Characterization ofR. fredii QB1130, a strain effective on commercial soybean cultivars |
| |
Authors: | J Lin K B Walsh D A Johnson D T Canvin Wang Shujin D B Layzell |
| |
Institution: | (1) Department of Biology, Queen's University, K7L 3N6 Kingston, Ontario, Canada;(2) Department of Biology, Ottawa University, K1N 6N5 Ottawa, Ontario, Canada;(3) Institute of Forestry and Soil Science, Academic Sinica, Shenyang, Liaoning, China |
| |
Abstract: | Summary Two rhizobial strains (QB1130 and C3A) from northeast China were identified asRhizobium fredii on the basis of growth rate, media acidification and growth on a wide range of carbon substrates. The strains were shown
to be distinct from USDA 191 on the basis of plasmid number and size. Bothnif and commonnod genes were located on the 295 kb plasmid of strains QB1130 and USDA 191, while onlynif genes were identified on this plasmid in C3A. When used to inoculate four commercial soybean (Glycine max) cultivars, one of the strains (C3A) was found to be ineffective, while the other (QB1130) was at least as effective as USDA
191, a strain ofR. fredii reported to be widely effective on North American cultivars of soybean. Further, QB1130 was capable of more effective nodulation
of cowpea or the uncultivated soybean line, Peking, than either USDA 191 or the slow-growingBradyrhizobium japonicum USDA 16. Strain QB1130 should be useful for studies directed at improving symbiotic performance in soybean, or for studies
of the comparative physiology and genetics of FG and SG strains on a single host. |
| |
Keywords: | Bradyrhizobium japonicum C3A fast-growing rhizobia Glycine max Rhizobium fredii B1130 USDA191 |
本文献已被 SpringerLink 等数据库收录! |
|