Leaf chlorosis phenotypes of the <i>3xbhlh</i> mutant.

<p>A, 10-old WT and <i>3xbhlh</i> plants grown at +Fe and −Fe; bar = 5 mm; B, Strength of leaf chlorosis; the leaf chlorosis scale used was 1 = green, 2 = green, partially yellow, 3 = yellow-green, 4 = yellow; 5 = white-yellow; n = 12; C, Fe content per leaf dry mass; n = 4; indicates a significant change (p<0.05) of −Fe versus +Fe; + indicates a significant change (p<0.05) of <i>3xbhlh</i> versus WT.