摘要
丁香假单胞菌番茄致病变种(Pst DC3000)是导致番茄细菌性叶斑病的主要病原体,严重威胁番茄产量和品质。Pst DC3000是一种局部感染的半生物营养性病原菌,其Ⅲ型分泌系统和冠状毒素生物合成与植物免疫抑制密切相关。Pst DC3000引发的植物免疫反应涉及病原相关分子模式触发免疫和效应器触发免疫两个途径,共同增强植物对病原菌的防御能力,其中水杨酸和茉莉酸信号传导途径在植物免疫防御机制中发挥核心作用。活性氧作为关键信号分子,在植物免疫反应中起“双重作用”,其参与促进植物生长和逆境胁迫下的信号传导,因过量积累导致细胞程序性死亡。文章总结Pst DC3000的抗病机制,为探讨植物激素和活性氧在植物免疫中的作用机制提供新的思路和方法。
Pseudomonas syringae pv.tomato DC3000,often abbreviated as Pst DC3000,is a key cause of bacterial leaf spot in tomatoes.This disease can severely impact both the quantity and quality of the tomato harvest.Pst DC3000 is a pathogen that infects plants locally and relies on living organisms for nutrients.Its typeⅢsecretion system and the production of a toxin called coronatine are essential for suppressing the plant's immune system.Upon encountering Pst DC3000,plants initiate two key immune response mechanisms:pattern recognition receptor(PRR)-triggered immunity and effector-triggered immunity.These mechanisms collectively strengthen the plant's defenses against the pathogen.Salicylic acid and jasmonic acid are central to the plant's immune defense system.They are involved in signal transduction pathways that help the plant recognize and respond to pathogens.Reactive oxygen species(ROS)serves a dual role as a vital signaling molecule in the plant immune response. They are indispensable for promoting plant growth and facilitating signal transduction duringstress. However, if ROS accumulates excessively, they can trigger programmed cell death, which canbe detrimental to the plant. This research not only reviewed the disease resistance mechanisms of PstDC3000, but also offered novel insights and approaches for investigating the roles of plant hormonesand reactive oxygen species in plant immunity.
作者
王傲雪
田雨鑫
白怡潇
WANG Aoxue;TIAN Yuxin;BAI Yixiao(School of Horticulture and Landscape Architecture,Northeast Agricultural University,Harbin 150030,China;School of Life Sciences,Northeast Agricultural University,Harbin 150030,China)
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2024年第6期90-98,共9页
Journal of Northeast Agricultural University
基金
国家自然科学基金面上项目(32072588)
泰山产业领军人才工程项目。
关键词
丁香假单胞菌
抗病机制
激素信号传导
水杨酸
茉莉酸
活性氧
Pst DC3000
disease resistance mechanism
hormone signal transduction
salicylic acid
jasmonic acid
reactive oxygen species
