Bacterial lipopolysaccharides as inducers of disease resistance in tobacco

Graham, Terrence L.; Sequeira, Luís; Huang, Tsung-Yi

doi:10.1128/aem.34.4.424-432.1977

Cited by 131 publications

(47 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Conversely, signal perception and transduction in tobacco leaves in response to the lipopolysaccharide (LPS) from the avirulent bacterium Burkholderia cepacia (LPS Bcep) is independent of the HR (Piater et al, 2004). This observation is in accordance with the prevention of HR by LPS reported previously (Graham et al, 1977;Coventry and Dubery, 2001).…”

Section: Establishment Of the Hypersensitive Reactionsupporting

confidence: 84%

Activation of defence reactions in Solanaceae: where is the specificity?

Desender

Andrivon

Val³

2007

Cell Microbiol

View full text Add to dashboard Cite

SummaryWhen a potential pathogen attempts to infect a plant, biochemical and molecular communication takes place and leads to the induction of plant defence mechanisms. In the case of efficient defence, visible symptoms are restricted and the pathogen does not multiply (incompatible interaction); when defence is inefficient, the plant becomes rapidly infected (compatible interaction). During the last 30 years, a growing body of knowledge on plant-pathogen interactions has been gathered, and a large number of studies investigate the induction of various plant defence reactions by pathogens or by pathogenderived compounds. However, as most papers focus on incompatible interactions, there is still a lack of understanding about the similarities and differences between compatible and incompatible situations. This review targets the question of specificity in Solanaceae-pathogen interactions, by comparing defence patterns in plants challenged with virulent or avirulent pathogens (or with pathogen-associated molecular patterns from these). A special emphasis is made on analysing whether defence reactions in Solanaceae depend primarily on the type of elicitor, on the plant genotype/species, or on the type of interaction (compatible or incompatible).

show abstract

Section: Establishment Of the Hypersensitive Reactionsupporting

confidence: 84%

Activation of defence reactions in Solanaceae: where is the specificity?

Desender

Andrivon

Val³

2007

Cell Microbiol

View full text Add to dashboard Cite

show abstract

“…Only avirulent forms were agglutinated by potato lectin in vitro, and there is some electron micrograph evidence that binding and arrest of growth of avirulent, but not of virulent cells, occurs in plant tissues . The binding sites for the lectin were thought to be located in the lipid A portion of the bacterial cell wall lipopolysaccharides GRAHAM 1977, GRAHAM et al 1977). A similar relationship has been reported recently between virulent and avirulent strains of Erwinia amylovora and Pseudomonas pisi in apple and tobacco plants respectively (HUANG et al 1975, GOODMAN et al 1977 and between Pseudomonas phaseoUcola, P. tomato (pathogens) and P. putida (saprophyte) in bean plants (SING and SCHROTH 1977).…”

supporting

confidence: 66%

Interactions between Potato Lectin and some Phytobacteria in Relation to Potato Tuber Decay caused by Erwinia carotovora

Ghanekar

Pérombelon

1980

J Phytopathol

View full text Add to dashboard Cite

“…From this ¢nding it was concluded that bacterial LPS can locally prevent HR normally induced by avirulent bacteria. This activity was shown to reside in the LPS of R. solanacearum, spec-i¢cally in the lipid A^core structure [47]. This e¡ect was later termed 'localized induced resistance' by Sequeira and co-workers [48], who considered that the plant response to LPS re£ects an enhanced antimicrobial environment within the plant which prevented bacterial growth and hence HR.…”

Section: Lps and Pathogenesismentioning

confidence: 99%

O-antigen structural variation: mechanisms and possible roles in animal/plant–microbe interactions

Lerouge¹

2001

FEMS Microbiology Reviews

View full text Add to dashboard Cite

Current data from bacterial pathogens of animals and from bacterial symbionts of plants support some of the more general proposed functions for lipopolysaccharides (LPS) and underline the importance of LPS structural versatility and adaptability. Most of the structural heterogeneity of LPS molecules is found in the O-antigen polysaccharide. In this review, the role and mechanisms of this striking flexibility in molecular structure of the O-antigen in bacterial pathogens and symbionts are illustrated by some recent findings. The variation in O-antigen that gives rise to an enormous structural diversity of O-antigens lies in the sugar composition and the linkages between monosaccharides. The chemical composition and structure of the O-antigen is strain-specific (interstrain LPS heterogeneity) but can also vary within one bacterial strain (intrastrain LPS heterogeneity). Both LPS heterogeneities can be achieved through variations at different levels. First of all, O-polysaccharides can be modified non-stoichiometrically with sugar moieties, such as glucosyl and fucosyl residues. The addition of non-carbohydrate substituents, i.e. acetyl or methyl groups, to the O-antigen can also occur with regularity, but in most cases these modifications are again non-stoichiometric. Understanding LPS structural variation in bacterial pathogens is important because several studies have indicated that the composition or size of the O-antigen might be a reliable indicator of virulence potential and that these important features often differ within the same bacterial strain. In general, O-antigen modifications seem to play an important role at several (at least two) stages of the infection process, including the colonization (adherence) step and the ability to bypass or overcome host defense mechanisms. There are many reports of modifications of O-antigen in bacterial pathogens, resulting either from altered gene expression, from lysogenic conversion or from lateral gene transfer followed by recombination. In most cases, the mechanisms underlying these changes have not been resolved. However, in recent studies some progress in understanding has been made. Changes in O-antigen structure mediated by lateral gene transfer, O-antigen conversion and phase variation, including fucosylation, glucosylation, acetylation and changes in O-antigen size, will be discussed. In addition to the observed LPS heterogeneity in bacterial pathogens, the structure of LPS is also altered in bacterial symbionts in response to signals from the plant during symbiosis. It appears to be part of a molecular communication between bacterium and host plant. Experiments ex planta suggest that the bacterium in the rhizosphere prepares its LPS for its roles in symbiosis by refining the LPS structure in response to seed and root compounds and the lower pH at the root surface. Moreover, modifications in LPS induced by conditions associated with infection are another indication that specific structures are important. Also during the differentiation from bacterium to bact...

show abstract

Bacterial lipopolysaccharides as inducers of disease resistance in tobacco

Cited by 131 publications

References 46 publications

Activation of defence reactions in Solanaceae: where is the specificity?

Activation of defence reactions in Solanaceae: where is the specificity?

Interactions between Potato Lectin and some Phytobacteria in Relation to Potato Tuber Decay caused by Erwinia carotovora

O-antigen structural variation: mechanisms and possible roles in animal/plant–microbe interactions

Contact Info

Product

Resources

About