Fig. 3

Effects of eCO2 concentration and B. impatiens infestation on photosynthetic pigments in Chinese chives. (A) Chlorophyll a; (B) Chlorophyll b; (C) Total chlorophyll; (D) Carotenoid. Asterisks of *, ** and ns respectively represent P < 0.05, P < 0.01, and P > 0.05 between two CO2 concentration. Lowercase letters of a, b and c denote significant differences (P < 0.05) among three infestation densities at 400 µL/L. Capital letters of A, B and C indicate significant differences (P < 0.05) among three infestation densities at 800 µL/L.