Difference in photosynthetic responses to free air ozone fumigation between upper and lower canopy leaves of Japanese oak (Quercus mongolica var. crispula) saplings

• WATANABE Makoto

  Institute of Agriculture, Tokyo University of Agriculture and Technology

• HOSHIKA Yasutomo

  Silviculture and Forest Ecological Studies, Hokkaido University Institute of Sustainable Plant Protection, National Research Council of Italy

• INADA Naoki

  Silviculture and Forest Ecological Studies, Hokkaido University

• KOIKE Takayoshi

  Silviculture and Forest Ecological Studies, Hokkaido University

書誌事項

タイトル別名

• Difference in photosynthetic responses to free air ozone fumigation between upper and lower canopy leaves of Japanese oak (<i>Quercus mongolica</i> var. <i>crispula</i>) saplings

抄録

To clarify the difference of ozone (O₃) sensitivity of photosynthesis in leaves located different canopy positions, we investigated photosynthetic responses of Japanese oak saplings to free air O₃ exposure, and compared the results with Siebold's beech saplings reported previously. The O₃ at 60 nmol mol^-1 during daytime was fumigated for two growing seasons, from 6 August to 11 November 2011 and from 17 May to 10 November 2012. In June, August and October of 2012, we determined photosynthetic activity of upper and lower canopy leaves. The exposure to O₃ increased the ratio of intercellular CO₂ concentration to ambient CO₂ concentration in October, indicating stomatal sluggishness. We observed an O₃-induced, significant decrease in light-saturated net photosynthetic rate (A_sat) with no significant interaction between O₃ effect and canopy position for A_sat. Therefore, we conclude that the O₃ sensitivity of photosynthesis in upper and lower canopy leaves was similar in Japanese oak, while our previous study reported that the upper canopy leaves of Siebold's beech have a higher O₃ sensitivity than lower canopy leaves.

収録刊行物

• 農業気象

  農業気象 71 (3), 227-231, 2015

  日本農業気象学会

キーワード

• Free air ozone exposure
• Japanese Oak
• Light condition
• Photosynthesis
• Sensitivity to ozone

詳細情報

• CRID: 1390001204668958464
• NII論文ID: 130005098169
• NII論文ID: 120005670602
• NII書誌ID: AN00200732
• DOI: 10.2480/agrmet.d-14-00012
• ISSN: 18810136
• ISSN: 00218588
• HANDLE: 2115/60223
• NDL書誌ID: 026735857
• Web Site: http://id.ndl.go.jp/bib/026735857
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026735857
• Web Site: https://www.jstage.jst.go.jp/article/agrmet/71/3/71_D-14-00012/_pdf
• 本文言語コード: en
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