Selection for chemical trait remixing in an invasive weed after reassociation with a coevolved specialist

Zangerl, Arthur R.; Stanley, Margaret C.; Berenbaum, May R.

doi:10.1073/pnas.0710280105

Cited by 65 publications

(65 citation statements)

References 50 publications

(39 reference statements)

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“…Likewise, re-introduction of co-evolved specialist herbivores can result in allelochemical shifts in introduced plant populations (e.g. Zangerl and Berenbaum 2005;Zangerl and Berenbaum 2008). In addition to such evolutionary changes, allelochemical concentrations may vary due to induced responses to plant damage, which may involve either active or passive responses and include both induced resistance and induced susceptibility (Karban and Myers 1989;Karban and Baldwin 1997;Karban 2011).…”

Section: Introductionmentioning

confidence: 99%

Soil nitrogen availability and herbivore attack influence the chemical defenses of an invasive plant (Linaria dalmatica; Plantaginaceae)

Jamieson

Bowers

2011

Chemoecology

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Chemical defenses are thought to contribute to the invasion success and impacts of many introduced plants; however, for most of these species, little is known about these compounds and how they vary in natural environments. Plant allelochemical concentrations may be affected by a variety of abiotic and biotic factors, including soil nutrients and herbivores. Moreover, such quantitative variation is likely to play an important role in species interactions involving these invasive plants. The purpose of this study was to examine patterns of variation in iridoid glycoside concentrations of the invasive plant Linaria dalmatica (Plantaginaceae). We conducted a greenhouse experiment to investigate the effect of soil nitrogen availability on iridoid glycoside concentrations. Results from this experiment showed that plant iridoid glycoside concentrations decreased with increased nitrogen availability. Additionally, plants were collected from multiple field sites in order to characterize the influence of population, soil nitrogen availability, and herbivore attack on iridoid glycoside variation. Results from field studies indicated that plants demonstrated considerable seasonal variation, as well as variation within and among populations, with iridoid glycoside concentrations ranging from approximately 1 to 15% dry weight. The relationship between soil nitrogen and plant iridoid glycosides varied among populations, with a strong negative correlation in one population, a marginally significant negative relationship in a second population, and no relationship in the remaining two populations. Additionally, we found a negative relationship between iridoid glycoside concentrations and plant injury by an introduced biocontrol agent, the stem-mining weevil Mecinus janthinus (Cucurlionidae). These results show that plant allelochemical concentrations can vary widely in natural environments and suggest that levels of plant defense may be reduced by increased soil nitrogen availability and herbivore attack in this invasive plant species.

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Section: Introductionmentioning

confidence: 99%

Soil nitrogen availability and herbivore attack influence the chemical defenses of an invasive plant (Linaria dalmatica; Plantaginaceae)

Jamieson

Bowers

2011

Chemoecology

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“…Despite the relatively short exposure time of most invasive plant species to biological control organisms, we believe that comparison of invasive populations with and without a biological control history offers new opportunities to test the evolutionary trajectories of plant species in the presence and absence of specialist natural enemies (Joshi and Vrieling 2005;Handley et al 2008). It is expected that invasive plants experience especially strong selection from specialist herbivores in successful biological control projects (Crawley 1983;McEvoy et al 1991;Crutwell McFadyen 1998;Maron and Vilà 2008;Zangerl et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Is there rapid evolutionary response in introduced populations of tansy ragwort, Jacobaea vulgaris, when exposed to biological control?

