Fig 3.

(A) Net photosynthetic rate, (B) respiration rate, (C) stomatal conductance, and (D) transpiration rate of cucumber seedlings under different concentrations (0, 25, 50, 100, and 200 μg kg^-1) of the herbicide bensulfuron-methyl (BSM) in soil. Values are means of four replications, with error bars showing the SD. The means of each parameter were analyzed using Duncan’s multiple range test to check whether the differences between treatments were significant. Columns marked with different lower case letters indicate a significant difference between treatments at p < 0.05.