Reproductive capacity and carbon-isotope ratios in seed of wild type (WT) and two CAM-deficient lines of common ice plant treated with 0.3 m NaCl over a 4-month growth period. A, Number of seeds per plant. Each data point is the mean of 69 (351), 92 (371), or 131 (WT) plants ± se. Student's t test P value between WT and 351: P = 2.2 × 10−16** and between WT and 371: P = 2.2 × 10−16**. B, Individual seed weight. Each data point is the mean of 69 (351), 92 (371), or 131 (WT) individual plants ± se. Student's t test P value between WT and 351: P = 1.8 × 10−11** and between WT and 371: P = 1.2 × 10−4*. C, Carbon-isotope ratios of seeds. Each data point is the mean of 10 replicates ± se. Student's t test P value between WT and 351: P = 9.8 × 10−13** and between WT and 371: P = 1.2 × 10−3*.