<i>Erwinia</i>

Hauben, Lysiane; Swings, Jean

doi:10.1002/9781118960608.gbm01146

Cited by 5 publications

(4 citation statements)

References 64 publications

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“…Lastly, OTU0141 ( Siccibacter ), OTU0036 ( Clostridium ) and OTU0058 ( Erwinia ) were the final OTUs detected above the 0.1% threshold, with relative abundance in all pulses below 1%. Certain species of Erwinia , such as Erwinia tasmaniensis , are known to be pectolytic bacteria, able to be isolated from plants and associated with vegetable spoilage [ 36 , 37 ]. Therefore, it is not surprising to find the Erwinia genera present in the endogenous pulse community.…”

Section: Resultsmentioning

confidence: 99%

Evaluating the efficacy of non-thermal microbial load reduction treatments of heat labile food components for in vitro fermentation experiments

Paff

Cockburn

2023

PLoS ONE

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Increasingly, in vitro simulated colon fermentations are being used as a pre-clinical step to assess the impacts of foods and drugs on the gut microbiota in a cost-effective manner. One challenge in such systems is that they are potentially susceptible to the influences of contaminating microbes in test materials. Simulated gastric and intestinal digestion can relieve some of these concerns, however, live microbes may remain that can confound analysis. Autoclave treatment of test materials is the surest way to eliminate these microbes but presents problems when using heat labile components such as resistant starch. In this study, liquid chemical sterilant alternatives to moist heat sterilization were explored for treating pulse flours for use during in vitro simulated colon fermentation. Key attributes considered in chemical selection were accessibility, impact on treated food components, and effectiveness of the treatments for reducing microbial load. Three chemicals were selected for evaluation, bleach, alcohol, and hydrogen peroxide, at varying concentrations. Flours chosen for testing were from green lentil, field pea, chickpea, or sprouted green lentil. All treatments significantly reduced microbial loads, though there were still detectable levels of microbes after alcohol treatments. Furthermore, in vitro simulated colon fermentations of the treated pulses showed minimal difference from the untreated control both in terms of microbial composition and short chain fatty acid production. Scanning electron microscopy showed minimal impact of sterilization treatments on the gross structure of the pulse flours. Together these results suggest that bleach and hydrogen peroxide treatments can be effective nonthermal treatments to eliminate contaminating microbes in pulse flours without causing significant damage to starch and other fermentable substrates. This is thus also a promising treatment method for other starchy food substrates, though further testing is required.

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Section: Resultsmentioning

confidence: 99%

Evaluating the efficacy of non-thermal microbial load reduction treatments of heat labile food components for in vitro fermentation experiments

Paff

Cockburn

2023

PLoS ONE

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“…Erwinia mallotivora (Erwiniaceae) is a rod‐shaped gram‐negative bacterium. Colonies on nutrient agar without sucrose are 1.5 mm in diameter, white, raised, transparent, and circular with smooth surfaces and entire margins after 2 days (Figure 1c; Hauben & Swings, 2015). It was first described as the causal agent of the bacterial leaf spot of M. japonicus (Goto, 1976).…”

Section: Methodsmentioning

confidence: 99%

“…Erwinia mallotivora was isolated from leaves with symptoms of the bacteria leaf spot following Hauben and Swings (2015). Leaves with water-soaked lesions were collected from three infected trees in September 2019 in Otsu, Shiga, Japan (34 50 0 N, 135 50 0 E).…”

Section: Isolation Of E Mallotivora From Lesions On Leavesmentioning

confidence: 99%

The effects of the floral infection by a bacterial pathogen in a dioecious plant, Mallotus japonicus (Euphorbiaceae)

2022

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Among all the different organs of a plant, flowers might have one of the most dynamic microbial communities, since many microbes are transmitted during flowering by insects and pollen. However, little is known about how these microbes affect floral characteristics and plant reproduction. Among the microbes transmitted to flowers, pathogens may have highly negative effects on plants' fitness. In this study, we investigated whether a bacterial pathogen, Erwinia mallotivora, occurs on flowers of the host plant Mallotus japonicus, and whether the transmission of the pathogen to flowers can result in systemic infection and/or reduction of fruit production. The pathogen has been reported to infect through leaves, while its ecology on flowers is unknown. We first confirmed the presence of the pathogen on flowers, indicating possible transmission by visitors or pollen. Then, we showed that the bacteria can infect the plant through flowers by inoculating the pathogen to both male and female flowers. Interestingly, the symptoms on leaves appeared earlier on the female plants than on the males. Besides, the inoculation significantly decreased fruit set of the female plants. Our results suggest a higher cost of infection in a female than in a male once the pathogen infected flowers. Although the effects of pathogen infection to flowers have rarely investigated in wild plants, it would be an interesting topic for future study if such sexual differences in the infection cost can cause sexual conflict and intraspecific adaptation load.

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“…Tabla 1. Clasificación taxonómica de Pectobacterium carotovorum Fuente: Adaptada de Hauben & Swings (2015) Actualmente, el género Pectobacterium se divide en seis especies y subespecies, a saber: P. carotovorum subsp. atrosepticum (van Hall), P. betavasculorum (Gardan, Gouy, Christen, & Samson), P. carotovorum subsp.…”

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Pectobacterium carotovorum: agente fitopatógeno causante de la pudrición blanda en la papa (Solanum tuberosum)

Guerrero

Pineda

Vargas

2021

CTA

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La papa (Solanum tuberosum) es un tubérculo de importancia a nivel mundial; es el cuarto cultivo de interés agronómico en términos de producción y área cultivada después del arroz (Oryza sativa), el maíz (Zea mays) y el trigo (Triticum aestivum). Pectobacterium carotovorum es un agente fitopatógeno de la papa que causa la podredumbre blanda del tubérculo, y es considerada como la enfermedad poscosecha más importante, pues genera grandes pérdidas económicas a nivel del almacenamiento. El presente documento pretende dar un esbozo de la biología del patógeno, los métodos existentes para la detección de dicho agente, la descripción del quorum sensing como mecanismo de la regulación de la expresión génica de sus factores de virulencia, el mecanismo de acción del patógeno, el proceso infectivo y los métodos actuales de control.

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Erwinia

Cited by 5 publications

References 64 publications

Evaluating the efficacy of non-thermal microbial load reduction treatments of heat labile food components for in vitro fermentation experiments

Evaluating the efficacy of non-thermal microbial load reduction treatments of heat labile food components for in vitro fermentation experiments

The effects of the floral infection by a bacterial pathogen in a dioecious plant, Mallotus japonicus (Euphorbiaceae)

Pectobacterium carotovorum: agente fitopatógeno causante de la pudrición blanda en la papa (Solanum tuberosum)

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