Involvement of the Chloroplast Signal Recognition Particle cpSRP43 in Acclimation to Photooxidative Stress Condition in <I>Arabidopsis</I>

• Klenell Markus

  Department of Botany, Stockholm University, Sweden

• Morita Shigeto

  Department of Botany, Stockholm University, Sweden Graduate School of Agriculture, Kyoto Prefectural University

• Tiemblo-Olmo Mercedes

  Department of Botany, Stockholm University, Sweden

• Muhlenbock Per

  Department of Botany, Stockholm University, Sweden

• Karpinski Stanislaw

  Department of Botany, Stockholm University, Sweden Department of Plant Physiology, Umea University and Umea Plant Science Centre, Sweden

• Karpinska Barbara

  Department of Botany, Stockholm University, Sweden

Bibliographic Information

Other Title

• シロイヌナズナ葉緑体シグナル認識粒子cpSRP43は光酸化ストレス馴化に関与する

Abstract

In this study we investigated the role of the CAO gene coding for the chloroplast recognition particle cpSRP43 in the acclimation to photooxidative stress. The Arabidopsis mutant chaos that lacks cpSRP43 is known to have reduced PSII antennae proteins. We revealed that the mutant has lower growth rates but significantly higher tolerance to photooxidative stress under both tightly controlled laboratory conditions and highly variable conditions in the field. This greater tolerance of the mutant was associated with a lower production of H₂O₂, lower ascorbate levels and less induction of ascorbate peroxidases. Expression of the CAO gene may be regulated by a light-dependent chloroplastic redox-signalling pathway, and was suppressed during acclimation to high light and chilling temperatures. It is concluded that presence/absence of the CAO gene has an impact on photooxidative stress tolerance, and the regulation of CAO gene may be part of the plants system for acclimation to high light.

Journal

• Plant and Cell Physiology Supplement

  Plant and Cell Physiology Supplement 2005 (0), 584-584, 2005

  The Japanese Society of Plant Physiologists

Details

• CRID: 1390282680605222400
• NII Article ID: 130006988871
• DOI: 10.14841/jspp.2005.0.584.0
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed