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Trade-Offs between Silicon and Phenolic Defenses may Explain Enhanced Performance of Root Herbivores on Phenolic-Rich Plants

Phenolic compounds play a role in plant defense against herbivores. For some herbivorous insects, particularly root herbivores, host plants with high phenolic concentrations promote insect performance and tissue consumption. This positive relationship between some insects and phenolics, however, cou... Full description

Journal Title: Journal of chemical ecology 2016-08-01, Vol.42 (8), p.768-771
Main Author: Frew, Adam
Other Authors: Powell, Jeff R , Sallam, Nader , Allsopp, Peter G , Johnson, Scott N
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: New York: Springer US
ID: ISSN: 0098-0331
Link: https://www.ncbi.nlm.nih.gov/pubmed/27481346
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recordid: cdi_proquest_miscellaneous_1826739316
title: Trade-Offs between Silicon and Phenolic Defenses may Explain Enhanced Performance of Root Herbivores on Phenolic-Rich Plants
format: Article
creator:
  • Frew, Adam
  • Powell, Jeff R
  • Sallam, Nader
  • Allsopp, Peter G
  • Johnson, Scott N
subjects:
  • Agriculture
  • Animals
  • Biochemistry
  • Biological Microscopy
  • Biomedical and Life Sciences
  • Carbon
  • Coleoptera - drug effects
  • Ecology
  • Entomology
  • Female
  • general
  • Herbivores
  • Herbivory - drug effects
  • Insects
  • Life Sciences
  • Male
  • Phenology
  • Phenols - metabolism
  • Phenols - pharmacology
  • Plant Roots - metabolism
  • Plants
  • Rapid Communication
  • Saccharum - metabolism
  • Saccharum - physiology
  • Silicon
  • Silicon - metabolism
  • Silicon - pharmacology
  • Sugarcane
ispartof: Journal of chemical ecology, 2016-08-01, Vol.42 (8), p.768-771
description: Phenolic compounds play a role in plant defense against herbivores. For some herbivorous insects, particularly root herbivores, host plants with high phenolic concentrations promote insect performance and tissue consumption. This positive relationship between some insects and phenolics, however, could reflect a negative correlation with other plant defenses acting against insects. Silicon is an important element for plant growth and defense, particularly in grasses, as many grass species take up large amounts of silicon. Negative impact of a high silicon diet on insect herbivore performance has been reported aboveground, but is unreported for belowground herbivores. It has been hypothesized that some silicon accumulating plants exhibit a trade-off between carbon-based defense compounds, such as phenolics, and silicon-based defenses. Here, we investigated the impact of silicon concentrations and total phenolic concentrations in sugarcane roots on the performance of the root-feeding greyback canegrub ( Dermolepida albohirtum ). Canegrub performance was positively correlated with root phenolics, but negatively correlated with root silicon. We found a negative relationship in the roots between total phenolics and silicon concentrations. This suggests the positive impact of phenolic compounds on some insects may be the effect of lower concentrations of silicon compounds in plant tissue. This is the first demonstration of plant silicon negatively affecting a belowground herbivore.
language: eng
source:
identifier: ISSN: 0098-0331
fulltext: no_fulltext
issn:
  • 0098-0331
  • 1573-1561
url: Link


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titleTrade-Offs between Silicon and Phenolic Defenses may Explain Enhanced Performance of Root Herbivores on Phenolic-Rich Plants
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descriptionPhenolic compounds play a role in plant defense against herbivores. For some herbivorous insects, particularly root herbivores, host plants with high phenolic concentrations promote insect performance and tissue consumption. This positive relationship between some insects and phenolics, however, could reflect a negative correlation with other plant defenses acting against insects. Silicon is an important element for plant growth and defense, particularly in grasses, as many grass species take up large amounts of silicon. Negative impact of a high silicon diet on insect herbivore performance has been reported aboveground, but is unreported for belowground herbivores. It has been hypothesized that some silicon accumulating plants exhibit a trade-off between carbon-based defense compounds, such as phenolics, and silicon-based defenses. Here, we investigated the impact of silicon concentrations and total phenolic concentrations in sugarcane roots on the performance of the root-feeding greyback canegrub ( Dermolepida albohirtum ). Canegrub performance was positively correlated with root phenolics, but negatively correlated with root silicon. We found a negative relationship in the roots between total phenolics and silicon concentrations. This suggests the positive impact of phenolic compounds on some insects may be the effect of lower concentrations of silicon compounds in plant tissue. This is the first demonstration of plant silicon negatively affecting a belowground herbivore.
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subjectAgriculture ; Animals ; Biochemistry ; Biological Microscopy ; Biomedical and Life Sciences ; Carbon ; Coleoptera - drug effects ; Ecology ; Entomology ; Female ; general ; Herbivores ; Herbivory - drug effects ; Insects ; Life Sciences ; Male ; Phenology ; Phenols - metabolism ; Phenols - pharmacology ; Plant Roots - metabolism ; Plants ; Rapid Communication ; Saccharum - metabolism ; Saccharum - physiology ; Silicon ; Silicon - metabolism ; Silicon - pharmacology ; Sugarcane
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descriptionPhenolic compounds play a role in plant defense against herbivores. For some herbivorous insects, particularly root herbivores, host plants with high phenolic concentrations promote insect performance and tissue consumption. This positive relationship between some insects and phenolics, however, could reflect a negative correlation with other plant defenses acting against insects. Silicon is an important element for plant growth and defense, particularly in grasses, as many grass species take up large amounts of silicon. Negative impact of a high silicon diet on insect herbivore performance has been reported aboveground, but is unreported for belowground herbivores. It has been hypothesized that some silicon accumulating plants exhibit a trade-off between carbon-based defense compounds, such as phenolics, and silicon-based defenses. Here, we investigated the impact of silicon concentrations and total phenolic concentrations in sugarcane roots on the performance of the root-feeding greyback canegrub ( Dermolepida albohirtum ). Canegrub performance was positively correlated with root phenolics, but negatively correlated with root silicon. We found a negative relationship in the roots between total phenolics and silicon concentrations. This suggests the positive impact of phenolic compounds on some insects may be the effect of lower concentrations of silicon compounds in plant tissue. This is the first demonstration of plant silicon negatively affecting a belowground herbivore.
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abstractPhenolic compounds play a role in plant defense against herbivores. For some herbivorous insects, particularly root herbivores, host plants with high phenolic concentrations promote insect performance and tissue consumption. This positive relationship between some insects and phenolics, however, could reflect a negative correlation with other plant defenses acting against insects. Silicon is an important element for plant growth and defense, particularly in grasses, as many grass species take up large amounts of silicon. Negative impact of a high silicon diet on insect herbivore performance has been reported aboveground, but is unreported for belowground herbivores. It has been hypothesized that some silicon accumulating plants exhibit a trade-off between carbon-based defense compounds, such as phenolics, and silicon-based defenses. Here, we investigated the impact of silicon concentrations and total phenolic concentrations in sugarcane roots on the performance of the root-feeding greyback canegrub ( Dermolepida albohirtum ). Canegrub performance was positively correlated with root phenolics, but negatively correlated with root silicon. We found a negative relationship in the roots between total phenolics and silicon concentrations. This suggests the positive impact of phenolic compounds on some insects may be the effect of lower concentrations of silicon compounds in plant tissue. This is the first demonstration of plant silicon negatively affecting a belowground herbivore.
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pmid27481346
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orcididhttps://orcid.org/0000-0001-9859-2419