Fig. 7.

Effects of photosynthesis under Cd stress in Verbena bonariensis leaves. Pn and Tr were expressed as umol·m^− 2·s^− 1, Gs was expressed as 10^− 1·mol·m^− 2·s^− 1, Ci as ml·L^− 1, Chla and Chlb as mg·g^− 1