Premium
Reactive oxygen species signaling and stomatal movement in plant responses to drought stress and pathogen attack
Author(s) -
Qi Junsheng,
Song ChunPeng,
Wang Baoshan,
Zhou Jianmin,
Kangasjärvi Jaakko,
Zhu JianKang,
Gong Zhizhong
Publication year - 2018
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/jipb.12654
Subject(s) - guard cell , reactive oxygen species , microbiology and biotechnology , apoplast , biology , abscisic acid , abiotic component , biotic stress , signal transduction , plant immunity , abiotic stress , botany , arabidopsis , biochemistry , ecology , cell wall , mutant , gene
Stomata, the pores formed by a pair of guard cells, are the main gateways for water transpiration and photosynthetic CO 2 exchange, as well as pathogen invasion in land plants. Guard cell movement is regulated by a combination of environmental factors, including water status, light, CO 2 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 CO 2 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.