Coffee Leaf Scorch Caused by a Strain of <i>Xylella fastidiosa</i> from Citrus

Li, W.-B.; Pria, W. D.; Teixeira, D. C.; Miranda, Vicente S.; Ayres, A. J.; Franco, Caroline; Costa, Marylia Gabriella Silva; He, Chun-Tao; Costa, Paulo Inácio da; Hartung, John

doi:10.1094/pdis.2001.85.5.501

Cited by 76 publications

(74 citation statements)

References 13 publications

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“…It was observed here and in a previous study (37) that X. fastidiosa CLS STs do not colonize citrus plants, whereas citrus-X. fastidiosa STs can multiply in coffee plants when higher inoculum concentrations are used, but the infection likely dies off in the latter host (26,37). Our results match those of Prado et al (37), indicating that citrus and coffee X. fastidiosa isolates are biologically distinct.…”

Section: Discussionsupporting

confidence: 89%

“…CVC emerged in 1987 in northern Sao Paulo state (7,18), and CLS was first reported in 1995 in the same region (35). However, several authors have argued that CLS symptoms were present in coffee plants long before 1987 and were misdiagnosed as nematode infections or plant nutritional imbalances (see reference 26 for discussion on that). In addition, X. fastidiosa was later found to infect coffee plants in other Brazilian regions, suggesting an old association with that host.…”

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confidence: 99%

“…Lastly, to our knowledge only two biological cross-inoculation studies have been conducted with citrus and coffee X. fastidiosa isolates, again with inconclusive results. Li et al (26) showed that CLS can be caused by both coffee and citrus X. fastidiosa isolates. On the other hand, another study showed that a CVC isolate of X. fastidiosa colonized coffee plants but died off over time, whereas no colonization of citrus plants was observed for a CLS isolate (37).…”

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confidence: 99%

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Genetic Structure and Biology of Xylella fastidiosa Strains Causing Disease in Citrus and Coffee in Brazil

Almeida

Nascimento²,

Chau

et al. 2008

Appl Environ Microbiol

121

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Xylella fastidiosa is a vector-borne, plant-pathogenic bacterium that causes disease in citrus (citrus variegated chlorosis [CVC]) and coffee (coffee leaf scorch [CLS]) plants in Brazil. CVC and CLS occur sympatrically and share leafhopper vectors; thus, determining whether X. fastidiosa isolates can be dispersed from one crop to another and cause disease is of epidemiological importance. We sought to clarify the genetic and biological relationships between CVC-and CLS-causing X. fastidiosa isolates. We used cross-inoculation bioassays and microsatellite and multilocus sequence typing (MLST) approaches to determine the host range and genetic structure of 26 CVC and 20 CLS isolates collected from different regions in Brazil. Our results show that citrus and coffee X. fastidiosa isolates are biologically distinct. Cross-inoculation tests showed that isolates causing CVC and CLS in the field were able to colonize citrus and coffee plants, respectively, but not the other host, indicating biological isolation between the strains. The microsatellite analysis separated most X. fastidiosa populations tested on the basis of the host plant from which they were isolated. However, recombination among isolates was detected and a lack of congruency among phylogenetic trees was observed for the loci used in the MLST scheme. Altogether, our study indicates that CVC and CLS are caused by two biologically distinct strains of X. fastidiosa that have diverged but are genetically homogenized by frequent recombination.

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Section: Discussionsupporting

confidence: 89%

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confidence: 99%

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confidence: 99%

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Genetic Structure and Biology of Xylella fastidiosa Strains Causing Disease in Citrus and Coffee in Brazil

Almeida

Nascimento²,

Chau

et al. 2008

Appl Environ Microbiol

121

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“…Coffee leaf scorch has been recorded so far only in Brazil and Costa Rica where the bacterium X. fastidiosa attacks several crops with high incidence, particularly in citrus and prunes. A strain of the bacterium, able to infect coffee, is transmitted by the sharpshooter leafhopper Dilobopterus cortalimai (Cicadellidae: Cicadellinae) and was recorded for the first time in 1995 in the State of S. Paulo (Leite Jr. et al, 1999;Li et al, 2001). Symptoms in affected coffee plants include shortened internodes, premature loss of older leaves, terminal clusters of small pale green to yellow deformed leaves, lateral shoot dieback, and overall plant stunting (De Lima et al, 1998;Li et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Coffee resistance to the main diseases: leaf rust and coffee berry disease

Silva

Várzea

Guerra‐Guimarães

et al. 2006

Braz. J. Plant Physiol.

188

147

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Considerable success has been obtained in the use of classical breeding to control economically important plant diseases, such as the coffee leaf rust and the coffee berry disease (CBD). There is a strong consensus that growing genetically resistant varieties is the most appropriate cost effective means of managing plant diseases and is one of the key components of crop improvement. It has also been recognized that a better knowledge of both, the pathogens and the plant defence mechanisms will allow the development of novel approaches to enhance the durability of resistance. After a brief description of concepts in the field of plant disease resistance, we attempt to give a view of the research progress on coffee leaf rust and CBD concerned with the pathogens infection and variability, coffee breeding for resistance and coffee resistance mechanisms. Key words: Coffea, Colletotrichum kahawae, Hemileia vastatrix, coffee breeding, resistance.Resistência do cafeeiro para suas principais doenças: ferrugem alaranjada das folhas e antracnose dos frutos: Sucesso considerável tem sido obtido no uso do melhoramento clássico para o controle de doenças de plantas economicamente importantes, tais como a ferrugem alaranjada das folhas e a antracnose dos frutos do cafeeiro (CBD). Há um grande consenso de que o uso de plantas geneticamente resistentes é o meio mais apropriado e eficaz em termos de custos do controle das doenças das plantas, sendo também um dos elementos chave do melhoramento da produção agrícola. Tem sido também reconhecido que um melhor conhecimento do agente patogênico e dos mecanismos de defesa das plantas permitirá o desenvolvimento de novas abordagens no sentido de aumentar a durabilidade da resistência. Após uma breve descrição de conceitos na área da resistência das plantas às doenças, nesta revisão tentou-se dar uma idéia do progresso na investigação da ferrugem alaranjada do cafeeiro e do CBD relativamente ao processo de infecção e variabilidade dos agentes patogênicos, melhoramento do cafeeiro para a resistência e mecanismos de resistência do cafeeiro. Palavras-chave: Coffea, Colletotrichum kahawae, Hemileia vastatrix, melhoramento do cafeeiro, resistência.

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“…sandyi [4,7]. Aside from the three defined subspecies, many strains of X. fastidiosa have also been described [2,[5][6][7][8][9][10]. Colonization of the host by X. fastidiosa is not host-specific, but pathogenicity of X. fastidiosa exhibits a degree of host specificity.…”

Section: Introductionmentioning

confidence: 99%