缺磷土壤中,接种Enterobacter sp.NG-33对苗期玉米的根系发育及植株中氮磷钾含量的变化,探索菌株NG-33在不同土壤条件对苗期玉米生长的促生机制。结果表明,菌株NG-33能够在不同土壤条件下,提高玉米根系的根长、表面积、从根数目和分枝数,促进玉米根系的发育。在缺磷条件下,NG-33菌株促进了玉米根系对磷元素的吸收。而在黄潮土壤中该菌株可以促进玉米根系对氮和钾元素的吸收作用。因此,在土壤中接种Enterobacter sp.NG-33菌株能促进苗期玉米根系的发育并改善植株对氮、磷和钾元素的吸收。Strain Enterobaeter sp. NG-33 was newly isolated in our laboratory, which could dissolve insoluble phosphorus effectively and produce indole-3-acetic acid （IAA）. A potted experiment was designed to analyze effect of inoculating Enterobacter sp. NG-33 on root growth and the content of nitrogen （N）, phosphorus （P） and potassium （K） in plant of seedling maize which were grown in common soil and P-deficit soil. Then, we explored the growth promoting mechanism of different soil conditions on the growth of seedling maize. The results showed that strain NG-33 could increase the root length （Len）, surface area （SA） and root volume （VoL）, and promote the development of root system. While under P-deficit condition, strain NG-33 promoted the absorption of phosphorus in maize roots. In addition, this strain in common soil could promote the absorption of nitrogen and potassium in maize roots. Therefore, the inoculation of strain Enterobaeter sp. NG-33 in soil could accelerate the development of root system and improve the absorption of N, P and K of plant.

关 键 词：玉米 解磷菌 ENTEROBACTER sp.NG-33 根系分析 氮磷钾含量 

分 类 号：S513[农业科学—作物学]