Matyssek R, Günthardt-Goerg M S, Landolt W, Keller T
Swiss Federal Institute for Forest, Snow, and Landscape Research, Zürcherstr. 111, CH-8903 Birmensdorf ZH, Switzerland.
Environ Pollut. 1993;81(3):207-12. doi: 10.1016/0269-7491(93)90203-z.
Seasonal growth was studied in potted cuttings of hybrid poplar (one clone of Populus x euramericana) either exposed to ozone in filtered air (0 = control, 0.05, 0.10 microl litre(-1)) or in ambient air (mean = 0.03 microl litre(-1)). Only at 0.10 microl litre(-1) was biomass production reduced and related to leaf loss rather than leaf formation, since the latter was similar in all treatments. Stem length at 0.10 microl litre(-1) approached that of the control, whereas starch concentration in the green stem bark tended to be reduced, as were the ratios of stem weight/length and root/shoot biomass. The changes in carbon allocation and biomass production gradually became established during the second half of the growing season. At the altered carbon allocation at 0.10 microl litre(-1), the ratio of whole-plant production/attached foliage area resembled that of the other O(3) regimes. However, the latter ratio was strongly reduced at 0.10 microl litre(-1) when calculated on the basis of the potential foliage area, as compensated for the O(3)-induced leaf loss. Thus the carbon return/cost balance of the totally formed foliage was low, although the relative-growth rate of ozonated plants temporarily reached that of the control. The relation between leaf differentiation under ozonation (lowered stomatal density) and whole-plant production remains uncertain. The plant behavior found is discussed in terms of passive response or acclimatization to O(3) stress.
对杂交杨树（欧美杨的一个无性系）盆栽插条的季节性生长进行了研究，这些插条分别暴露于过滤空气中的臭氧（0 = 对照，0.05、0.10微升/升）或环境空气中（平均值 = 0.03微升/升）。仅在0.10微升/升时生物量生产才减少，且与叶片损失有关而非叶片形成，因为在所有处理中叶片形成情况相似。0.10微升/升时的茎长接近对照，而绿色茎皮中的淀粉浓度趋于降低，茎重/长度以及根/茎生物量的比率也降低。碳分配和生物量生产的变化在生长季的后半期逐渐显现。在0.10微升/升时碳分配改变的情况下，全株产量/附着叶面积的比率与其他臭氧处理方式相似。然而，当基于潜在叶面积计算时，该比率在0.10微升/升时大幅降低，以补偿臭氧诱导的叶片损失。因此，尽管臭氧处理植株的相对生长速率暂时达到对照水平，但完全形成的叶片的碳回报/成本平衡较低。臭氧处理下叶片分化（气孔密度降低）与全株产量之间的关系仍不确定。根据对臭氧胁迫的被动响应或适应性来讨论所发现的植物行为。
