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Characteristics of root length (a), surface area (b), average diameter (c), number of tips (d), volume (e), root to shoot ratio (f), activity (g) and stem cross area (h) in citrus seedlings grown under conditions of Mg deficiency (-Mg) and sufficiency (+ Mg). Data are presented as mean ± standard deviation (n = 5). Different letters represent significant differences among organs between the Mg treatment groups at P < 0.05
