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中文摘要：
在臭氧浓度升高条件下,采用开顶箱（OTC）方法研究了臭氧浓度升高对沈阳市主要绿化树种银杏光合生理特性的影响。结果表明,与对照相比,高浓度（80±8nmol.mol^-1）臭氧处理下,银杏叶片净光合速率显著降低。处理50d时,降低幅度为33.90%（P〈0.01）,类胡萝卜素含量显著增加（P〈0.05）;叶绿素a、叶绿素b与叶绿素（a＋b）含量变化复杂,叶绿素a/b值则先降低后升高;可溶性糖含量无明显变化,而淀粉含量则随着处理时间的延长显著降低;可溶性蛋白含量低于对照,并随着处理时间延长下降幅度增大;叶片中丙二醛含量随着处理时间显著增加。处理80d时,丙二醛含量增加了79.53%。光合作用的下降与叶绿素的变化无关,主要与膜脂过氧化有关。光合作用的下降导致了可溶性蛋白质和淀粉的减少,并最终导致生长缓慢。
英文摘要：
With open-top chamber, this paper studied the photosynthetic characteristics of Ginkgo biloba, a main greening tree species in Shenyang, under elevated ozone concentration. The results showed that after 50 days exposure to 80 ± 8 nmol·mol^-1 elevated ozone, the net photosynthestic rate of G. biloba leaf decreased significantly, with a decrement of 33.90%. The leaf carotenoid content increased notably, while chlorophyll content changed a little, with the ratio of chlorophyll a to chlorophyll b declined first and ascended then. No significant change was observed in leaf soluble sugar, while soluble protein and starch contents decreased obviously with time. The leaf malondialehyde （MDA） content was increased with time, and the increment was 79.53% on the 80th day of exposure. The decline of G. biloba photosynthesis had no correlation with the changes of chlorophyll content, but correlated markedly with membrane lipid peroxidation. The decline of the photosynthesis caused the decrease of leaf soluble protein and starch contents, resulting in a slow growth of the tree.
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同项目期刊论文
Effects of Elevated Ozone on Photosynthetic CO2 Exchange
and Chlorophyll a Fluorescence in Leaves of
Influence of elevated carbon dioxide and ozone on the foliar nonvolatile terpenoids in Ginkgo biloba
Solar activity, Global Surface Air Temperature Anomaly and Pacific Decadal Oscillation signals obser
Impact of Elevated CO2 and O3 Concentrations on Biogenic
Volatile Organic Compounds Emissions from G
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