Keller T
Swiss Federal Institute of Forestry Research, Birmensdorf, Switzerland.
Tree Physiol. 1986 Jun;1(1):85-94. doi: 10.1093/treephys/1.1.85.
Four-year-old potted Norway spruce (Picea abies (L.) Karst.) grafts established with scion material from three mature trees, were exposed to either long-term fumigation with SO(2), with and without water stress, or long-term ozone fumigation. The electrical conductivity of the needle diffusate was measured after the needles had been washed with chloroform and then leached in distilled water. Although none of the treatments caused visible symptoms of injury, SO(2) fumigation and water stress both caused an increase in diffusate conductivity, but the effects were not synergistic. Ozone fumigation lowered both conductivity and nutrient ion concentration in the leachate.
用来自三棵成熟树木的接穗材料培育的四年生盆栽挪威云杉（Picea abies (L.) Karst.）嫁接苗，分别暴露于长期的二氧化硫熏蒸（有或无水胁迫）或长期的臭氧熏蒸环境中。在用氯仿洗涤针叶并在蒸馏水中浸提后，测定针叶浸出液的电导率。尽管所有处理均未导致可见的伤害症状，但二氧化硫熏蒸和水分胁迫均导致浸出液电导率增加，不过二者的影响并非协同作用。臭氧熏蒸降低了浸出液的电导率和营养离子浓度。