et al. 2010

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Differences in the herbivore community between a plant's native (specialists and generalists) and introduced range (almost exclusively generalists) may lead to the evolution of reduced allocation to defences against specialist herbivores in the introduced range, allowing for increased allocation to competitive ability and to defences against generalist herbivores. Following this logic, the introduction of biological control agents should reverse this evolutionary shift and select for plants with life-history traits that are more similar to those of plants in the native range than those of plants in the introduced range that have not been exposed to biological control. In a common garden experiment, we compared performance and resistance traits of tansy ragwort, Jacobaea vulgaris, among populations from the introduced range (New Zealand and North America) that have either been exposed to or grown free from the biological control agent Longitarsus jacobaeae. For comparison, we included populations from the native European range. We found lower levels of generalist-deterrent pyrrolizidine alkaloids (PAs) and of soluble phenolics in New Zealand populations with than in populations without exposure to L. jacobaeae, while the opposite pattern was detected among North American populations. Contrary to expectation, populations with exposure to L. jacobaeae revealed more feeding damage by L. jacobaeae than populations without exposure. Introduced populations had higher levels of PAs and reproductive output than native J. vulgaris populations. Jacobaea vulgaris was introduced in different parts of the world some 100-130 years ago, while L. jacobaeae was introduced only some 20-40 years ago. Hence, the larger differences observed between native and introduced populations, as compared to introduced C. Rapo Á U.

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“…The repetition of this process may lead to the high level of diversity observed in chemical structures and their amounts (Ehrlich and Raven, 1964) and variation in bioactivity of the different structures ). An alternative option is that the variation may represent a stable cycling of phenotypic classes (Berenbaum and Zangerl, 1998;Zangerl et al, 2008). The concomitant and often correlated variation in both chemical structure and the total amount of a given class of chemical defense complicates the ability to separate the contribution of these two factors to plant protection Giamoustaris and Mithen, 1996).…”

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confidence: 99%

A Novel 2-Oxoacid-Dependent Dioxygenase Involved in the Formation of the Goiterogenic 2-Hydroxybut-3-enyl Glucosinolate and Generalist Insect Resistance in Arabidopsis

et al. 2008

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Glucosinolates are secondary metabolites found almost exclusively in the order Brassicales. They are synthesized from a variety of amino acids and can have numerous side chain modifications that control biological function. We investigated the biosynthesis of 2-hydroxybut-3-enyl glucosinolate, which has biological activities including toxicity to Caenorhabditis elegans, inhibition of seed germination, induction of goiter disease in mammals, and production of bitter flavors in Brassica vegetable crops. Arabidopsis (Arabidopsis thaliana) accessions contain three different patterns of 2-hydroxybut-3-enyl glucosinolate accumulation (present in leaves and seeds, seeds only, or absent) corresponding to three different alleles at a single locus, GSL-OH. Fine-scale mapping of the GSL-OH locus identified a 2-oxoacid-dependent dioxygenase encoded by At2g25450 required for the formation of both 2R-and 2S-2-hydroxybut-3-enyl glucosinolate from the precursor 3-butenyl glucosinolate precursor. Naturally occurring null mutations and T-DNA insertional mutations in At2g25450 exhibit a complete absence of 2-hydroxybut-3-enyl glucosinolate accumulation. Analysis of herbivory by the generalist lepidopteran Trichoplusia ni showed that production of 2-hydroxybut-3-enyl glucosinolate provides increased resistance. These results show that At2g25450 is necessary for the hydroxylation of but-3-enyl glucosinolate to 2-hydroxybut-3-enyl glucosinolate in planta and that this metabolite increases resistance to generalist herbivory.

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Selection for chemical trait remixing in an invasive weed after reassociation with a coevolved specialist

Abstract: The interaction betweeninsect-plant interactions ͉ Lepidoptera ͉ Pastinaca sativa ͉ parsnip webworm ͉ herbivore

Cited by 65 publications

References 50 publications

Soil nitrogen availability and herbivore attack influence the chemical defenses of an invasive plant (Linaria dalmatica; Plantaginaceae)

Soil nitrogen availability and herbivore attack influence the chemical defenses of an invasive plant (Linaria dalmatica; Plantaginaceae)

Is there rapid evolutionary response in introduced populations of tansy ragwort, Jacobaea vulgaris, when exposed to biological control?

A Novel 2-Oxoacid-Dependent Dioxygenase Involved in the Formation of the Goiterogenic 2-Hydroxybut-3-enyl Glucosinolate and Generalist Insect Resistance in Arabidopsis

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