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Morphology of wild type and xi1 xi2 xik gravisensitive region. (A) Cross-sections of inflorescence stems. (B) Longitudinal sections of inflorescence stems. Toluidine blue staining. Ep, epidermis; Co, cortex; En, endodermis; Ph, phloem; Xy, xylem; If, interfascicular fiber. Scale bars 50 μm.
