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苗龄为 87d的油松 (PinustabulaeformisCarr )于 2 0 0 2 0 7 0 1～ 0 8 2 9在 3个处理组进行SO2 暴露实验 6 0昼夜 ,处理 1和处理 2在 2 4h中SO2 浓度分别为 0 1mg·m-3 和 0 2mg·m-3 ,处理 3每日 6hSO2 浓度为 0 5mg·m-3 ,18hSO2 浓度为 0 1mg·m-3 .经SO2 暴露后 ,处理 1油松针叶气孔保卫细胞、针叶颜色未见异常 ;叶绿素含量、类胡萝卜素含量、光合速率、蒸腾速率、单株干重、相对生长速率与对照组无显著差异 ;但针叶含硫量比对照增加 17% ,从针叶渗出的钾离子量比对照增加 2 2 % .处理 2油松气孔保卫细胞、针叶颜色未见异常 ;叶绿素含量、光合速率、蒸腾速率与对照组无显著差异 ;类胡萝卜素含量下降5 % ,针叶含硫量增加 92 % ,从针叶渗出的钾离子量比对照增加 6 7% ,单株干重下降 4 5 % ,相对生长速率下降 0 6mg·(g·d) -1.处理 3油松气孔保卫细胞、针叶颜色发现异常 ;叶绿素含量与对照组相似 ,但类胡萝卜素含量下降 2 1% ,含硫量增加 10 4 % ,从针叶渗出的钾离子量比对照增加 89% ,光合速率下降 5 % ,蒸腾速率增加 8% ,单株干重下降 7 6 % ,相对生长速率下降 1 3mg·(g·d) -1.
The Pinus tabulaeformis carrillae (87 days old) was exposed to SO2 for 2 days at 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1mg · m-3 and 0 2mg · m-3, respectively, the treatment 6 daily 6hSO2 concentration 0 5mg · m-3, 18hSO2 concentration of 0 1mg · m-3. After SO2 exposure, treatment 1 Pinus tabulaeformis stomatal defend There was no significant difference in the color of the cells and the needles. The chlorophyll content, carotenoid content, photosynthetic rate, transpiration rate, dry weight per plant and relative growth rate had no significant difference with the control group. However, the sulfur content in the needles increased by 17% The amount of potassium ions exuding from the needles was increased by 22% compared with that of the control, and no significant differences were observed in the color of coniferous leaves when treated with Pinus tabulaeformis seedlings. The chlorophyll content, photosynthetic rate and transpiration rate were not significantly different from those of the control group. The content of carotenoids The amount of potassium exudation from needles increased by 67% and the dry weight per plant decreased by 45% and the relative growth rate decreased by 6mg · g · d -1, -1. Treatment 3 Pinus tabulaeformis cells, needle color was found abnormal; chlorophyll content and the control group However, the content of carotenoid decreased 21%, the content of sulfur increased 10 4%, the amount of potassium ion exuded from needle increased 89%, the photosynthetic rate decreased 5% and the transpiration rate increased 8% Decreased by 76%, and the relative growth rate decreased by 13 mg · (g · d) -1.