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. 1984 Oct;10(10):1469-76.
doi: 10.1007/BF00990316.

Variability in accumulation of proanthocyanidins (condensed tannins) in needles of Douglas-fir (Pseudotsuga menziesii) following long-term budworm defoliation

T Walters  1 , H A Stafford
Affiliations

Variability in accumulation of proanthocyanidins (condensed tannins) in needles of Douglas-fir (Pseudotsuga menziesii) following long-term budworm defoliation

T Walters et al. J Chem Ecol. 1984 Oct.

Abstract

Long-term defoliation by budworms was associated with higher levels of soluble proanthocyanidins in the current year needles of Douglas-fir trees. The proanthocyanidin contents of needles from defoliated Douglas-fir trees were considerably more variable than those levels of undefoliated ones. The increased mean and variability of proanthocyanidin levels following defoliation may have interesting ecological consequences for Douglas-fir and its defoliators.

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