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Comparison of wound-induced accumulation of PAL, OMT, and WIN3.7 mRNAs in hybrid poplar clones 245 and 388. Total RNA was extracted from the combined second and fourth fully expanded leaves of 6- to 8-week-old cuttings that had been wounded as described in the text. Total RNA was extracted, subjected to RNA-blot hybridization analysis, and the amount of hybridizing radioactivity was quantitated using a phosphor imager. Time points represent the hours after the initial wounding event.
