Structure and variation in the wild-plant pathosystem: Lactuca serriola–Bremia lactucae

Lebeda, A.; Petrželová, I.; Maryška, Zbyněk

doi:10.1007/978-1-4020-8973-2_10

Cited by 17 publications

(40 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some partial results had been published previously Petrželová 2004b, 2007a, b;Lebeda et al 2008). In this paper we present a more detailed analysis of various aspects of resistance variation within populations of L. serriola.…”

Section: Introductionmentioning

confidence: 88%

“…For the 17 Lactuca species described from Europe (Lebeda et al 2001a), only seven are known as natural hosts of B. lactucae . Of these seven species, L. serriola is the most common wild host of B. lactucae, as has recently been published for the Czech Republic Lebeda et al , 2008 and the Netherlands (Hooftman et al 2006). In other European countries only sporadic occurrences of natural infections by B. lactucae were recorded during collection of Lactuca spp.…”

Section: Introductionmentioning

confidence: 93%

“…Regional differences in migration rates may result in large differences and variation among individual local populations but these represent only small pieces of a highly diverse mosaic of resistance and virulence phenotypes over a larger area. Most of the studies mentioned above also highlighted the necessity for parallel studies of the population structure of both participants in interactions between plants and obligate biotrophic pathogens (Clarke and Akhka 2002;Holub 2008;Lebeda et al 2008), especially because their populations are, of necessity, closely interconnected in a coevolutionary sense. Knowledge of populations of one species (either host or pathogen) within these interactions may help to explain much of the behavior of the populations of coevolving species.…”

Section: Introductionmentioning

confidence: 96%

“…However, we recently acquired a large amount of information for the Czech pathogen populations of B. lactucae on the wild host L. serriola (Lebeda 2002;Lebeda and Petrželová 2004a;Petrželová and Lebeda 2004b;Lebeda et al 2008). However, to date there are no corresponding detailed data for resistance variation in Czech host plant populations.…”

Section: Introductionmentioning

confidence: 97%

“…Filipendula ulmaria-Triphragmium ulmariae (Ericson et al 2002;Smith et al 2003); Plantago lanceolata-Podosphaera plantaginis (Laine 2004(Laine , 2005Laine and Hanski 2006;Laine 2007); Senecio vulgaris-Erysiphe fischeri (Bevan et al 1993a, b, c); Silene spp.-Ustilago violacea (Microbotryum violaceum) (Thrall and Antonovics 1995;Alexander et al 1996;Delmotte et al 1999;CarlssonGranér and Thrall 2002;Carlsson-Granér 2006); and Valeriana salina-Uromyces valerianae (Ericson et al 1999). However, there is a large knowledge gap regarding interactions between weed host plants and oomycetes (Holub 2008;Lebeda et al 2008), despite the fact that oomycete pathogens represent an important group of species which are common in nature and have a world-wide distribution (Lebeda and Schwinn 1994).…”

Section: Introductionmentioning

confidence: 98%

See 4 more Smart Citations

Distribution of race-specific resistance against Bremia lactucae in natural populations of Lactuca serriola

Petrželová

Lebeda

2010

Eur J Plant Pathol

Self Cite

View full text Add to dashboard Cite

A metapopulation approach was applied to population studies of a common weed, Lactuca serriola (prickly lettuce). Seedlings grown from seed samples collected from 752 individual L. serriola plants in 50 populations occurring along an east-to-west transect across four European countries (Czech Republic, Germany, Netherlands and United Kingdom) were screened for resistance to 10 common races of Bremia lactucae. Based on the recorded reaction patterns, host individuals were characterized into specific resistance (R-) phenotypes. Diversity of R-phenotypes, their variation and distribution among and within European populations, was evaluated at different spatial scales, i.e. from a metapopulation involving the entire European study area to individual plants occurring in local populations. Generally, European populations of L. serriola have been shown to be highly susceptible to B. lactucae. However, large variation in L. serriola resistance was found both among and within individual countries. There was a clear gradient of increasing uniformity of race-specificity moving from central to western Europe, as well as a slight decrease in the diversity of R-phenotypes. Populations in the United Kingdom were the most divergent in terms of resistance structure from other geographic regions, and also were the most homogeneous, most likely a consequence of the relatively greater degree of spatial isolation from other regions. Metapopulation, interand intra-population variation in host resistance is discussed from the viewpoint of occurrence of racespecific interactions in this wild plant pathosystem.

show abstract

Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Distribution of race-specific resistance against Bremia lactucae in natural populations of Lactuca serriola

Petrželová

Lebeda

2010

Eur J Plant Pathol

Self Cite

View full text Add to dashboard Cite

show abstract

Diversity of defence mechanisms in plant–oomycete interactions: a case study of Lactuca spp. and Bremia lactucae

Lebeda

Sedlářová

Petřivalský

et al.

The Downy Mildews - Genetics, Molecular Biology and Control

View full text Add to dashboard Cite

Phylogenetic investigations in the downy mildew genus Bremia reveal several distinct lineages and a species with a presumably exceptional wide host range

et al. 2010

View full text Add to dashboard Cite

Bremia lactucae is one of the most devastating and widespread pathogens in lettuce production worldwide. Despite its economical importance, uncertainty prevails about the species delimitation in the genus Bremia. Commonly, Bremia is considered to be monotypic, containing only Bremia lactucae, while taxonomists have described additional species, and molecular phylogenetic studies have shown significant sequence divergence between accessions from different hosts. Here, we report that several previously described species are genetically highly distinct from Bremia lactucae parasitic to Lactuca sativa. These include Bremia lapsanae, Bremia sonchicola, and Bremia taraxaci. In addition to these host-specific species, a plurivorous species is revealed, which infects hosts from three different tribes in the Asteraceae subfamilies Asteroideae and Carduoideae. The broad host range of clade 1 is exceptional for downy mildews and only paralleled by Pseudoperonospora cubensis, which infects a broad range of Cucurbitaceae. The taxonomic status of Bremia cirsii and of Bremia centaureae remains unresolved, as the accessions from Cirsium and Centaurea, respectively, did not form a monophylum but were partly contained in the plurivorous clade 1. Bremia lactucae was found to be restricted to Lactuca sativa and Lactuca serriola. Thus, it can be assumed that Bremia infections on weeds apart from Lactuca species do not pose a significant risk for lettuce production. However, it is unlikely that breeding resistance genes from Lactuca serriola into Lactuca sativa will result in durable resistance of lettuce to downy mildew disease, because the current study provides additional evidence that Bremia accessions from both hosts form a population continuum.

show abstract

Structure and variation in the wild-plant pathosystem: Lactuca serriola–Bremia lactucae

Cited by 17 publications

References 59 publications

Distribution of race-specific resistance against Bremia lactucae in natural populations of Lactuca serriola

Distribution of race-specific resistance against Bremia lactucae in natural populations of Lactuca serriola

Diversity of defence mechanisms in plant–oomycete interactions: a case study of Lactuca spp. and Bremia lactucae

Phylogenetic investigations in the downy mildew genus Bremia reveal several distinct lineages and a species with a presumably exceptional wide host range

Contact Info

Product

Resources

About