大肠埃希菌O157:H7植物组织内生化研究概况

发布时间：2018-05-25 22:59

本文选题：大肠埃希菌O + H　；参考：《浙江大学学报(农业与生命科学版)》2015年01期

【摘要】：人畜共患病原菌大肠埃希菌O157:H7是一种产志贺毒素的典型菌株,人体感染后会引起出血性腹泻和肠炎,且可并发溶血性尿毒综合征、血栓性血小板减少性紫癜等疾病,严重时可致人死亡。人畜粪肥携带的大肠埃希菌O157:H7等病原菌可通过污灌、径流、农田施用和昆虫传播等途径进入到土壤环境中,污染种植的水果和蔬菜,使其成为传播大肠埃希菌O157:H7的重要媒介,对公众健康构成了严重威胁。大肠埃希菌O157:H7可从植物表面自身通道(如气孔、皮孔和侧根发生处等)或表面损伤(生物损伤或物理损伤等)等途径进入植物体内,随宿主植物的细胞分化在植物体内繁殖,与宿主植物构成特殊的共生关系,但不形成特殊结构,也不引发植物体外观形态改变。然而,大肠埃希菌O157:H7植物内生化与植物体损伤程度、植物免疫系统及其模式识别受体(pattern recognition receptors,PRRs)、附生植物微生物群落和根际土壤微生物群落等因素之间存在复杂的交互作用。该文对大肠埃希菌O157:H7的污染来源、植物组织内生化途径及其影响因素等进行了综合的阐述,为深入了解人畜共患病原菌植物内生化机制和污染风险提供参考,以便降低人畜共患病原菌对人类健康和环境安全的危害。
[Abstract]:Escherichia coli (O157:H7), a zoonotic pathogen, is a typical strain producing Shigella toxin. It can cause hemorrhagic diarrhea and enteritis after infection, and can be complicated with hemolytic uremic syndrome, thrombotic thrombocytopenic purpura and other diseases, such as hemolytic uremic syndrome, thrombotic thrombocytopenic purpura and so on. It can cause death in serious cases. Pathogenic bacteria such as Escherichia coli O157:H7 carried by human and animal manure can enter the soil environment by means of sewage irrigation, runoff, farmland application and insect transmission, which pollute the cultivated fruits and vegetables, and make them become an important medium for the transmission of Escherichia coli O157:H7. Pose a serious threat to public health. Escherichia coli (O157:H7) can enter the plant through its own channels (such as stomata, lenticels and lateral roots, etc.) or surface damage (biological or physical damage, etc.), and reproduce in plants with the differentiation of host plant cells. It formed a special symbiotic relationship with the host plant, but it did not form a special structure or cause the appearance and morphological change of the plant. However, there are complex interactions between plant biochemistry and plant damage degree of Escherichia coli O157:H7, plant immune system and its pattern recognition receptor O157:H7, epiphytic microbial community and rhizosphere soil microbial community. In this paper, the pollution source of Escherichia coli (O157:H7), the biochemistry pathway of plant tissue and its influencing factors were comprehensively expounded, which provided a reference for further understanding the plant biochemistry mechanism and pollution risk of zoonotic pathogens. In order to reduce the harm of zoonotic pathogens to human health and environmental safety.
【作者单位】：浙江大学环境与资源学院土水资源与环境研究所浙江省亚热带土壤与植物营养重点开放实验室;
【基金】：国家自然科学基金资助项目(40971255)
【分类号】：R378

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