J Integr Plant Biol. ›› 2018, Vol. 60 ›› Issue (9): 805-826.DOI: 10.1111/jipb.12654

Special Issue: Abiotic Stresses Special Issue on Cell Signaling

• Invited Expert Reviews • Previous Articles     Next Articles

Reactive oxygen species signaling and stomatal movement in plant responses to drought stress and pathogen attack

Junsheng Qi1, Chun-Peng Song2, Baoshan Wang3, Jianmin Zhou4, Jaakko Kangasjärvi5, Jian-Kang Zhu6,7 and Zhizhong Gong1*   

  1. 1State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China
    2Collaborative Innovation Center of Crop Stress Biology, Henan Province, Institute of Plant Stress Biology, Henan University, Kaifeng 475001, China
    3Key Lab of Plant Stress Research, College of Life Science, Shandong Normal University, Ji'nan, China
    4State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
    5Division of Plant Biology, Viikki Plant Science Centre, Department of Biosciences, University of Helsinki, 00014 Helsinki, Finland
    6Shanghai Center for Plant Stress Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China
    7Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN 47907, USA
  • Received:2018-02-20 Accepted:2018-04-08 Online:2018-04-16 Published:2018-09-01
  • About author:*Correspondence: Email: Zhizhong Gong (gongzz@cau.edu.cn)

Abstract:

Stomata, the pores formed by a pair of guard cells, are the main gateways for water transpiration and photosynthetic CO2 exchange, as well as pathogen invasion in land plants. Guard cell movement is regulated by a combination of environmental factors including water status, light, CO2 levels and pathogen attack, as well as endogenous signals such as abscisic acid and apoplastic reactive oxygen species (ROS). Under abiotic and biotic stress conditions, extracellular ROS are mainly produced by plasma membrane‐localized NADPH oxidases, whereas intracellular ROS are produced in multiple organelles. These ROS form a sophisticated cellular signaling network, with the accumulation of apoplastic ROS an early hallmark of stomatal movement. Here, we review recent progress in understanding the molecular mechanisms of the ROS signaling network, primarily during drought stress and pathogen attack. We summarize the roles of apoplastic ROS in regulating stomatal movement, ABA and CO2 signaling, and immunity responses. Finally, we discuss ROS accumulation and communication between organelles and cells. This information provides a conceptual framework for understanding how ROS signaling is integrated with various signaling pathways during plant responses to abiotic and biotic stress stimuli.

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