FIG 6.

Overexpression of the orrA gene. Anabaena PCC 7120 having extra copies of the orrA gene on a plasmid (white bars) or the control plasmid (black bars) was grown in the presence of combined nitrogen. The transcript levels of orrA, spsA, susA, and susB (A) and sucrose contents (B) in the mid-logarithmic phase were determined without adding NaCl. Means ± standard deviations (error bars) of three independent experiments are shown. Data that represent a significant difference by applying the t test are marked with asterisks and P values.