Diversity of pyrrolizidine alkaloids in native and invasive Senecio pterophorus (Asteraceae): Implications for toxicity

Castells, Eva; Mulder, Patrick P.J.; Pérez‐Trujillo, Míriam

doi:10.1016/j.phytochem.2014.09.006

Cited by 36 publications

(30 citation statements)

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“…Our results supported the findings by Joshi & Vrieling (2005) and Lin (2015) that the native J. vulgaris plants expressed more diversity of PA than the native ones (Joshi & Vrieling 2005;Lin 2015). Castells et al (2014) also found that diversity of PA in S. pterophorus (from South Africa) reduced after invasion (Castells et al, 2014). However, the results do not support our prediction and the prediction of the SDH that the invasive plants produce more diverse of PAs than the native ones.…”

Section: Discussioncontrasting

confidence: 79%

“…They compared PA variation between native and invasive plants and reported that the PA levels significantly increased in the invaded area (Doorduin & Vrieling 2011;Wolf et al 2011). For example, invasive populations of S. inaequidens, S. pterophorus (Cano et al 2009), S. pterophorus (Castells et al 2014) and S. jacobaea (Joshi & Vrieling 2005;Stastny et al, 2005;Lin 2015) showed significantly higher total PA concentration than their native populations.…”

Section: Discussionmentioning

confidence: 99%

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Variation of pyrrolizidine alkaloids in Senecio vulgaris plants from native and invasive ranges

Cheng

Nguyen

Ndihokubwayo

et al. 2016

Preprint

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Pyrrolizidine alkaloids (PAs), a typical kind of secondary metabolites in plants, have important roles on defense against herbivores and pathogens; however, specialist herbivores adapted to PAs can use them as cues for oviposition and feeding. Thus, in the native ranges, PA diversity and concentration in plants were selected by the balance between pressure from generalist and specialist herbivores. In introduced ranges, where the specialist herbivores are absent, the introduced plants could increase concentration and diversity of PAs. This predication is deduced from the Shift Defense Hypothesis (SDH). In this research, we investigated whether there were any differences between native and invasive Senecio vulgaris plants (from Europe and China, respectively) with regards to the PA composition and concentration. We grew the native and invasive S. vulgaris plants in an identical condition and harvested them when they started to bloom. Their roots and shoots were separately harvested and dried. PA composition and concentration from powder of the shoots and roots were detected by using liquid chromatography -tanderm mass spectrometry (LC-MS/MS). We identified 14 PAs which belongs to the structural group senecionine -like PAs. Most of them occurred in both the native and invasive S. vulgaris plants, except the usaramine N -oxide that was only found in the native ones. From the 14 PAs identified, only riddelliine N -oxide had significantly higher present frequency in the invasive plants than in the native plants. The invasive S. vulgaris plants had significantly lower concentration of 3 individual PAs (seneciphylline N -oxide, spartioidine and spartioidine N -oxide) than the native ones. These results demonstrated that PA diversity and concentration of some individual PAs tended to reduce in the invasive range of S. vulgaris. This is contrary to the predictions of the SDH that the invasive plants would produce more qualitative defense than the native ones, and it is probably an evidence that a little trade -off between defense and growth happened to the S. vulgaris in China.

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Section: Discussioncontrasting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Variation of pyrrolizidine alkaloids in Senecio vulgaris plants from native and invasive ranges

Cheng

Nguyen

Ndihokubwayo

et al. 2016

Preprint

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“…Recent studies show that S. pterophorus from the non-native populations have genetically determined plant traits, including reproductive capacity, biomass, leaf morphology and chemical composition, that are different compared with the native populations, which is consistent with rapid evolution postinvasion (Castells et al 2014b;Colomer-Ventura et al 2015).…”

Section: Introductionmentioning

confidence: 71%

“…The high percentage of germination (around 80%) is favored by a mucilaginous coat segregated by the achenal hairs that increases the area of seed-water contact (Lawrence 1985). Similar to other species in the genus, S. pterophorus produces pyrrolizidine alkaloids, which are toxic compounds for defense against vertebrate and invertebrate herbivores (Kirk et al 2004;Castells et al 2014b).…”

Section: Study Species and Invasion Historymentioning

confidence: 99%

The invasion of Senecio pterophorus across continents: multiple, independent introductions, admixture and hybridization

et al. 2016

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“…In addition, changes in chemical defences after invasion are an important aspect of the EICA hypothesis that has not been covered in our study. We cannot reject that chemical defences of S. pterophorus , such as pyrrolizidine alkaloids (Castells, Mulder & Pérez‐Trujillo ), are evolving in response to herbivory independently from morphological traits.…”

Section: Discussionmentioning

confidence: 94%

Contemporary evolution of an invasive plant is associated with climate but not with herbivory

et al. 2015

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Summary Divergence in plant traits and trait plasticity after invasion has been proposed as mechanisms favouring invasion success. Current hypotheses predict a rapid evolution in response to changes in the abiotic conditions in the area of introduction or to differences in the herbivore consumption pressure caused by a decrease in the enemies associated with the area of origin [e.g. evolution of increased competitive ability (EICA) hypothesis]. The importance of these factors in determining plant geographical divergence has not been yet simultaneously evaluated. Senecio pterophorus (Asteraceae) is a perennial shrub native to eastern South Africa and a recent invader in western South Africa (since ˜100 years ago), Australia (>70–100 years) and Europe (>30 years). These areas differ in their summer drought stress [measured as the ratio of summer precipitation to potential evapotranspiration (P/PET)] and their interactions with herbivores. We performed a common garden experiment with S. pterophorus sampled throughout its entire known distributional area to determine (i) whether native and non‐native populations diverge in their traits, as well as the plasticity of these traits in response to water availability and (ii) whether climate and herbivory play a role in the genetic differentiation across regions. Plants from the non‐native regions were smaller and had a lower reproductive output than plants from the indigenous area. No geographical differences in phenotypic plasticity were found in response to water availability. Herbivory was not related to the plant geographical divergence. In contrast, our results are consistent with the role of climate as a driver for postinvasive evolution, as suggested by adaptation of plants to a drought cline in the native range, the analogous change in plant traits in independently invaded regions and the convergence of vegetative traits between non‐native plants and native plants under similar drought conditions. Native and non‐native populations of S. pterophorus differed in plant traits, but not in trait plasticity, in response to their local climatic conditions. Our results are contrary to the role of herbivory as a selective factor after invasion and highlight the importance of climate driving rapid evolution of exotic plants.

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Diversity of pyrrolizidine alkaloids in native and invasive Senecio pterophorus (Asteraceae): Implications for toxicity

Cited by 36 publications

References 50 publications

Variation of pyrrolizidine alkaloids in Senecio vulgaris plants from native and invasive ranges

Variation of pyrrolizidine alkaloids in Senecio vulgaris plants from native and invasive ranges

The invasion of Senecio pterophorus across continents: multiple, independent introductions, admixture and hybridization

Contemporary evolution of an invasive plant is associated with climate but not with herbivory

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