Insect herbivory stimulates allelopathic exudation by an invasive plant and the suppression of natives

Thelen, Giles C.; Vivanco, Jorge M.; Newingham, Beth A.; Good, William R.; Bais, Harsh P.; Landres, Peter; Caesar, A. J.; Callaway, Ragan M.

doi:10.1111/j.1461-0248.2004.00713.x

Cited by 133 publications

(125 citation statements)

References 55 publications

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“…Insect herbivory on goldenrods can promote plant species richness and coexistence, primarily by augmenting light availability to suppressed understory species but also by increasing soil moisture and nitrogen levels in the soil (Carson and Root, 2000;Long et al, 2003). However, herbivory may stimulate the production of allelochemicals (Thelen et al, 2005;Abhilasha et al, 2008), potentially mitigating these effects.…”

Section: Discussionmentioning

confidence: 99%

Allelopathic Effects of Goldenrod Species on Turnover in Successional Communities

Pisula

Meiners²

2010

The American Midland Naturalist

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ABSTRACT.-While goldenrod species are often found to be allelopathic in laboratory settings, its importance in controlling plant community dynamics has been much more difficult to assess. We designed a study to determine whether allelopathy is related to the success of goldenrods in abandoned agricultural land. To accomplish this, we conducted laboratory bioassays for six co-occurring goldenrod species and compared these results to the cover and impacts of these species in the field. We determined the germination responses of two target species to a gradient of leaf extract concentrations to assess the allelopathic potential of these goldenrods. We also used long-term successional data to determine the influence of each goldenrod species on community turnover. Germination percentages in the lab were reduced by leaf extracts for most goldenrod species and varied dramatically among species. In the field, influences of goldenrods on their associated communities were weak and opposite expected allelopathic effects, as the number of associated species generally increased with goldenrod cover. The relative strength of allelopathy among goldenrods was not related to the abundance achieved during succession. In this system, we documented the potential for goldenrods to exhibit allelopathic interactions in a controlled situation. However, these effects were not strong enough to alter community structure and turnover.

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Section: Discussionmentioning

confidence: 99%

Allelopathic Effects of Goldenrod Species on Turnover in Successional Communities

Pisula

Meiners²

2010

The American Midland Naturalist

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“…Since chemical exchange between plant neighbours can potentially occur in any habitat, increased understanding of the consequences of allelopathy and related processes not just for plants but for insects could be valuable for fields as varied as biodiversity, invasion biology and sustainable crop production. A) Herbivory influences production of allelopathic substances (Thelen et al, 2005;Kong et al, 2002). B) Chemical inducers enhance production of allelopathic substances (Bi et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…For example, herbivory has been shown to influence a plant's allelopathic potential. Root herbivory on the invasive plant Centaurea maculosa increased exudation of the flavanol (±)-catechin, an allelopathic agent that negatively affects other plant species (Thelen et al, 2005). However, herbivory by a phloem-feeding aphid reduced the allelopathic activity of the weed Ageratum conyzoides (Kong et al, 2002).…”

Section: Linking Allelopathy and Plant-insect Interactionmentioning

confidence: 99%

Chemical interaction between undamaged plants – Effects on herbivores and natural enemies

2011

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Most research on plant-plant chemical interactions has focussed on events following herbivore or pathogen attack. However, undamaged plants also interact chemically as a natural facet of their behaviour, and this may have consequences for insects that use the plants as hosts. In this review, the links between allelopathy and insect behaviour are outlined.Findings on how chemical interactions between different plant species and genotypes affect aphid herbivores and their natural enemies are reviewed, and the role of plant diversity and chemical interaction for trophic interactions in crops is discussed.

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“…Apart from the obvious undesired outcome of being ineVective, weed biocontrol agents may actually enhance weed Wtness through inadequate herbivory or other ecological activities. Examples of herbivore-associated undesired impacts to weed species targeted for biological control may include: tolerance of herbivory (Strauss and Agrawal, 1999); compensatory growth responses to herbivory (Trumble et al, 1993); facilitation of sexual reproduction through pollination (Barthell et al, 2001;Goulson and Derwent, 2004); production of allelopathic exudates in response to herbivory (Callaway et al, 1999;Thelen et al, 2005); and semiochemical signaling to herbivore natural enemies (Paré and Tumlinson, 1999).…”

Section: Introductionmentioning

confidence: 99%

A retrospective analysis of known and potential risks associated with exotic toadflax-feeding insects

Sing¹,

Peterson²,

Weaver³

et al. 2005

Biological Control

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Hansen, Richard W.; and Markin, George P., "A retrospective analysis of known and potential risks associated with exotic toadflax-feeding insects" (2005 AbstractTo date, eight exotic toadXax-feeding insect species have been accidentally or intentionally introduced to North America. Reports on their establishment and impact have been recorded for more than 60 years. Environmental risks linked to biological control of toadXax were identiWed in terms of host resources and undesirable impacts on the target species through the critical review of this record. Data gaps revealed during this retrospective analysis are addressed through suggestions for future research and associated experimental methodologies. Known and potential impacts of toadXax-feeding insects on both invasive toadXax and non-target species are examined. Recent programmatic demands for demonstrated agent eYcacy and stringent host selectivity during the prerelease screening process clearly illustrate that classical biological control of invasive toadXax in North America is progressing beyond the so-called lottery approach. 

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Insect herbivory stimulates allelopathic exudation by an invasive plant and the suppression of natives

Cited by 133 publications

References 55 publications

Allelopathic Effects of Goldenrod Species on Turnover in Successional Communities

Allelopathic Effects of Goldenrod Species on Turnover in Successional Communities

Chemical interaction between undamaged plants – Effects on herbivores and natural enemies

A retrospective analysis of known and potential risks associated with exotic toadflax-feeding insects

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