J Integr Plant Biol. ›› 2013, Vol. 55 ›› Issue (3): 202-208.DOI: 10.1111/jipb.12032

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H2O2-induced Leaf Cell Death and the Crosstalk of Reactive Nitric/Oxygen Species

Yiqin Wang1, Aihong Lin1,2, Gary J. Loake3 and Chengcai Chu1*   

  1. 1State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing), Institute of Genetics and Developmental Biology, the Chinese Academy of Sciences, Beijing 100101, China
    2National Agricultural Technology Park, Xinyu 338000, China
    3Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh, King's Buildings, Edinburgh EH9 3JR, United Kingdom
  • Received:2012-11-21 Accepted:2012-12-30 Published:2013-03-05
  • About author:*Corresponding author Tel/Fax: +86 10 6480 6608; E-mail: ccchu@genetics.ac.cn

Abstract:

In plants, the chloroplast is the main reactive oxygen species (ROS) producing site under high light stress. Catalase (CAT), which decomposes hydrogen peroxide (H2O2), is one of the controlling enzymes that maintains leaf redox homeostasis. The catalase mutants with reduced leaf catalase activity from different plant species exhibit an H2O2-induced leaf cell death phenotype. This phenotype was differently affected by light intensity or photoperiod, which may be caused by plant species, leaf redox status or growth conditions. In the rice CAT mutant nitric oxide excess 1 (noe1), higher H2O2 levels induced the generation of nitric oxide (NO) and higher S-nitrosothiol (SNO) levels, suggesting that NO acts as an important endogenous mediator in H2O2-induced leaf cell death. As a free radical, NO could also react with other intracellular and extracellular targets and form a series of related molecules, collectively called reactive nitrogen species (RNS). Recent studies have revealed that both RNS and ROS are important partners in plant leaf cell death. Here, we summarize the recent progress on H2O2-induced leaf cell death and the crosstalk of RNS and ROS signals in the plant hypersensitive response (HR), leaf senescence, and other forms of leaf cell death triggered by diverse environmental conditions.

Wang Y, Lin A, Loake GJ, Chu C (2013) H2O2-induced leaf cell death and the crosstalk of reactive nitric/oxygen species. J. Integr. Plant Biol. 55(3), 202–208.

Key words: H2O2 induced leaf cell death, hypersensitive response, leaf senescence, nitric oxide, reactive nitrogen species, reactive oxygen species

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