O'Hara G W, Davey M R, Lucas J A
Can J Microbiol. 1981 Sep;27(9):871-7. doi: 10.1139/m81-138.
Seven strains of Azospirillum brasilense were compared for their effect on the growth of Zea mays grown under temperate conditions in sand--vermiculite pot cultures. Inoculation with all seven strains tested, including Fix(-) mutant strains, increased dry weight and total nitrogen content of shoots, but nitrogen concentrations were unaffected. Low and variable rates of acetylene reduction activity were observed from excised roots of inoculated plants without preincubation. Estimates of N2-fixing A. brasilense associated with inoculated roots showed differences between strains in establishing themselves in the rhizosphere and endorhizosphere. In some strains enrichment in the endorhizosphere of roots occurred following inoculation, but the relative numbers and location of the strains did not appear to affect the yield response.
对七株巴西固氮螺菌菌株进行了比较，研究它们对在温带条件下于砂 - 蛭石盆栽培养中生长的玉米生长的影响。用包括Fix(-)突变菌株在内的所有七株测试菌株接种，均增加了地上部分的干重和总氮含量，但氮浓度未受影响。对接种植物的离体根在没有预培养的情况下观察到低且变化的乙炔还原活性。对接种根相关的固氮巴西固氮螺菌的估计表明，菌株在根际和根内定殖方面存在差异。在某些菌株中，接种后根内根际出现富集，但菌株的相对数量和位置似乎并未影响产量反应。
