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Novel weapons: invasive plant suppresses fungal mutualists in America but not in its native Europe.
TLDR
The results indicate that phytochemicals, benign to resistant mycorrhizal symbionts in the home range, may be lethal to naïve native mutualists in the introduced range and indirectly suppress the plants that rely on them.
Salicylic acid inhibits jasmonic acid‐induced resistance of Arabidopsis thaliana to Spodoptera exigua
TLDR
SA attenuated the induction of glucosinolates by JA and therefore may explain better the interactive effects of SA and JA on insect performance, and is illustrated that direct and indirect cross‐effects of SA on resistance to S. exigua can occur in A. thaliana.
Phenolic Metabolites in Leaves of the Invasive Shrub, Lonicera maackii, and Their Potential Phytotoxic and Anti-Herbivore Effects
TLDR
Leaves of L. maackii contain phenolic compounds, including apigenin and chlorogenic acid, capable of having biological effects on other plants and insects, and these compounds were inhibitory to seed germination of Arabidopsis thaliana.
Leaf and root extracts of the invasive shrub, Lonicera maackii, inhibit seed germination of three herbs with no autotoxic effects
TLDR
This study explored the potential of aqueous extracts of the leaves and roots of this plant to inhibit seed germination of Impatiens capensis, Alliaria petiolata, Arabidopsis thaliana, and L. maackii in Petri dish bioassays and found that root and leaf extracts significantly decreased germination in the three herb species.
Comparative Phloem Chemistry of Manchurian (Fraxinus mandshurica) and Two North American Ash Species (Fraxinus americana and Fraxinus pennsylvanica)
TLDR
Analysis of the constitutive phloem chemistry of three ash species revealed the presence of an array of phenolic compounds including hydroxycoumarins, a monolignol, lignans, phenylethanoids, and secoiridoids that might represent a mechanism of resistance against EAB.
Microbes as Targets and Mediators of Allelopathy in Plants
TLDR
Interactions involving wild plants in natural systems are examined, using case studies of some of the world’s most notorious invasive plants, and examples where soil microbial communities have changed through time in response to allelopathic plants with known or potential effects on plant communities are provided.
Contrasting Effects of Allelochemicals from Two Invasive Plants on the Performance of a Nonmycorrhizal Plant
TLDR
While nutrient addition substantially improved the performance of Arabidopsis thaliana grown in field soils in pots in a growth room, addition of A. petiolata extracts to these soils had no significant independent or interactive effects on growth or reproduction, which revealed that effects of L. maackii were independent of allelopathic effects on mycorrhizae.
Evidence that the caterpillar salivary enzyme glucose oxidase provides herbivore offense in solanaceous plants.
TLDR
Evidence supports the assertion that GOX is the salivary factor responsible for the suppression of tobacco plant nicotine production by H. zea saliva.
Expression of Constitutive and Inducible Chemical Defenses in Native and Invasive Populations of Alliaria petiolata
TLDR
Aside from the tendency for invasive populations to have reduced constitutive glucosinolate levels coupled with increased inducibility, little support for the predictions of EICA was evident in the chemical defenses that were studied.
How novel are the chemical weapons of garlic mustard in North American forest understories?
TLDR
The phytochemical profile of Alliaria petiolata was distinct from those of four closely related and/or abundant Brassicaceaeous species native to North America, providing support for the Novel Weapons Hypothesis.
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