Negative effects of an allelopathic invader on AM fungal plant species drive community‐level responses

Roche, Morgan D.; Pearse, Ian S.; Bialic‐Murphy, Lalasia; Kivlin, Stephanie N.; Sofaer, Helen R.; Kalisz, Susan

doi:10.1002/ecy.3201

Cited by 18 publications

(21 citation statements)

References 73 publications

(119 reference statements)

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“…The overall fungal community and AMF were both significantly changed by concentrations of GSLs in roots of Alliaria petiolata [ 211 ]. The allelopathic effects only affected mycorrhizal plant communities in a manipulative 11-year field experiment [ 212 ]. The Alliaria petiolata amendments have effects similar to that found in case of fungicide application according to [ 213 ].…”

Section: Biofumigation Inhibition Of Plant Pathogenesismentioning

confidence: 99%

Effects of Glucosinolate-Derived Isothiocyanates on Fungi: A Comprehensive Review on Direct Effects, Mechanisms, Structure-Activity Relationship Data and Possible Agricultural Applications

Plaszkó

Szűcs

Vasas

et al. 2021

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Plants heavily rely on chemical defense systems against a variety of stressors. The glucosinolates in the Brassicaceae and some allies are the core molecules of one of the most researched such pathways. These natural products are enzymatically converted into isothiocyanates (ITCs) and occasionally other defensive volatile organic constituents (VOCs) upon fungal challenge or tissue disruption to protect the host against the stressor. The current review provides a comprehensive insight on the effects of the isothiocyanates on fungi, including, but not limited to mycorrhizal fungi and pathogens of Brassicaceae. In the review, our current knowledge on the following topics are summarized: direct antifungal activity and the proposed mechanisms of antifungal action, QSAR (quantitative structure-activity relationships), synergistic activity of ITCs with other agents, effects of ITCs on soil microbial composition and allelopathic activity. A detailed insight into the possible applications is also provided: the literature of biofumigation studies, inhibition of post-harvest pathogenesis and protection of various products including grains and fruits is also reviewed herein.

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Section: Biofumigation Inhibition Of Plant Pathogenesismentioning

confidence: 99%

Effects of Glucosinolate-Derived Isothiocyanates on Fungi: A Comprehensive Review on Direct Effects, Mechanisms, Structure-Activity Relationship Data and Possible Agricultural Applications

Plaszkó

Szűcs

Vasas

et al. 2021

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“…Our previous work demonstrated that Alliaria can have cascading negative effects on the performance and population growth rate of AM dependent understory plant species 43 . We also previously found that Alliaria alters the diversity of native plant communities by reducing the abundance of mycorrhizal plant species, with no subsequent changes in non-mycorrhizal plant species 53 . In support of the mutualism disruption hypothesis, our previous findings suggest Alliaria negatively affects the population-and community-level dynamics of native species through the disruption of plant-microbial interactions.…”

Section: Non-native Invadermentioning

confidence: 62%

“…The right side of each plot was left at ambient Alliaria field densities, which averaged 15.2% cover (Roche et al . 2020). This experiment is a split‐plot design with two treatments per plot, referred hereafter as the weeded and ambient treatments.…”

Section: Methodsmentioning

confidence: 99%

“…Hand pulling and annual seedling removal was an effective method of invasion suppression, with a 0.08% mean abundance of Alliaria in the weeded plots (Roche et al . 2020).…”

Section: Methodsmentioning

confidence: 99%

“…We also previously found that Alliaria alters the diversity of native plant communities by reducing the abundance of mycorrhizal plant species, with no subsequent changes in non‐mycorrhizal plant species (Roche et al . 2020).…”

Section: Methodsmentioning

confidence: 99%

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Invasion‐induced root–fungal disruptions alter plant water and nitrogen economies

et al. 2021

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Despite widespread evidence that biological invasion influences the biotic and abiotic soil environments, the extent to which each of these pathways underpins the effects of invasion on native plant traits and performance is unknown. Leveraging a long-term (14-yr) manipulative field experiment, we show that an allelochemical-producing invader, Alliaria petiolata, affects native plants through biotic mechanisms, altering the soil fungal community composition, with no apparent shifts in soil nutrient availability. These changes in belowground soil fungal communities resulted in a high cost of resource uptake for native forest perennial herbs and a shift in functional traits linked to their carbon and nutrient economies. Furthermore, we illustrate that some species in the invaded community compensate for high nutrient costs by reducing nutrient uptake and maintaining photosynthesis by expending more water. This demonstrates a trade-off in trait investment that increases nutrient use efficiency as nutrient costs increase. Our results show that invasion-induced disruptions in the soil fungal community belowground can cascade to affect aboveground plant communities via shifts in physiological traits needed to maintain plant water and nutrient economies. These complex above-belowground linkages suggest that plant invasions should be evaluated at the system-level to fully understand and predict their impact on native plants and communities.

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