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Insertion site and wounding effect
(A) OECT inserted in the hybrid aspen tree stem, showing the active area of the device in the xylem tissue (blue arrow indicates the mature xylem), scale bar 1 mm.
(B) Optical microscopy images of stem cross-sections displaying the OECT wounding effect. Control and hybrid aspen tree response after 1, 2, and 5 days of insertion. Scale bar 200 µm.
