School of Forestry, Auburn University, 36849-5418, Auburn, Alabama.
J Chem Ecol. 1991 Mar;17(3):505-13. doi: 10.1007/BF00982121.
Tannin and total phenolic levels in the foliage of loblolly pine (Pinus taeda L.) were examined in order to evaluate the effect of atmospheric pollution on secondary plant metabolism. The trees were exposed to four ozone concentrations and three levels of simulated acid rain. Tannin concentration (quantity per gram) and content (quantity per fascicle) were increased in foliage exposed to high concentrations of ozone in both ozone-sensitive and ozone-tolerant families. No effect of acid rain on tannins was observed. Neither total phenolic concentration nor content was significantly affected by any treatment, indicating that the ozone-related increase in foliar tannins was due to changes in allocation within the phenolic group rather than to increases in total phenolics. The change in allocation of resources in the production of secondary metabolites may have implications in herbivore defense, as well as for the overall energy balance of the plant.
为了评估大气污染对植物次生代谢的影响，我们检测了火炬松（Pinus taeda L.）叶片中的单宁和总酚含量。这些树木分别暴露在四种臭氧浓度和三种模拟酸雨水平下。在臭氧敏感和臭氧耐受两个家族中，高浓度臭氧暴露的叶片中的单宁浓度（每克的量）和含量（每束的量）均增加。酸雨对单宁没有影响。总酚浓度和含量均未受到任何处理的显著影响，这表明与臭氧相关的叶片单宁增加是由于酚类物质组内的分配变化所致，而不是总酚的增加。次生代谢产物生产中资源分配的变化可能对食草动物防御以及植物的整体能量平衡产生影响。
