A Sophisticated Network of Signaling Pathways Regulates Stomatal Defenses to Bacterial Pathogens

作     者：Dominique Arnaud Ildoo Hwang 

作者机构：Department of Life Sciences POSTECH Biotech Center Pohang University of Science and Technology Pohang /90-/84 Korea 

出 版 物：《Molecular Plant》 (分子植物（英文版）)

年 卷 期：2015年第8卷第4期

页      面：566-581页

核心收录：

学科分类：0710[理学-生物学] 09[农学] 0903[农学-农业资源与环境] 0904[农学-植物保护] 090401[农学-植物病理学] 090302[农学-植物营养学] 0901[农学-作物学] 0902[农学-园艺学] 

基　　金：supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) supported by funding from the European Union's Seventh Framework Programme for research, technological development and demonstration 

主　　题：stomata immunity hydrogen peroxide nitric oxide calcium hormones 

摘      要：Guard cells are specialized cells forming stomatal pores at the leaf surface for gas exchanges between the plant and the atmosphere. Stomata have been shown to playan important role in plant defense as a part of the innate immune response. Plants actively close their stomata upon contact with microbes, thereby preventing pathogen entry into the leaves and the subsequent colonization of host tissues. In this review, we present current knowledge of molecular mechanisms and signaling pathways implicated in stomatal defenses, with particular emphasis on plant-bacteria interactions. Stomatal defense responses begin from the perception of pathogen-associated molecular patterns （PAMPs） and activate a signaling cascade involving the production of secondary messengers such as reactive oxygen species, nitric oxide, and calcium for the regulation of plasma membrane ion channels. The analyses on downstream molecular mechanisms implicated in PAMP-triggered stomatal closure have revealed extensive interplays among the components regulating hormonal signaling pathways. We also discuss the strategies deployed by pathogenic bacteria to counteract stomatal immunity through the example of the phytotoxin coronatine.