植物先天免疫——旭日初升？
Plant innate immunity--sunny side up?
作者信息
Stael Simon, Kmiecik Przemyslaw, Willems Patrick, Van Der Kelen Katrien, Coll Nuria S, Teige Markus, Van Breusegem Frank
机构信息
Department of Plant Systems Biology, VIB, 9052 Ghent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium; Department of Medical Protein Research, VIB, 9000 Ghent, Belgium; Department of Biochemistry, Ghent University, 9000 Ghent, Belgium.
Department of Ecogenomics and Systems Biology, Vienna University, Vienna, Austria.
出版信息
Trends Plant Sci. 2015 Jan;20(1):3-11. doi: 10.1016/j.tplants.2014.10.002. Epub 2014 Oct 29.
Reactive oxygen species (ROS)- and calcium- dependent signaling pathways play well-established roles during plant innate immunity. Chloroplasts host major biosynthetic pathways and have central roles in energy production, redox homeostasis, and retrograde signaling. However, the organelle's importance in immunity has been somehow overlooked. Recent findings suggest that the chloroplast also has an unanticipated function as a hub for ROS- and calcium-signaling that affects immunity responses at an early stage after pathogen attack. In this opinion article, we discuss a chloroplastic calcium-ROS signaling branch of plant innate immunity. We propose that this chloroplastic branch acts as a light-dependent rheostat that, through the production of ROS, influences the severity of the immune response.
活性氧（ROS）和钙依赖的信号通路在植物先天免疫过程中发挥着已被充分证实的作用。叶绿体拥有主要的生物合成途径，在能量产生、氧化还原稳态和逆行信号传导中起着核心作用。然而，该细胞器在免疫中的重要性在某种程度上被忽视了。最近的研究结果表明，叶绿体还具有意想不到的功能，即作为ROS和钙信号的枢纽，在病原体攻击后的早期阶段影响免疫反应。在这篇观点文章中，我们讨论了植物先天免疫的叶绿体钙-ROS信号分支。我们提出，这个叶绿体分支作为一个光依赖的变阻器，通过产生ROS来影响免疫反应的强度。
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