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首页> 外文会议>International Conference on Modelling, Monitoring and Management of Air Pollution; 200605; New forest(GB) >Foliar injury, growth, and SOD activity of Pinus densiflora exposed to ozone
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Foliar injury, growth, and SOD activity of Pinus densiflora exposed to ozone

机译：暴露于臭氧的松树叶片的叶损伤，生长和SOD活性

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This study was conducted to compare ozone sensitivity among half-sib families of Japanese red pine (Pinus densiflora S. et. Z). Ninety families were exposed in walk-in type chambers to charcoal-filtered air and 100 ppb ozone for eight hours daily over a period of five consecutive months. We surveyed the foliar injury, relative diameter at root collar (DRC) growth, and relative dry weight after fumigation. We selected five tolerant families and five sensitive families. After one year, the selected ten families were exposed to 100ppb ozone for 90 days. Every 30 days after ozone fumigation, the DRC, superoxide dismutase (SOD) activity, and malondialdehyde (MDA) content were measured. In the earlier stage of ozone fumigation, the tolerant group showed a relative DRC growth rate three times higher than that of the sensitive group. As well, during the entire fumigation period, the growth rate of the tolerant group was superior to that of the sensitive group. Relative SOD activity in the sensitive group was increased 30 days after fumigation, and in accordance with the fumigation period extended it was decreased. MDA content in the ozone treatment manifested at higher levels than in the control group, and the MDA content of the tolerant group manifested at higher levels than that found in the sensitive group. The tolerant group has more antioxidative activity than the sensitive group; therefore the tolerant group can restrain lipid peroxidation and other adverse effects on physiological activity. Ozone-induced growth reduction may thus be decreased in the tolerant group.
机译：进行这项研究是为了比较日本赤松的半同胞科之间的臭氧敏感性（Pinus densiflora S. et。Z）。在连续五个月的时间内，每天有八十个家庭在步入式隔间中暴露于木炭过滤的空气和100 ppb的臭氧中，每天暴露八个小时。我们调查了叶损伤，熏蒸后根颈（DRC）生长的相对直径以及相对干重。我们选择了五个宽容家庭和五个敏感家庭。一年后，选定的10个家庭暴露于100ppb臭氧中90天。臭氧熏蒸后每隔30天测量一次DRC，超氧化物歧化酶（SOD）活性和丙二醛（MDA）含量。在臭氧熏蒸的早期阶段，耐受组的相对DRC增长率是敏感组的三倍。同样，在整个熏蒸期间，耐受组的生长速度要好于敏感组。熏蒸30天后，敏感组的相对SOD活性增加，并且随着熏蒸时间的延长，其SOD活性降低。臭氧处理中的MDA含量高于对照组，而耐受组的MDA含量高于敏感组。耐受基团比敏感基团具有更多的抗氧化活性；因此，耐受组可以抑制脂质过氧化和其他对生理活性的不利影响。因此，在耐受组中，臭氧诱导的生长减少可能会减少。

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