Consequences of combined herbivore feeding and pathogen infection for fitness of Barbarea vulgaris plants

Mölken, Tamara van; Kuzina, Vera; Munk, Karen Rysbjerg; Olsen, Carl Erik; Sundelin, Thomas; Dam, Nicole M. van; Hauser, Thure P.

doi:10.1007/s00442-014-2928-4

Cited by 33 publications

(20 citation statements)

References 60 publications

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“…The resistance QTL proximal to LUP5 co-located with QTL that have a large effect on the content of four known G-type saponins: hederagenin cellobioside, oleanolic acid cellobioside, gypsogenin cellobioside, and 4-epihederagenin cellobioside. These saponins have been shown to accumulate upon insect and pathogen attack42.…”

Section: Resultsmentioning

confidence: 99%

The genome sequence of Barbarea vulgaris facilitates the study of ecological biochemistry

Byrne

Erthmann

Agerbirk

et al. 2017

Sci Rep

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The genus Barbarea has emerged as a model for evolution and ecology of plant defense compounds, due to its unusual glucosinolate profile and production of saponins, unique to the Brassicaceae. One species, B. vulgaris, includes two ‘types’, G-type and P-type that differ in trichome density, and their glucosinolate and saponin profiles. A key difference is the stereochemistry of hydroxylation of their common phenethylglucosinolate backbone, leading to epimeric glucobarbarins. Here we report a draft genome sequence of the G-type, and re-sequencing of the P-type for comparison. This enables us to identify candidate genes underlying glucosinolate diversity, trichome density, and study the genetics of biochemical variation for glucosinolate and saponins. B. vulgaris is resistant to the diamondback moth, and may be exploited for “dead-end” trap cropping where glucosinolates stimulate oviposition and saponins deter larvae to the extent that they die. The B. vulgaris genome will promote the study of mechanisms in ecological biochemistry to benefit crop resistance breeding.

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Section: Resultsmentioning

confidence: 99%

The genome sequence of Barbarea vulgaris facilitates the study of ecological biochemistry

Byrne

Erthmann

Agerbirk

et al. 2017

Sci Rep

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“…As Pieris caterpillars are known to exploit characteristic chemicals of the Brassicaceae as both feeding stimulants and deterrents (van Loon and Schoonhoven, 1999), we hypothesized that the key to the performance and preferences displayed by P. brassicae lies in changes to the expression of defensive chemicals upon ozone exposure.…”

Section: Effects Of Ozone On P Brassicae Preferencementioning

confidence: 99%

Ozone affects growth and development of Pieris brassicae on the wild host plant Brassica nigra

Khaling

Papazian

Poelman

et al. 2015

Environmental Pollution

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“…Some studies have measured clear negative impacts on plant growth (Paul & Ayres , ) whereas in other cases no effect has been detected (Mölken et al . ). Ecological factors may impede measurement of infection costs for plants; context‐dependent impacts have been detected depending on host genotype (Eubanks, Carr & Murphy ) and the identity of other pathogens and herbivores present at the same time (Eubanks, Carr & Murphy ; Lopez‐Villavicencio et al .…”

Section: Introductionmentioning

confidence: 97%

Local demographic and epidemiological patterns in theLinum marginale–Melampsora liniassociation: a multi‐year study

et al. 2017

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Summary Many theoretical and empirical studies operate from an assumption that pathogens have a significant influence on the fecundity and life span of their host species. However, there are surprisingly little data investigating the long‐term fitness impacts and genetic consequences that arise from pathogen infection in natural populations. Here, we address this gap through the analysis of a dataset investigating the local population dynamics of a native host plant (Linum marginale) and an associated rust pathogen (Melampsora lini) across 12 years. To investigate patterns of disease prevalence and severity and track effects on host fecundity and demography, we conducted censuses on an annual basis at a single site. Annual M. lini infection prevalence ranged from 0% to 99%. Severe epidemics occurred in 3‐ to 4‐year cycles causing high overwintering mortality and subsequent changes in the relative abundance of different host phenotypes. Host population size oscillated in response to epidemics and declined towards the end of the observation period. Changes in host numbers were found to affect disease severity but not infection prevalence. Melampsora lini infection increased L. marginale fecundity; the infected plants produced threefold more seed capsules on average than uninfected plants (13·3 vs. 4·3 seed capsules per plant). To investigate how variation in environmental conditions affects epidemiology and host demography, we identified climatic factors affecting host growth, overwintering and disease severity. Winter (June) rainfall increased host overwintering success and summer (December) rainfall favoured host growth. The progress of M. lini disease epidemics benefited from optimal temperatures in February and suffered from rainfall in January. We further examined links between the genetic structure of the pathogen population and disease dynamics. There was a positive correlation between mean pathogen infectivity (as measured across a host differential set) and the severity of disease epidemics. Synthesis. Our results provide new insights into local drivers and consequences of pathogen epidemiology in natural populations. Melampsora lini infection can have profound consequences on the phenotype, demography and population structure of Linum marginale by increasing host fecundity, overwinter mortality and disease resistance.

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Consequences of combined herbivore feeding and pathogen infection for fitness of Barbarea vulgaris plants

Cited by 33 publications

References 60 publications

The genome sequence of Barbarea vulgaris facilitates the study of ecological biochemistry

The genome sequence of Barbarea vulgaris facilitates the study of ecological biochemistry

Ozone affects growth and development of Pieris brassicae on the wild host plant Brassica nigra

Local demographic and epidemiological patterns in theLinum marginale–Melampsora liniassociation: a multi‐year study

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