Figure 5.

Effect of endogenous-NO depletion on the phenotype and chlorophyll content of iron-sufficient maize plants. Maize plants grown hydroponically with 250 μm Fe(III)-EDTA in the nutrient solution were treated with 200 μm CPTIO, 100 μm methylene blue, or untreated (control plants). Chlorophyll content of the fourth leaf from 20-d-old plants is plotted; each bar shows a section of the leaf indicating the corresponding phenotype. Mean values and sds were calculated from two independent treatments.