Figure 10.

Effects of FA on the relative membrane injury of cucumber plants treated with different nitrogen sources. The membrane injury of the leaves was measured at 7 h after FA treatment when wilt symptoms occurred in 1 mM NO₃⁻-fed plants. 1AH, 5AH (mock-treated 1 mM or 5 mM NH₄⁺-fed plants, respectively); 1NH, 5NH (mock-treated 1 mM or 5 mM NO₃⁻-fed plants, respectively); 1AF, 5AF (60 ppm FA-treated 1 mM or 5 mM NH₄⁺-fed plants, respectively); 1NF, 5NF (60 ppm FA-treated 1 mM or 5 mM NO₃⁻-fed plants, respectively). The data are the means ± SD of four replicates. Significant differences (LSD test, p < 0.05) among treatments are indicated by different letters.