Infection of the plant by Xanthomonas

Rudolph, K.

doi:10.1007/978-94-011-1526-1_4

Cited by 50 publications

(32 citation statements)

References 205 publications

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“…Inside the plant, cells of Xac multiply in intracellular space until the spaces become filled with bacteria or exopolysaccharide [4]. The earliest symptoms on leaves appear, under optimum conditions, as slightly raised tiny blisterlike lesions about 4 -7 days after inoculation [5].…”

Section: Introductionmentioning

confidence: 99%

Activity of Secondary Bacterial Metabolites in the Control of Citrus Canker

Murate¹,

Oliveira²,

Higashi³

et al. 2015

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This study investigated the protective effects of secondary bacterial metabolites, produced by Pseudomonas sp. (bacterium strain LN), on citrus canker disease caused by Xanthomonas axonopodis pv. citri (Xac 306). The LN bacteria strain was cultured in liquid medium and the supernatant free-cells was treated with methanol (AMF) and ethyl acetate (AEF), respectively, and then the extract was concentrated, filtrated, lyophilized and fractionated by vacuum liquid chromatography (VLC). After VLC, eight fractions were obtained. All fractions' activity against Xac 306 by agar well diffusion assay and minimum inhibitory concentration but in different concentrations were tested. Cytotoxicity effects were observed in all fractions in 50 µg•mL −1 concentration. The comet assay demonstrated that the fractions EAF, VLC2 and VLC3 presented no genotoxic effects at tested concentrations. In plants only VLC3 showed significant results (p < 0.05), reducing the incidence of citrus canker lesions.

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Section: Introductionmentioning

confidence: 99%

Activity of Secondary Bacterial Metabolites in the Control of Citrus Canker

Murate¹,

Oliveira²,

Higashi³

et al. 2015

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“…These results concorded with previous reports of Ikotun (1982) that free survival of Xam in soils was poor (21 to 28 days) and of Schuster and Coyne (1974) that few bacteria survive in soil in a free state. It was also reported that other xanthomonads could survive in plant debris in or on the soil as long as the debris was not decomposed (Rudolph, 1993). Thus, Xam could survive long in stem debris of which the decay is slow.…”

Section: Discussion:-mentioning

confidence: 96%

“…In the epidemiology of foliar pathogens, survival of cells on non-host plants, especially weeds, may have a far reaching significance. The role of weeds as inoculum sources for phytopathogens (Hirano and Upper, 1983) and generally for xanthomonads (Rudolph, 1993) for disease development on susceptible hosts was suggested in several cases. In cassava growing areas, weeds are most of the time found close to and between cassava fields.…”

Section: Discussion:-mentioning

confidence: 99%

Survival of Xanthomonas Axonopodis Pv. Manihotis in Weed Species and in Cassava Debris : Implication in the Epidemiology of Cassava Bacterial Blight.

Antoine¹,

Valerien²,

Kerstin³

2017

IJAR

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“…Cells of Xap enter common bean plants through hydathodes or through wounds, such as those created by wind-blown soil particles (Rudolph, 1993). Bacterial cells are also readily transmitted mechanically, especially when plants are wet.…”

Section: Infectionmentioning

confidence: 99%

Scientific Opinion on the pest categorisation ofXanthomonas axonopodispv.phaseoliandXanthomonas fuscanssubsp.fuscans

2014

EFSA Journal

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The European Commission requested the EFSA Panel on Plant Health to perform a pest categorisation for Xanthomonas campestris pv. phaseoli. In reaching its conclusions, the Panel considered four parameters to be of critical importance in the risk assessment area: (i) the presence and distribution of X. campestris pv. phaseoli in the risk assessment area and its potential for spread; (ii) the existence and the distribution of the main host plants throughout the European Union (EU); (iii) the potential for damage to crops grown in Europe; and (iv) the implementation of pest control strategies and cultural measures. The organisms formerly identified as X. campestris pv. phaseoli have proven to be genetically diverse and are currently known as Xanthomonas fuscans subsp. fuscans and Xanthomonas axonopodis pv. phaseoli. Based on its analysis, the Panel concluded that the identity of these pathogens is clearly defined and their distribution involves limited areas or regions in the EU, although with a medium uncertainty. The main dispersal pathway for these pathogens is contaminated seeds. In addition, the Panel noted that host plants are widely cropped throughout the EU, common bean Phaseolus vulgaris being of great commercial importance, not only for consumption-fresh, canned, deep frozen and dried-but also for the seed industry. Currently, the impact of common bacterial blight is limited in the EU as a consequence of seed testing. Finally, the Panel concluded that moderate to high consequences, in terms of yield and quality losses, are expected for beans, especially if weather conditions are conducive to disease and seed inoculum no longer contained. © European Food Safety Authority, 2014 KEY WORDSXanthomonas campestris pv. phaseoli, Xanthomonas axonopodis pv. phaseoli, Xanthomonas fuscans subsp. fuscans, common bacterial blight of beans, bacterial leaf pustule and fuscous blight of bean, quarantine pest, regulated non-quarantine pest

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Infection of the plant by Xanthomonas

Cited by 50 publications

References 205 publications

Activity of Secondary Bacterial Metabolites in the Control of Citrus Canker

Activity of Secondary Bacterial Metabolites in the Control of Citrus Canker

Survival of Xanthomonas Axonopodis Pv. Manihotis in Weed Species and in Cassava Debris : Implication in the Epidemiology of Cassava Bacterial Blight.

Scientific Opinion on the pest categorisation ofXanthomonas axonopodispv.phaseoliandXanthomonas fuscanssubsp.fuscans

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