Laboratory of Defense in Plant-Pathogen Interactions, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, Japan.
Plant Signal Behav. 2010 Jul;5(7):872-4. doi: 10.4161/psb.5.7.11899. Epub 2010 Jul 1.
Nitric oxide (NO) and reactive oxygen species (ROS) are important signaling molecules in plant immunity. However, roles of NO and ROS in disease resistance to necrotrophic pathogens are not fully understood. We have recently demonstrated that NO plays a pivotal role in basal defense against Botrytis cinerea and the expression of the salicylic acid (SA) -responsive gene PR-1in Nicotiana benthamiana. By contrast, ROS function negatively in resistance or positively in expansion of disease lesions during B. cinerea-N. benthamiana interaction. Here, analysis in NahG-transgenic N. benthamiana showed that SA signaling is not involved in resistance to B. cinerea in N. benthamiana. We discuss how NO and ROS participate in disease resistance to necrotrophic pathogens on the basis of recent reports.
一氧化氮（NO）和活性氧（ROS）是植物免疫中的重要信号分子。然而，NO 和 ROS 在对坏死营养型病原体的抗病性中的作用尚未完全了解。我们最近证明，NO 在对灰葡萄孢的基础防御和烟草原生质体中水杨酸（SA）应答基因 PR-1 的表达中起关键作用。相比之下，ROS 在灰葡萄孢-烟草原生质体相互作用期间，在抗病性中起负作用，而在病害扩展中起正作用。在这里，在 NahG 转基因烟草原生质体中的分析表明，SA 信号转导不参与烟草原生质体对灰葡萄孢的抗性。我们根据最近的报告讨论了 NO 和 ROS 如何参与对坏死营养型病原体的抗病性。
