Mixture of endophytic Agrobacterium and Sinorhizobium meliloti strains could induce nonspecific nodulation on some woody legumes.
Agrobacterium sp. II CCBAU 21244 isolated from root nodules of Wisteria sinensis was verified as an endophytic bacterium by inoculation and reisolation tests. However, inoculation with a mixture of this strain and a Sinorhizobium meliloti strain could induce root nodules on W. sinensis and two other woody legumes, which do not form a symbiosis with S. meliloti alone. Rod-shaped and irregular nodules were found on the inoculated plants, in which the S. meliloti strain was detected in all of the nodules; while the Agrobacterium strain was inside of the rod-shaped nodules, or occupied only the nodule surface of the irregular globe-shaped nodules. These findings revealed novel interactions among the symbiotic bacteria, endophytic bacteria and the legume plants, although the mechanisms are still unknown.
Liu
Jie
J
Department of Bioengineering and Biotechnology, Qingdao University of Science and Technology, 266042 Qingdao, China. jliu206@sohu.com
Wang
En Tao
ET
Ren
Da Wei
da W
Chen
Wen Xin
WX
D001426:Bacterial Proteins / Q000235:genetics / Q000502:physiology; D007887:Fabaceae / Q000382:microbiology*; D055170:Plant Root Nodulation / Q000235:genetics / Q000502:physiology*; D016133:Polymerase Chain Reaction; D012231:Rhizobium / Q000235:genetics / Q000254:growth & development*; D016962:Sinorhizobium meliloti / Q000235:genetics / Q000254:growth & development*; D013559:Symbiosis / Q000235:genetics / Q000502:physiology
D001426:Bacterial Proteins