FIG 6.

Deficiency of the gor19 strain in symbiosis with alfalfa. (A) Symbiotic phenotypes of the WT, gor19, and cpgor19 strains. (B) Dry weights of shoots inoculated with the WT, gor19, and cpgor19 strains. (C) Nitrogenase activity of alfalfa nodules per plant, as detected by C₂H₂ reduction, in plants inoculated with the WT, gor19, and cpgor19 strains. (D) Numbers of nodules per plant, assessed 5, 9, and 14 dpi. In panels B to D, the data represent means ± standard deviations (n = 32). The experiments were repeated four times, and a representative experiment is shown. Significant differences (P < 0.05) were identified by one-way ANOVA, followed by Tukey's post hoc test, and are noted as different letters (P < 0.05).