Figure 4.

Cellular cation contents of yeast G19 strain transformed with empty plasmid (pYES2, white circles, dotted lines) or OsKAT1 expression plasmid (black circles, solid lines) in media containing NaCl. The cells were harvested in the exponential (17 h after inoculation, left) and linear (38 h after inoculation, right) growth phases in cultures described in Figure 3, to determine the cellular contents of cations. A, K⁺ contents in the cells. B, Na⁺ contents in the cells. C, Ratios of Na⁺ to K⁺ contents in the cells. Data points shown in this figure represent means of three cultures.