First report of mixed infection by Pseudomonas syringae pathovars garcae and tabaci on coffee plantations

Rodrigues, Lucas Mateus Rivero; Sera, Gustavo Hiroshi; Filho, Oliveiro Guerreiro; Beriam, L. O. S.; Almeida, I. M. G.

doi:10.1590/1678-4499.2016.399

Cited by 13 publications

(18 citation statements)

References 10 publications

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“…() in coffee nurseries in São Paulo state. This disease has been reported only in Brazil (Rodrigues et al ., , ; Destéfano et al ., ; Raimundi, ). In the state of São Paulo, BLS was associated with leaf spots on Catuaí plants in a commercial nursery located in Arandu at a disease incidence of 1–2%.…”

Section: Bacterial Leaf Spotmentioning

confidence: 99%

“…The disease is particularly important in nurseries, in which it can cause plant losses of up to 85% (Ramos & Shavdia, ; Okioga, ). In Brazil, similar symptoms have been reported for Psgc (Franco Do Amaral et al ., ; Ramos & Shavdia, ), Pch (Robbs et al ., ; Almeida et al ., ; Raimundi, ), Psta (Rodrigues et al ., , ; Destéfano et al ., ) and Robbsia andropogonis (Ran) (Lopes‐Santos et al ., ; Rodrigues et al ., ), making disease diagnosis difficult in the absence of isolation and characterization of the causal agent or of appropriate detection methods. It is not clear if the importance of the disease caused by Pss has been underestimated because it is confused with BHB caused by Psgc or if some misidentification of the aetiologic agent has occurred.…”

Section: Minor Bacterial Diseasesmentioning

confidence: 99%

“…Molecular and serological methods for specific detection of Psgc in infected tissue have not been reported. Current methods rely on isolation and identification of the bacterium using morphological, physiological and biochemical tests (Zoccoli et al, 2011;Belan et al, 2016;Hinkosa et al, 2016;Rodrigues et al, 2017c). Distinction between Psgc and other P. syringae pathovars is commonly achieved by LOPAT testing (Rodrigues et al, 2017c).…”

Section: Pathogen Detectionmentioning

confidence: 99%

“…Pseudomonas syringae pv. tabaci (Psta) was found to be sympatric and causing mixed infections with Psgc (Rodrigues et al, 2017c). Because symptoms of BLS highly resemble those of BHB, and differentiation between the two P. syringae pathovars causing them using biochemical methods is sometimes difficult, it is probable that the importance of the disease in Brazil has been underestimated.…”

Section: Disease Symptoms Aetiology and Disseminationmentioning

confidence: 99%

“…Coffee production in several countries is threatened by abiotic and biotic stresses, including diseases caused by phytopathogenic bacteria. The four bacterial species Robbsia andropogonis (synonym Burkholderia andropogonis) (Rodrigues Neto et al, 1981), Pseudomonas syringae (Franco Do Amaral et al, 1958;Ramos & Shavdia, 1976;Rodrigues et al, 2006Rodrigues et al, , 2017cDest efano et al, 2010), Pseudomonas cichorii (Robbs et al, 1974;Almeida et al, 2012b) and Xylella fastidiosa (Paradela Filho et al, 1997;Lima et al, 1998) have been reported to cause disease on coffee plants under field conditions. Within P. syringae, pathovars garcae (Amaral et al, 1956;Ramos & Shavdia, 1976;Korobko & Wondinagegne, 1997;Chen, 2002;Bai et al, 2013), tabaci (Rodrigues et al, 2006(Rodrigues et al, , 2017cDest efano et al, 2010) and syringae (Franco Do Amaral et al, 1958;Baker, 1972;Ramos & Shavdia, 1976;Okioga, 1977;Cort es Monllor, 1988) have been associated with similar disease symptoms.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Bacterial Leaf Spotmentioning

confidence: 99%

Section: Minor Bacterial Diseasesmentioning

confidence: 99%

Section: Pathogen Detectionmentioning

confidence: 99%

Section: Disease Symptoms Aetiology and Disseminationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Coffee bacterial diseases: a plethora of scientific opportunities

Badel

Zambolim

2019

Plant Pathology

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Cooperative virulence via the collective action of secreted pathogen effectors

et al. 2023

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Eukaryotes continuously interact with diverse microbial populations and communities, forming relationships spanning a continuum from beneficial to pathogenic. Pathogenic effectors are central to these associations since they directly target host cellular components to promote microbial fitness 1,2 . Although effectors are necessary for virulence and well-studied from the context of single pathogenic strains 3,4 , the extent to which they can modulate population or community dynamics is largely unknown. Here we show that type III effectors of the bacterium Pseudomonas syringae act as public goods to promote the emergence of collective virulence in the plant Arabidopsis thaliana. We disaggregated the effector suite of a P. syringae strain highly virulent on A. thaliana into a coisogenic population with each strain carrying only one effector, (i.e., a metaclone), and showed that while each coisogenic strain in the metaclone is individually unfit, the metaclone cooperates mutualistically to fully restore virulence. We also show that this state of collective virulence emerged irrespective of the microbe's genetic background, being capable of transforming the rhizosphere-inhabiting, beneficial bacterium Pseudomonas fluorescens 5 into a foliar pathogen. These results expand our knowledge of the mechanisms available to polyclonal populations and polymicrobial communities to exploit hosts. They also raise potential evolutionary routes for the emergence of new host-specific pathogens and expand the ecological scale at which disease may be attributed.

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Pseudomonas syringae pv. garcae (bacterial blight of coffee)

2022

CABI Compendium

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First report of mixed infection by Pseudomonas syringae pathovars garcae and tabaci on coffee plantations

Cited by 13 publications

References 10 publications

Coffee bacterial diseases: a plethora of scientific opportunities

Coffee bacterial diseases: a plethora of scientific opportunities

Cooperative virulence via the collective action of secreted pathogen effectors

Pseudomonas syringae pv. garcae (bacterial blight of coffee)

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