Molecular ecological analyses of nitrogen-fixing bacterial consortia in rice rhizospere and plant

分析了水稻根际固氮菌Klebsiella oxytoca R16的固氮活性与根际植物群细菌互作的关系。菌株R16与9株从水稻土中分离的非固氮菌共培养。假单胞菌RKF 06显著提高了R16的固氮活性。在水稻根际接种试验中，R16与菌株RKF 06同时接种时表现出较高的固氮活性。这一发现将为利用固氮菌提供新的途径。

Relationship between nitrogen-fixing activity of Klebsiella oxytoca R16, a diazotroph living in rice rhizosphere, and its bacterial interaction in rhizosphere flora was analyzed. Strain R16 was cultivated together with 9 strains of non-diazotroph isolated form paddy soil. Pseudomonas sp. RKF06 enhanced the nitrogen-fixing activity of R16 significantly. In inoculation assay of R16 into the rhizosphere of rice, R16 showed higher nitrogen-fixing activity when strain RKF06 was inoculated simultaneously. This finding will be a new manner to take advantage of diazotrophs.