Fig. 2.

Effect of NaHS on phenotype (A), chlorophyll content (B), and biomass (C) of iron-deficient maize plants. Maize seedlings were pre-treated with 100 µM NaHS for 8 d and then grown in a nutrient solution containing 1 µM Fe(III)-EDTA or 50 µM Fe(III)-EDTA for 12 d. Data are presented as means ± SE. Columns labelled with different letters indicate significant differences at P<0.05. –Fe, 1 µM Fe; –Fe+NaHS, seedlings were pre-treated with 100 µM NaHS and then treated with 1 µM Fe; +Fe, 50 µM Fe; +Fe+NaHS, seedlings were pre-treated with 100 µM NaHS and then treated with 50 µM Fe. A colour version of this figure is available at JXB online.