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Arabidopsis roots morphology in response to the increasing doses of protodioscin: (A) primary root length; (B) lateral roots number; (C) apex width; (D) root hair length, and (E) root hair density. ED50: dose causing 50% reduction of primary root length. Different letters indicate significant differences observed among treatments at p ≤ 0.05 (SNK’s test). N = 4.
