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The ferric chelate reductase (FCR) activities visualized in roots (a), and the relationship between lateral roots development and SPAD values (b). (a) The tomato plants were grown for 6 d in nutrient solution that contained (+Fe) or omitted (−Fe) Fe-EDTA. (b) The correlation relationship was calculated from the results obtained by the study of Dasagan et al. (2002), in which the four tomato plants were grown in the nutrient solution with the Fe concentration at 10−6 M FeEDDHA. **P<0.05
