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首页> 外文期刊>Applied Microbiology >Colonization of Tomato Plants by Salmonella enterica Is Cultivar Dependent, and Type 1 Trichomes Are Preferred Colonization Sites
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Colonization of Tomato Plants by Salmonella enterica Is Cultivar Dependent, and Type 1 Trichomes Are Preferred Colonization Sites

机译：肠炎沙门氏菌对番茄植物的定殖是栽培品种的依赖，而1型毛滴虫是首选的定殖位点

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Nontyphoid salmonellosis caused by Salmonella enterica is the most common bacterial food-borne illness in humans, and fresh produce, including tomatoes, is a common vehicle. Accumulating data indicate that human enteric pathogenic bacteria, including S. enterica , interact actively with plants. Tomato plants were inoculated with S. enterica to evaluate plausible contamination routes and to determine if the tomato cultivar affects S. enterica colonization. S. enterica population levels on tomato leaves were cultivar dependent. S. enterica levels on Solanum pimpinellifolium (West Virginia 700 [WVa700]) were lower than on S. lycopersicum cultivars. S. enterica preferentially colonized type 1 trichomes and rarely interacted with stomata, unlike what has been reported for cut lettuce leaves. Early S. enterica leaf colonization led to contamination of all fruit, with levels as high as 10~(5) CFU per fruit. Reduced bacterial speck lesion formation correlated with reduced S. enterica populations in the phyllosphere. Tomato pedicels and calyxes also harbored large S. enterica populations following inoculation via contaminated water postharvest. WVa700 green fruit harbored significantly smaller S. enterica populations than did red fruit or S. lycopersicum fruit. We found that plants irrigated with contaminated water had larger S. enterica populations than plants grown from seeds planted in infested soil. However, both routes of contamination resulted in detectable S. enterica populations in the phyllosphere. Phyllosphere S. enterica populations pose a risk of fruit contamination and subsequent human disease. Restricting S. enterica phyllosphere populations may result in reduced fruit contamination. We have identified WVa700 as a tomato cultivar that can restrict S. enterica survival in the phyllosphere.
机译：肠沙门氏菌引起的非伤寒沙门氏菌病是人类最常见的细菌性食源性疾病，包括番茄在内的新鲜农产品是常见的媒介。越来越多的数据表明，包括肠炎链球菌在内的人类肠道病原细菌会与植物积极相互作用。用小肠链球菌接种番茄植株，以评估合理的污染途径并确定番茄品种是否影响小肠链球菌的定殖。番茄叶片上小肠链球菌的种群水平与栽培品种有关。马铃薯（Sinum pimpinellifolium）（西弗吉尼亚州700 [WVa700]）上的肠炎链球菌水平低于番茄（S. lycopersicum）品种。肠炎沙门氏菌优先定植在1型毛状体中，很少与气孔相互作用，这与莴苣切叶报道的情况不同。肠炎沙门氏菌早期定植导致所有果实受到污染，每个果实的CFU含量高达10〜（5）CFU。细菌斑点病斑形成的减少与叶球体中肠球菌的减少有关。收获后通过污染的水接种后，番茄梗和花萼也带有大量的肠炎链球菌。 WVa700绿色水果的肠道小肠沙门氏菌种群数量明显少于红色水果或番茄的S. lycopersicum果实。我们发现，用污水灌溉的植物比在受侵染的土壤中种植的种子种植的植物具有更大的肠道沙门氏菌种群。但是，这两种污染途径都导致了在叶球内可检测到的肠道链球菌种群。毛圈球菌肠球菌种群有造成水果污染和随后人类疾病的风险。限制肠炎链球菌的叶圈数量可以减少水果污染。我们已将WVa700确定为番茄品种，可以限制小肠链球菌在叶球体内的存活。

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