Assessment of the genetic diversity of <i>Xylella fastidiosa</i> in imported ornamental <i>Coffea arabica</i> plants

Bergsma-Vlami, M.; Bilt, J. L. J. van de; Tjou-Tam-Sin, N. N. A.; Helderman, C. M.; Gorkink-Smits, P. P. M. A.; Landman, N. M.; Veen, Esther J. van; Westenberg, Marcel

doi:10.1111/ppa.12696

Cited by 28 publications

(32 citation statements)

References 31 publications

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“…The unexpected virulence exhibited by the olive Xf strain in Italy heightened concerns about the risk of its spread within the EU, prompting urgent mandatory surveys to the member states. As a result, new cases of interceptions/introductions of Xf have been recorded in Europe (Loconsole et al, 2016;Bergsma-Vlami et al, 2017;Denanc e et al, 2017). In October 2016, Xf was first found at a garden centre in Mallorca (Olmo et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Insights into the epidemiology of Pierce's disease in vineyards of Mallorca, Spain

Moralejo¹,

Borràs

Gomila

et al. 2019

Plant Pathology

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Xylella fastidiosa (Xf), the causal agent of Pierce's disease (PD), has long been considered a major threat to prosperous European viticulture. In May of 2017, PD was officially detected on a grapevine in Mallorca. To better understand the epidemiology of the first established outbreak of PD in Europe, the disease incidence and severity were assessed, vector transmission experiments were performed, and cultivar responses to Xf infections both in the field and in inoculation experiments were monitored. The genetic structure of Xf local populations was also investigated by multilocus sequence typing analysis, and their whole genome sequences and phylogenetic positions compared with respect to PD strains worldwide. Disease incidence was moderately low (0.07) and highly variable, ranging from 0.0 to 0.99. Its economic impact on wine production was considered low. Vineyards managed under conventional viticulture were significantly less infected than organic farming. Under greenhouse conditions, the insect Philaenus spumarius efficiently transmitted the pathogen from infected to healthy grapevines. In the inoculation experiments, Xf infected, to some degree, 29 of the 30 cultivar × rootstock combinations (n = 239). Cultivars Viura, Gorgollasa and Sauvignon Blanc were the most susceptible ones. All Xf isolates from grapevines belonged to sequence type ST1; they phylogenetically clustered within the Californian ST1 clade, with which they shared a 99.94% identity and the same plasmid. In addition, ST1 caused almond leaf scorch disease, where notably its incidence (0.78) and severity was much higher than PD. The likely reasons for these wide differences are discussed in the context of a 20‐year Xf introduction scenario.

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Section: Introductionmentioning

confidence: 99%

Insights into the epidemiology of Pierce's disease in vineyards of Mallorca, Spain

Moralejo¹,

Borràs

Gomila

et al. 2019

Plant Pathology

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“… * The indications contained in this table are based on the data published by Bergsma‐Vlami et al . (), for coffee; National Institute of Biology, SI; and Loconsole et al . () for other plants.…”

Section: Detectionmentioning

confidence: 99%

PM 7/24 (4) Xylella fastidiosa

2019

EPPO Bulletin

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“…Overall, those studies also indicate that citrus strains are genetically different from coffee strains, but that some recombination between the two populations can occur (Almeida et al ., ; Nunney et al ., ). MLST analysis showed that different X. fastidiosa STs can cause disease on the same host plant (Coletta‐Filho et al ., ; Bergsma‐Vlami et al ., ), in particular on C. arabica (Bergsma‐Vlami et al ., ). Also, the same ST can cause disease on different host plants (Nunney et al ., ) and the same ST that affects coffee plants has been recorded in very distant geographic areas (Loconsole et al ., ; Nunney et al ., ; Almeida & Nunney, ; Coletta‐Filho et al ., ).…”

Section: Coffee Leaf Scorchmentioning

confidence: 99%

Coffee bacterial diseases: a plethora of scientific opportunities

Badel

Zambolim

2019

Plant Pathology

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Coffee is a very important crop for several tropical countries across different continents. The diseases bacterial halo blight (BHB), bacterial leaf spot (BLS), bacterial leaf blight (BLB) and coffee leaf scorch (CLS), caused by the bacterial pathogens Pseudomonas syringae pv. garcae (Psgc), P. syringae pv. tabaci (Psta), Pseudomonas cichorii (Pch) and Xylella fastidiosa subsp. pauca (Xfp), respectively, cause significant reductions in coffee production, although other minor bacterial diseases have also been reported in some countries. Little research progress has been made on aspects that are relevant for control and management of these diseases. In all cases, there is an urgent need to develop rapid and more reliable methods for early detection of the pathogens in order to minimize their negative impact on coffee production. Because of the high rate of intra‐ and intersubspecific recombination occurring in X. fastidiosa, a permanent revision of the detection methods is necessary. Greater efforts should be made to understand the genetic and virulence diversity of Psgc, Psta and Pch populations. Early studies reported the identification of potential sources of resistance against Psgc and Psta, but, to date, no resistance gene has been isolated. Little effort has been made to understand the biology and molecular mechanisms underlying the interaction between Coffea spp. and these pathogenic bacteria. This review discusses the recent progress on the molecular mechanisms used by these bacteria to cause diseases on other plant species, in order to provide a guideline for the establishment of future research programmes.

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Assessment of the genetic diversity of Xylella fastidiosa in imported ornamental Coffea arabica plants

Cited by 28 publications

References 31 publications

Insights into the epidemiology of Pierce's disease in vineyards of Mallorca, Spain

Insights into the epidemiology of Pierce's disease in vineyards of Mallorca, Spain

PM 7/24 (4) Xylella fastidiosa

Coffee bacterial diseases: a plethora of scientific opportunities

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