Fig. 4.

NaHS enhances the content of chlorophyll in maize seedlings grown under different Fe(III)-EDTA supplies. Maize seedlings were pre-treated with 100 µM NaHS for 8 d and then grown hydroponically in a nutrient solution with 0, 25, 50, 75, 100, or 250 µM Fe(III)-EDTA for 12 d.(A) Representative photographs of the fourth leaves of plants grown at different Fe(III)-EDTA concentrations. (B) Chlorophyll content in the fourth leaves. Data are presented as means ± SE. A colour version of this figure is available at JXB online.