Research progress on disease resistance mechanism of Pseudomonas syringae pv. tomato DC3000 ( Pst DC3000 )
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 type Ⅲ secretion 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 during stress. However,if ROS accumulates excessively,they can trigger programmed cell death,which can be detrimental to the plant. This research not only reviewed the disease resistance mechanisms of Pst DC3000,but also offered novel insights and approaches for investigating the roles of plant hormones and reactive oxygen species in plant immunity.
Pst DC3000disease resistance mechanismhormone signal transductionsalicylic acidjasmonic acidreactive oxygen species
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维普
