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SYTOX orange staining of trn mutant shows non-viable cells in the epidermis. (A) 5 day-old wild type root stained with SYTOX orange. Only cells at the end of the lateral root cap are dying. (B) 7 day-old trn root. Random cells in the epidermis are stained, showing their non-viability. All images are overlay projections of CLSM images. The end of the lateral root cap is marked with an asterisk. Scalebars: 100 μm.
