Seasonal and elevational variability in the induction of specialized compounds from mountain birch (Betula pubescens var. pumila) by winter moth larvae (Operophtera brumata)
The mountain birch [Betula pubescens var. pumila (L.)] forest in the Subarctic is periodically exposed to insect outbreaks, which are expected to intensify due to climate change. To mitigate abiotic and biotic stresses, plants have evolved chemical defenses, including volatile organic compounds (VOC...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8190950/ http://www.ncbi.nlm.nih.gov/pubmed/33601421 https://doi.org/10.1093/treephys/tpab023 |
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ftpubmed:oai:pubmedcentral.nih.gov:8190950 2023-05-15T18:28:19+02:00 Seasonal and elevational variability in the induction of specialized compounds from mountain birch (Betula pubescens var. pumila) by winter moth larvae (Operophtera brumata) Ryde, Ingvild Li, Tao Rieksta, Jolanta dos Santos, Bruna M Neilson, Elizabeth H J Gericke, Oliver Jepsen, Jane U Bork, Louise R H Holm, Hildur S Rinnan, Riikka 2021-02-18 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8190950/ http://www.ncbi.nlm.nih.gov/pubmed/33601421 https://doi.org/10.1093/treephys/tpab023 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8190950/ http://www.ncbi.nlm.nih.gov/pubmed/33601421 http://dx.doi.org/10.1093/treephys/tpab023 © The Author(s) 2021. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permission@oup.com. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) ), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com CC-BY-NC Tree Physiol Research Paper Text 2021 ftpubmed https://doi.org/10.1093/treephys/tpab023 2021-06-13T00:48:12Z The mountain birch [Betula pubescens var. pumila (L.)] forest in the Subarctic is periodically exposed to insect outbreaks, which are expected to intensify due to climate change. To mitigate abiotic and biotic stresses, plants have evolved chemical defenses, including volatile organic compounds (VOCs) and non-volatile specialized compounds (NVSCs). Constitutive and induced production of these compounds, however, are poorly studied in Subarctic populations of mountain birch. Here, we assessed the joint effects of insect herbivory, elevation and season on foliar VOC emissions and NVSC contents of mountain birch. The VOCs were sampled in situ by an enclosure technique and analyzed by gas chromatography–mass spectrometry. NVSCs were analyzed by liquid chromatography–mass spectrometry using an untargeted approach. At low elevation, experimental herbivory by winter moth larvae (Operophtera brumata) increased emissions of monoterpenes and homoterpenes over the 3-week feeding period, and sesquiterpenes and green leaf volatiles at the end of the feeding period. At high elevation, however, herbivory augmented only homoterpene emissions. The more pronounced herbivory effects at low elevation were likely due to higher herbivory intensity. Of the individual compounds, linalool, ocimene, 4,8-dimethylnona-1,3,7-triene, 2-methyl butanenitrile and benzyl nitrile were among the most responsive compounds in herbivory treatments. Herbivory also altered foliar NVSC profiles at both low and high elevations, with the most responsive compounds likely belonging to fatty acyl glycosides and terpene glycosides. Additionally, VOC emissions from non-infested branches were higher at high than low elevation, particularly during the early season, which was mainly driven by phenological differences. The VOC emissions varied substantially over the season, largely reflecting the seasonal variations in temperature and light levels. Our results suggest that if insect herbivory pressure continues to rise in the mountain birch forest with ongoing ... Text Subarctic PubMed Central (PMC) Tree Physiology 41 6 1019 1033 |
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Research Paper Ryde, Ingvild Li, Tao Rieksta, Jolanta dos Santos, Bruna M Neilson, Elizabeth H J Gericke, Oliver Jepsen, Jane U Bork, Louise R H Holm, Hildur S Rinnan, Riikka Seasonal and elevational variability in the induction of specialized compounds from mountain birch (Betula pubescens var. pumila) by winter moth larvae (Operophtera brumata) |
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Research Paper |
description |
