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2011 | 33 | 1 |
Tytuł artykułu

Effects of elevated carbon dioxide and/or ozone on endogenous plant hormones in the leaves of Ginkgo biloba

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Języki publikacji
Four-year-old Gingko (Ginkgo biloba L.) trees were exposed to ambient and elevated concentrations of CO₂ and O₃, and their combination for 1 year, using opentop chambers in Shenyang, China in 2006. Growth parameters and endogenous plant hormones were measured simultaneously over the experiment period. Elevated CO₂ increased leaf area and leaf dry weight but had no effect on shoot length, increased indole-3-acetic acid (IAA), gibberellins A₃ (GA₃), zeatin riboside (ZR), dihydrozeatin (DHZR) and isopentenyl-adenosine (iPA) content but decreased abscisic acid (ABA) content. Elevated O₃ significantly decreased leaf area, leaf dry weight, shoot length, and decreased IAA, GA₃, ZR content but increased ABA content and had a little effect on iPA, DHZR content. Elevated CO₂ + O₃ decreased IAA, iPA and DHZR content while increased ABA and GA₃ content in the early stage of the exposure and then decreased in the late stage. The evidence from this study indicates that elevated CO₂ ameliorated the effects of elevated ozone on tree growth, and elevated CO₂ may have a largely positive impact on forest tree growth while elevated O₃ will likely have a negative impact.
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  • College of Chemical and Life Science, Shenyang Normal University, Shenyang 110034, People’s Republic of China
  • Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
  • School of Environmental Science, Liaoning University, Shenyang 110036, People’s Republic of China
  • College of Chemical and Life Science, Shenyang Normal University, Shenyang 110034, People’s Republic of China
  • College of Chemical and Life Science, Shenyang Normal University, Shenyang 110034, People’s Republic of China
  • College of Chemical and Life Science, Shenyang Normal University, Shenyang 110034, People’s Republic of China
  • College of Chemical and Life Science, Shenyang Normal University, Shenyang 110034, People’s Republic of China
  • Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, People’s Republic of China
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