Figure 4.

Effect of exogenous calcium and EGTA on endogenous Ca²⁺ content under low-temperature stress during stem elongation. CC: no CaCl₂ sprayed and no low-temperature stress; CaC: CaCl₂ sprayed without low-temperature stress; CL: no CaCl₂ sprayed with low-temperature stress; CaL: CaCl₂ sprayed with low-temperature stress; EC: EGTA sprayed with no low-temperature stress; and EL: EGTA sprayed with low-temperature stress. Data are means ± SE of three biological replicates. Significant differences at p < 0.05 were computed, and means were separated according to Duncan’s multiple range test. The means with the same small case letters are statistically non-significant.