Virulência de estirpes (biovar 1 e 2T) de Ralstonia solanaceraum a Eucalyptus spp.

Marques, Eder; Uesugi, Carlos Hidemi; Blum, Luiz Eduardo Bassay

doi:10.1590/s0103-84782013001100005

Cited by 2 publications

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References 9 publications

(10 reference statements)

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“…All isolates were characterized as biovar 1, but with a different profile when studied by membrane protein polyacrylamide electrophoresis and compared to biovar 1 isolates from other hosts. Marques et al (2012) reported the existence of biovar 2T isolates infecting Eucalyptus , and Marques et al (2013) showed a higher virulence of biovar 2T isolates than those from biovar 1. Fonseca et al (2014) showed a predominance of biovar 1 isolates, although molecular analysis indicated that most isolates had unknown sequevars, indicating that the diversity could be greater than that previously indicated based on race and biovar classifications.…”

Section: Brief Historymentioning

confidence: 99%

History and Status of Selected Hosts of the Ralstonia solanacearum Species Complex Causing Bacterial Wilt in Brazil

Lopes

Rossato

2018

Front. Microbiol.

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Bacterial wilt induced by the Ralstonia solanacearum species complex is endemic to Brazil, where it can cause variable losses in many hosts. Its economic importance, however, cannot be precisely measured due to Brazil’s continental size, subject to variable weather conditions which directly affect disease expression. The objectives of this paper were (i) to gather scattered information on historical facts; (ii) to show the current distribution of the pathogen in the country, and (iii) to comment on future trends on the importance of the disease in economically important current and potential hosts, based on the pathogen’s variability and the global climate change under way.

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Section: Brief Historymentioning

confidence: 99%

History and Status of Selected Hosts of the Ralstonia solanacearum Species Complex Causing Bacterial Wilt in Brazil

Lopes

Rossato

2018

Front. Microbiol.

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“…Variation in susceptibility in vegetatively propagated clones of interspecific hybrids is well known. Over the past 50 years, the bulk of the research on this disease on Eucalyptus has focused on screening for resistant/tolerant material ( Gan et al, 2004 ; Li et al, 2007 ; Wang et al, 2011 ; Marques et al, 2013 ; Fonseca et al, 2016 ). Identifying this material and deploying it in plantations is an obvious solution to managing bacterial wilt.…”

Section: Susceptibility Of Eucalyptusmentioning

confidence: 99%

Ralstonia solanacearum and R. pseudosolanacearum on Eucalyptus: Opportunists or Primary Pathogens?

Coutinho

Wingfield

2017

Front. Plant Sci.

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Ralstonia solanacearum and R. pseudosolanacearum are well known primary pathogens of herbaceous crops. Reports of wilt caused by these pathogens in tree species are limited other than on Eucalyptus species. Despite the widespread occurrence of so-called bacterial wilt on eucalypts in tropical and sub-tropical parts of Africa, Asia, and the Americas, there remain many contradictions relating to the disease. Our field observations over many years in most regions where the disease occurs on Eucalyptus show that it is always associated with trees that have been subjected to severe stress. The disease is typically diagnosed by immersing cut stems in water and observing bacterial streaming, but the identity of the bacteria within this suspension is seldom considered. To add to the confusion, pathogenicity tests on susceptible species or clones are rarely successful. When they do work, they are on small plants in greenhouse trials. It has become all to easy to attribute Eucalyptus death exclusively to Ralstonia infection. Our data strongly suggest that Ralstonia species and probably other bacteria are latent colonists commonly occurring in healthy and particularly clonally propagated eucalypts. The onset of stress factors provide the bacteria with an opportunity to develop. We believe that the resulting stress weakens the defense systems of the trees allowing Ralstonia and bacterial endophytes to proliferate. Overall our research suggests that R. solanacearum and R. pseudosolanacearum are not primary pathogens of Eucalyptus. Short of clear evidence that they are primary pathogens of Eucalyptus it is inappropriate to attribute this disease solely to infection by Ralstonia species.

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Virulência de estirpes (biovar 1 e 2T) de Ralstonia solanaceraum a Eucalyptus spp.

Abstract: RESUMO A murcha bacteriana do eucalipto (Raça 3 biovar 2T de

Cited by 2 publications

References 9 publications

History and Status of Selected Hosts of the Ralstonia solanacearum Species Complex Causing Bacterial Wilt in Brazil

History and Status of Selected Hosts of the Ralstonia solanacearum Species Complex Causing Bacterial Wilt in Brazil

Ralstonia solanacearum and R. pseudosolanacearum on Eucalyptus: Opportunists or Primary Pathogens?

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