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Concentrations of (A) intracellular phenolics, (B) epicuticular flavonoid aglycones, (C) epicuticular triterpenoids, (D) condensed tannins, and (E) lignin (mean + SE, n = 5–6) in the senescent leaves and decomposed litter of 19 Betula pendula genotypes (arranged in a decreasing order of senescent leaf tannin concentrations).
