Muller R N, Kalisz P J, Kimmerer T W
Department of Forestry, University of Kentucky, 40546-0073, Lexington, KY, USA.
Oecologia. 1987 May;72(2):211-215. doi: 10.1007/BF00379270.
The chemical constituency of flowering dogwood (Cornus florida L.) and red maple (Acer rubrum L.) foliage was analyzed over a species compositional gradient to test the hypothesis that over subtle gradients of moisture and nutrient availability production of phenolic compounds will be increased on sites of greatest stress. Calcium and nitrogen concentrations declined along the gradient in both species, while phosphorus showed a significant decline only in red maple. Lignin concentrations in both species were unrelated to the vegetation gradient, but astringent phenolics increased by 156% and 159% in dogwood and red maple, respectively. The correlation between production of polyphenolds and site quality supports previous observations that under conditions of environmental stress production of many secondary compounds is increased, and suggests that this relationship is significant over subtle environmental gradients.
在一个物种组成梯度上，对多花梾木（Cornus florida L.）和红枫（Acer rubrum L.）叶片的化学成分进行了分析，以检验以下假设：在水分和养分有效性的细微梯度上，酚类化合物的产量将在压力最大的地点增加。钙和氮的浓度在两个物种中均沿梯度下降，而磷仅在红枫中显著下降。两个物种的木质素浓度与植被梯度无关，但在梾木和红枫中，收敛性酚类物质分别增加了156%和159%。多酚产量与立地质量之间的相关性支持了先前的观察结果，即在环境压力条件下，许多次生化合物的产量会增加，并且表明这种关系在细微的环境梯度上具有显著性。