The mountain birch [Betula pubescens var. pumila (L.)] forest in the Subarctic is periodically exposed to insect outbreaks, which are expected to intensify due to climate change. To mitigate abiotic and biotic stresses, plants have evolved chemical defenses, including volatile organic compounds (VOCs) and non-volatile specialized compounds (NVSCs). Constitutive and induced production of these compounds, however, are poorly studied in Subarctic populations of mountain birch. Here, we assessed the joint effects of insect herbivory, elevation and season on foliar VOC emissions and NVSC contents of mountain birch. The VOCs were sampled in situ by an enclosure technique and analyzed by gas chromatography–mass spectrometry. NVSCs were analyzed by liquid chromatography–mass spectrometry using an untargeted approach. At low elevation, experimental herbivory by winter moth larvae (Operophtera brumata) increased emissions of monoterpenes and homoterpenes over the 3-week feeding period, and sesquiterpenes and green leaf volatiles at the end of the feeding period. At high elevation, however, herbivory augmented only homoterpene emissions. The more pronounced herbivory effects at low elevation were likely due to higher herbivory intensity. Of the individual compounds, linalool, ocimene, 4,8-dimethylnona-1,3,7-triene, 2-methyl butanenitrile and benzyl nitrile were among the most responsive compounds in herbivory treatments. Herbivory also altered foliar NVSC profiles at both low and high elevations, with the most responsive compounds likely belonging to fatty acyl glycosides and terpene glycosides. Additionally, VOC emissions from non-infested branches were higher at high than low elevation, particularly during the early season, which was mainly driven by phenological differences. The VOC emissions varied substantially over the season, largely reflecting the seasonal variations in temperature and light levels. Our results suggest that if insect herbivory pressure continues to rise in the mountain birch forest with ongoing ... |
format |
Text |
author |
Ryde, Ingvild Li, Tao Rieksta, Jolanta dos Santos, Bruna M Neilson, Elizabeth H J Gericke, Oliver Jepsen, Jane U Bork, Louise R H Holm, Hildur S Rinnan, Riikka |
author_facet |
Ryde, Ingvild Li, Tao Rieksta, Jolanta dos Santos, Bruna M Neilson, Elizabeth H J Gericke, Oliver Jepsen, Jane U Bork, Louise R H Holm, Hildur S Rinnan, Riikka |
author_sort |
Ryde, Ingvild |
title |
Seasonal and elevational variability in the induction of specialized compounds from mountain birch (Betula pubescens var. pumila) by winter moth larvae (Operophtera brumata) |
title_short |
Seasonal and elevational variability in the induction of specialized compounds from mountain birch (Betula pubescens var. pumila) by winter moth larvae (Operophtera brumata) |
title_full |
Seasonal and elevational variability in the induction of specialized compounds from mountain birch (Betula pubescens var. pumila) by winter moth larvae (Operophtera brumata) |
title_fullStr |
Seasonal and elevational variability in the induction of specialized compounds from mountain birch (Betula pubescens var. pumila) by winter moth larvae (Operophtera brumata) |
title_full_unstemmed |
Seasonal and elevational variability in the induction of specialized compounds from mountain birch (Betula pubescens var. pumila) by winter moth larvae (Operophtera brumata) |
title_sort |
seasonal and elevational variability in the induction of specialized compounds from mountain birch (betula pubescens var. pumila) by winter moth larvae (operophtera brumata) |
publisher |
Oxford University Press |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8190950/ http://www.ncbi.nlm.nih.gov/pubmed/33601421 https://doi.org/10.1093/treephys/tpab023 |
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Subarctic |
genre_facet |
Subarctic |
op_source |
Tree Physiol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8190950/ http://www.ncbi.nlm.nih.gov/pubmed/33601421 http://dx.doi.org/10.1093/treephys/tpab023 |
op_rights |
© The Author(s) 2021. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permission@oup.com. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) ), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
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CC-BY-NC |
op_doi |
https://doi.org/10.1093/treephys/tpab023 |
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