Low concentrations of fertilizer and herbicide alter plant growth and interactions with flower-visiting insects

Russo, Laura; Buckley, Yvonne M.; Hamilton, Hannah; Kavanagh, Mark; Stout, Jane C.

doi:10.1016/j.agee.2020.107141

Cited by 37 publications

(36 citation statements)

References 47 publications

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“…While it is unknown whether terpenoid biosynthesis is affected by glyphosate, many floral volatile blends consist of a mixture of volatiles, among which, PP-derived VOCs play a vital role in floral volatile blends, and are important signals for pollinators to find and identify forage plants [76] (Figure 2). A recent study provides the first evidence that the proportion of flower visitors to a mixture of perennial flowering plants, decreases following treatment of the soil and foliage with sublethal glyphosate doses [20]. The authors attribute the observed changes to alterations in the phenotypical appearance of the flowering plants, but possible changes in VOC emission may contribute to those results [18].…”

Section: Open Accessmentioning

confidence: 99%

“…These compounds are essential signals for attracting predatory and parasitic insects, (i.e., indirect plant defense), but they also play a role in attracting pollinators [18,19]. For example, pollinators were shown to be decreasingly attracted by flowering plants after treatment with sublethal glyphosate doses [20]. In addition to the vast literature on the direct effects of glyphosate residues on non-target organisms, we suggest that glyphosate residues can substantially alter plant biotic interactions, exclusively by disrupting the biosynthesis of phytochemicals essential for plant defense and signaling to beneficial insects.…”

Section: Glyphosate [N-(phosphonomethyl)mentioning

confidence: 99%

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Glyphosate-Modulated Biosynthesis Driving Plant Defense and Species Interactions

Fuchs

Saikkonen

Helander

2021

Trends in Plant Science

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Glyphosate has become the best-selling herbicide used in agriculture, horticulture, silviculture, and urban environments. It disrupts the shikimate metabolic pathway and thereby blocks the production of aromatic amino acids, which are the basis for several plant metabolites. Glyphosate residues are reported in soils from diverse environments, but the effects on plant physiology and consequences for species interactions are largely unknown. Here, we emphasize the complexity of these physiological processes, and argue that glyphosate residues modulate biosynthetic pathways, individually or interactively, which may affect interactions between plants and heterotrophic organisms. In this way, glyphosate residues can substantially interfere with plant resistance and the attraction of beneficial insects, both of which are essential elements in integrated pest management and healthy ecosystems. Glyphosate Residues Affect Plant Defense Compound Biosynthesis HighlightsResidues of glyphosate, a potent herbicide, are increasingly found in diverse environments.Glyphosate residues in soil alter plant physiological processes; however, their effects on plant defense strategies and subsequent species interactions are poorly understood.Glyphosate inhibition of the shikimate pathway affects plant defense-related phytohormones and the phenylpropanoid pathway, the basis for many phytoalexins.Glyphosate affects lipid peroxidation, which alters jasmonic acid levels and green leaf volatiles, in turn, important players mediating many trophic interactions and pollinator attraction.By changing the plant biochemistry, glyphosate residues in soil have the potential to alter plant interactions with herbivores and mutualistic organisms.

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Section: Open Accessmentioning

confidence: 99%

Section: Glyphosate [N-(phosphonomethyl)mentioning

confidence: 99%

Glyphosate-Modulated Biosynthesis Driving Plant Defense and Species Interactions

Fuchs

Saikkonen

Helander

2021

Trends in Plant Science

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“…Pollinators can be influenced by the intensive use of chemicals in crops in direct and indirect ways (Russo et al, 2020). The use of chemical pesticides (also called synthetic pesticides, i.e.…”

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confidence: 99%

Shade trees and agrochemical use affect butterfly assemblages in coffee home gardens

Campera

Balestri

Manson

et al. 2021

Agriculture, Ecosystems & Environment

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“…However, no effects were observed on adult butterflies [ 61 ]. Experimental trials show that plants exposed to sublethal doses of glyphosate flowered at shorter heights and produced shorter leaves, while the size of the floral display had the largest effect on insect visitation, with larger floral displays significantly more likely to receive a visitor in a given sampling event [ 62 ].…”

Section: Indirect Effects In Terrestrial Ecosystemsmentioning

confidence: 99%

Indirect Effect of Pesticides on Insects and Other Arthropods

Sánchez‐Bayo

2021

Toxics

139

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Pesticides released to the environment can indirectly affect target and non-target species in ways that are often contrary to their intended use. Such indirect effects are mediated through direct impacts on other species or the physical environment and depend on ecological mechanisms and species interactions. Typical mechanisms are the release of herbivores from predation and release from competition among species with similar niches. Application of insecticides to agriculture often results in subsequent pest outbreaks due to the elimination of natural enemies. The loss of floristic diversity and food resources that result from herbicide applications can reduce populations of pollinators and natural enemies of crop pests. In aquatic ecosystems, insecticides and fungicides often induce algae blooms as the chemicals reduce grazing by zooplankton and benthic herbivores. Increases in periphyton biomass typically result in the replacement of arthropods with more tolerant species such as snails, worms and tadpoles. Fungicides and systemic insecticides also reduce nutrient recycling by impairing the ability of detritivorous arthropods. Residues of herbicides can reduce the biomass of macrophytes in ponds and wetlands, indirectly affecting the protection and breeding of predatory insects in that environment. The direct impacts of pesticides in the environment are therefore either amplified or compensated by their indirect effects.

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Low concentrations of fertilizer and herbicide alter plant growth and interactions with flower-visiting insects

Cited by 37 publications

References 47 publications

Glyphosate-Modulated Biosynthesis Driving Plant Defense and Species Interactions

Glyphosate-Modulated Biosynthesis Driving Plant Defense and Species Interactions

Shade trees and agrochemical use affect butterfly assemblages in coffee home gardens

Indirect Effect of Pesticides on Insects and Other Arthropods

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