Amplification of plant volatile defence against insect herbivory in a warming Arctic tundra
Plant-emitted volatile organic compounds (VOCs) play fundamental roles in atmospheric chemistry and ecological processes by contributing to aerosol formation1 and mediating species interactions2. Rising temperatures and the associated shifts in vegetation composition have been shown to be the primar...
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ftpubmed:oai:pubmedcentral.nih.gov:6561779 2023-05-15T14:49:18+02:00 Amplification of plant volatile defence against insect herbivory in a warming Arctic tundra Li, Tao Holst, Thomas Michelsen, Anders Rinnan, Riikka 2019-06-07 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6561779/ http://www.ncbi.nlm.nih.gov/pubmed/31182843 https://doi.org/10.1038/s41477-019-0439-3 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6561779/ http://www.ncbi.nlm.nih.gov/pubmed/31182843 http://dx.doi.org/10.1038/s41477-019-0439-3 http://www.nature.com/authors/editorial_policies/license.html#terms Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms Article Text 2019 ftpubmed https://doi.org/10.1038/s41477-019-0439-3 2019-12-15T01:13:34Z Plant-emitted volatile organic compounds (VOCs) play fundamental roles in atmospheric chemistry and ecological processes by contributing to aerosol formation1 and mediating species interactions2. Rising temperatures and the associated shifts in vegetation composition have been shown to be the primary drivers of plant VOC emissions in Arctic ecosystems3. Although herbivorous insects also strongly alter plant VOC emissions2, no studies have addressed the impact of herbivory on plant VOC emissions in the Arctic. Here, we show that warming dramatically increases the amount and alters the blend of VOCs released in response to herbivory. We observed that a tundra ecosystem subjected to warming, by open-top chambers, for 8 or 18 years showed a 4-fold increase in leaf area eaten by insect herbivores. Herbivory by autumnal moth (Epirrita autumnata) larvae and herbivory-mimicking methyl jasmonate application on the widespread circumpolar dwarf birch (Betula nana) both substantially increased emissions of terpenoids. The long-term warming treatments and mimicked herbivory caused, on average, a 2- and 4-fold increase in monoterpene emissions, respectively. When combined, emissions increased 11-fold, revealing a strong synergy between warming and herbivory. The synergistic effect was even more pronounced for homoterpene emissions. These findings suggest that in the rapidly warming Arctic, insect herbivory may be a primary determinant of VOC emissions during periods of active herbivore feeding. Text Arctic Betula nana Dwarf birch Tundra PubMed Central (PMC) Arctic Nature Plants 5 6 568 574 |
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Article Li, Tao Holst, Thomas Michelsen, Anders Rinnan, Riikka Amplification of plant volatile defence against insect herbivory in a warming Arctic tundra |
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Article |
description |
Plant-emitted volatile organic compounds (VOCs) play fundamental roles in atmospheric chemistry and ecological processes by contributing to aerosol formation1 and mediating species interactions2. Rising temperatures and the associated shifts in vegetation composition have been shown to be the primary drivers of plant VOC emissions in Arctic ecosystems3. Although herbivorous insects also strongly alter plant VOC emissions2, no studies have addressed the impact of herbivory on plant VOC emissions in the Arctic. Here, we show that warming dramatically increases the amount and alters the blend of VOCs released in response to herbivory. We observed that a tundra ecosystem subjected to warming, by open-top chambers, for 8 or 18 years showed a 4-fold increase in leaf area eaten by insect herbivores. Herbivory by autumnal moth (Epirrita autumnata) larvae and herbivory-mimicking methyl jasmonate application on the widespread circumpolar dwarf birch (Betula nana) both substantially increased emissions of terpenoids. The long-term warming treatments and mimicked herbivory caused, on average, a 2- and 4-fold increase in monoterpene emissions, respectively. When combined, emissions increased 11-fold, revealing a strong synergy between warming and herbivory. The synergistic effect was even more pronounced for homoterpene emissions. These findings suggest that in the rapidly warming Arctic, insect herbivory may be a primary determinant of VOC emissions during periods of active herbivore feeding. |
format |
Text |
author |
Li, Tao Holst, Thomas Michelsen, Anders Rinnan, Riikka |
author_facet |
Li, Tao Holst, Thomas Michelsen, Anders Rinnan, Riikka |
author_sort |
Li, Tao |
title |
Amplification of plant volatile defence against insect herbivory in a warming Arctic tundra |
title_short |
Amplification of plant volatile defence against insect herbivory in a warming Arctic tundra |
title_full |
Amplification of plant volatile defence against insect herbivory in a warming Arctic tundra |
title_fullStr |
Amplification of plant volatile defence against insect herbivory in a warming Arctic tundra |
title_full_unstemmed |
Amplification of plant volatile defence against insect herbivory in a warming Arctic tundra |
title_sort |
amplification of plant volatile defence against insect herbivory in a warming arctic tundra |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6561779/ http://www.ncbi.nlm.nih.gov/pubmed/31182843 https://doi.org/10.1038/s41477-019-0439-3 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Betula nana Dwarf birch Tundra |
genre_facet |
Arctic Betula nana Dwarf birch Tundra |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6561779/ http://www.ncbi.nlm.nih.gov/pubmed/31182843 http://dx.doi.org/10.1038/s41477-019-0439-3 |
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http://www.nature.com/authors/editorial_policies/license.html#terms Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms |
op_doi |
https://doi.org/10.1038/s41477-019-0439-3 |
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