A Mechanism of Photosynthetic Inhibition in Sink-Limited Young Apple Trees by Continuous Light

• Cheng Yuhou

  The United Graduate School of Agricultural Sciences, Iwate University

• Arakawa Osamu

  Faculty of Agriculture and Life Science, Hirosaki University

• Sawada Shinichi

  Faculty of Agriculture and Life Science, Hirosaki University

Bibliographic Information

Other Title

• リンゴ幼樹における連続明期処理によるシンク・リミット状態での光合成速度低下の機構
• 栽培管理・作型 リンゴ幼樹における連続明期処理によるシンク・リミット状態での光合成速度低下の機構
• サイバイ カンリ サクガタ リンゴヨウジュ ニ オケル レンゾクメイキ ショリ ニ ヨル シンク リミット ジョウタイ デ ノ コウゴウセイ ソクド テイカ ノ キコウ

Abstract

The mechanism of photosynhetic inhibition in sink-limited leaves of young apple trees by continuous light (CL) was investigated. By 3 days after CL, the photosynthetic rate (A), stomatal conductance and intercellular CO₂ concentration (Ci) had decreased by 38 %, 58 % and 9 %, respectively, while leaf starch concentration accumulated up to 2.8-fold. Therefore, CL trees were sink-limited. However, A, Ci and stomatal conductance approximately recovered after only 1 day of continuous dark (CD) following 3 days of CL, wihile leaf starch concentration was markedly reduced to the control level. Therefore, CL trees were rescued from sink-limit. After 3 days of exposure to CL, the initial slope of the A-Ci curve in CL trees was 17 % lower than that in the controls; that is to say, the carboxylation efficiency of CL trees was reduced. However, the initial slope of the A-Ci curve in CL trees was completely recovered after only 1 day of CD following 3 days of CL. In addition, both the activity and concentration of ribulose-1, 5-bisphosphate carboxylase (RuBPcase) were not significantly affected by 3 days of CL. These results suggested that CL-induced photosynthetic inhibition was due to stomatal limitation, rather than decreased activity of RuBPcase.<br>

Journal

• Horticultural Research (Japan)

  Horticultural Research (Japan) 3 (4), 393-398, 2004

  THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE

Keywords

• 気孔コンダクタンス
• 光合成速度
• リンゴ幼樹
• 細胞間隔CO₂濃度
• シンク・リミット

Details

• CRID: 1390282680186942464
• NII Article ID: 110001815878
• NII Book ID: AA11608561
• DOI: 10.2503/hrj.3.393
• COI: 1:CAS:528:DC%2BD2MXhs1Ggur0%3D
• ISSN: 18803571
• ISSN: 13472658
• NDL BIB ID: 7184383
• Web Site: https://agriknowledge.affrc.go.jp/RN/2030702820
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7184383
• Web Site: http://www.jstage.jst.go.jp/article/hrj/3/4/3_4_393/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10471212
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • NDL-Digital
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed