Clonal variation in foliar chemistry of quaking aspen (Populus tremuloides Michx.)
Biochemical Systematics and Ecology
We surveyed foliar morphological and chemical variation in 31 clones of Populus tremuloides in northern lower Michigan. Significant variation among clones was exhibited for leaf weight, specific leaf area, nitrogen, starch, phenolic glycosides (salicortin and tremulacin) and condensed tannins. Variation among clones with respect to nitrogen, starch, salicortin, tremulacin and condensed tannin concentrations was 1.7-, 8.0-, 10.3-, 5.9-, and 2.1-fold, respectively. Interactions between aspen and phytophagous insects in this region are likely to be influenced by substantial interclonal variation in secondary chemistry.
Lindroth, R.L. and Hwang, Shaw Yhi, "Clonal variation in foliar chemistry of quaking aspen (Populus tremuloides Michx.)" (1996). Aspen Bibliography. Paper 1714.