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Schematic drawing describing the generalized distribution patterns of IAA, carbohydrates, and Suc-metabolizing enzyme activities across the cambial meristem and its differentiating and mature derivatives at earlywood and latewood formation. FP, Functional phloem; CZ, cambial zone; ET, expanding tracheids; EW(l), maturing (living) earlywood tracheids; EW(d), mature (dead) earlywood tracheids; LW(l), maturing (living) latewood tracheids.
