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Effect of N‐trans‐cinnamoyltyramine (NTCT) on the shoot and root growth of palmer amaranth (Amaranthus palmeri) (A) timothy (Phleum pratense) (B) at concentrations of 0.024, 0.24, 2.4, 4.8, 9.6 and 24 μM. Dose–response curves based on analysis using the “drc” package in R.
