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Photosynthetic traits of Siebold's beech and oak saplings grown under free air ozone exposure in northern Japan

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Title: Photosynthetic traits of Siebold's beech and oak saplings grown under free air ozone exposure in northern Japan
Authors: Watanabe, Makoto Browse this author →KAKEN DB
Hoshika, Yasutomo Browse this author →KAKEN DB
Inada, Naoki Browse this author
Wang, Xiaona Browse this author
Mao, Qiaozhi Browse this author
Koike, Takayoshi Browse this author →KAKEN DB
Keywords: Free air ozone exposure
Nitrogen allocation
Issue Date: Mar-2013
Publisher: Elsevier
Journal Title: Environmental Pollution
Volume: 174
Start Page: 50
End Page: 56
Publisher DOI: 10.1016/j.envpol.2012.11.006
PMID: 23246746
Abstract: We set up a free-air ozone (O3) exposure system for determining the photosynthetic responses of Siebold’s beech (Fagus crenata) and oak (Quercus mongolica var. crispula) to O3 under field conditions. Ten-year-old saplings of beech and oak were exposed to an elevated O3 concentration (60 nmol mol-1) during daytime from 6 August to 11 November 2011. Ozone significantly reduced the net photosynthetic rate in leaves of both species in October, by 46% for beech and 15% for oak. In beech there were significant decreases in maximum rate of carboxylation, maximum rate of electron transport in photosynthesis, nitrogen content and photosynthetic nitrogen use efficiency, but not in oak. Stomatal limitation of photosynthesis was unaffected by O3. We therefore concluded photosynthesis in beech is more sensitive to O3 than that in oak, and the O3-induced reduction of photosynthetic activity in beech was due not to stomatal closure, but to biochemical limitation.
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 渡辺 誠

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