Changes in sucrose metabolism in maize varieties with different cadmium sensitivities under cadmium stress
Fig 2
Effects of different Cd concentrations on the (A) photosynthetic rate, chlorophyll (B) a and (C) b contents of the two maize varieties. Data are presented as the treatment means ± SD (n = 4). Different letters indicate a significant difference when P < 0.05 (Duncan’s test). F-test: Photosynthetic rate: F(Cultivars) = 55.54**; F(Cd) = 102.15**; F(Cultivars × Cd) = 0.41. Chlorophyll a: F(Cultivars) = 17.11**; F(Cd) = 80.63**; F(Cultivars × Cd) = 2.36. Chlorophyll b: F(Cultivars) = 39.60**; F(Cd) = 181.13**; F(Cultivars × Cd) = 2.63. *P < 0.05; **P < 0.01.