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(A) Morphology of wheat roots. (B–C) Microstructure of YM13 root cross section under control condition and drought stress. (D–E) Microstructure of YN19 root cross section under control condition and drought stress. CC, control condition; Co, cortex; DS, drought stress; Ph, phloem; VC, vascular cylinder; XV, xylem vessel. Scale bars: (A) 8 cm, (B–E) 50 µm.
