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

• Watanabe, Makoto

• Hoshika, Yasutomo

• Inada, Naoki

• Wang, Xiaona

• Mao, Qiaozhi

• Koike, Takayoshi

抄録

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.

収録刊行物

• Environmental Pollution

  Environmental Pollution 174 50-56, 2013-03

  Elsevier

キーワード

• Free air ozone exposure
• Photosynthesis
• Nitrogen allocation
• Beech
• Oak

詳細情報

• CRID: 1050845763942322944
• NII論文ID: 120005068880
• HANDLE: 2115/51003
• ISSN: 02697491
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles