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Constitutive foliar metabolite variation in conifers shapes their susceptibility to the invasive herbivore Lymantria dispar asiatica.

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Title: Constitutive foliar metabolite variation in conifers shapes their susceptibility to the invasive herbivore Lymantria dispar asiatica.
Authors: Cui, Mingming1,2,3 (AUTHOR), Iyiola, Ebenezer A.1,2,3 (AUTHOR), Chen, Chen1,2,3 (AUTHOR), Hammerbacher, Almuth4 (AUTHOR), Audet, Pierre5 (AUTHOR), Blackburn, Gwylim S.1,2,3 (AUTHOR), Keeling, Christopher I.6,7 (AUTHOR), Stoehr, Michael8 (AUTHOR), Bird, Keith8 (AUTHOR), Degner, Jonathan8 (AUTHOR), El-Kassaby, Yousry A.9 (AUTHOR), Bernier, Louis1,2,3 (AUTHOR), Keena, Melody10 (AUTHOR), Porth, Ilga M.1,2,3 (AUTHOR) ilga.porth@sbf.ulaval.ca
Source: Canadian Journal of Forest Research. 5/28/2026, Vol. 56, p1-17. 17p.
Subject Terms: *Tree breeding, *Terpenes, *Forest insects, *Phenols, *Introduced animals, Plant metabolites, Conifers, Lymantria dispar
Abstract: Forest ecosystems are increasingly threatened by invasive pests due to global trade and changing environmental conditions. Improving tree resilience through selective breeding represents an effective management strategy. We used a combination of Lymantria dispar asiatica insect rearing, host metabolomic profiling, and full-sib family effect parameter evaluation of metabolites to identify defenses with greatest genetic potential. Among conifers studied for larval development, coastal Douglas-fir was the most and Norway spruce the least favorable host. Phenolics in foliage grouped conifer species phylogenetically, whereas terpenes reflected feeding behavior of the larvae better. Analysis of Douglas-fir full-sib families revealed moderate to high family effects of phytochemicals, suggesting potential for direct improvement of resistance. However, terpene profiles of nursery versus field grown Douglas-fir and Norway spruce were highly dissimilar, illustrating environmental and ontogenetic variability of biochemical traits. Insect bioassays thus need to be directly linked to terpene profiles of tested trees and data cannot be extrapolated to the species level. This integrated framework proposes a way for identifying targeted defenses and assessing their genetic potential, supporting evidence-based strategies for developing pest-resistant forest trees under increasing biological invasions. Follow-up work is needed to enhance phenotyping capacities of targeted resistance traits and obtain breeding values for these. [ABSTRACT FROM AUTHOR]
Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Header DbId: 8gh
DbLabel: GreenFILE
An: 194052089
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PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Constitutive foliar metabolite variation in conifers shapes their susceptibility to the invasive herbivore Lymantria dispar asiatica.
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  Data: <searchLink fieldCode="AR" term="%22Cui%2C+Mingming%22">Cui, Mingming</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Iyiola%2C+Ebenezer+A%2E%22">Iyiola, Ebenezer A.</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Chen%22">Chen, Chen</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hammerbacher%2C+Almuth%22">Hammerbacher, Almuth</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Audet%2C+Pierre%22">Audet, Pierre</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Blackburn%2C+Gwylim+S%2E%22">Blackburn, Gwylim S.</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Keeling%2C+Christopher+I%2E%22">Keeling, Christopher I.</searchLink><relatesTo>6,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Stoehr%2C+Michael%22">Stoehr, Michael</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bird%2C+Keith%22">Bird, Keith</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Degner%2C+Jonathan%22">Degner, Jonathan</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22El-Kassaby%2C+Yousry+A%2E%22">El-Kassaby, Yousry A.</searchLink><relatesTo>9</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bernier%2C+Louis%22">Bernier, Louis</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Keena%2C+Melody%22">Keena, Melody</searchLink><relatesTo>10</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Porth%2C+Ilga+M%2E%22">Porth, Ilga M.</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> ilga.porth@sbf.ulaval.ca</i>
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  Data: <searchLink fieldCode="JN" term="%22Canadian+Journal+of+Forest+Research%22">Canadian Journal of Forest Research</searchLink>. 5/28/2026, Vol. 56, p1-17. 17p.
– Name: Subject
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  Data: *<searchLink fieldCode="DE" term="%22Tree+breeding%22">Tree breeding</searchLink><br />*<searchLink fieldCode="DE" term="%22Terpenes%22">Terpenes</searchLink><br />*<searchLink fieldCode="DE" term="%22Forest+insects%22">Forest insects</searchLink><br />*<searchLink fieldCode="DE" term="%22Phenols%22">Phenols</searchLink><br />*<searchLink fieldCode="DE" term="%22Introduced+animals%22">Introduced animals</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+metabolites%22">Plant metabolites</searchLink><br /><searchLink fieldCode="DE" term="%22Conifers%22">Conifers</searchLink><br /><searchLink fieldCode="DE" term="%22Lymantria+dispar%22">Lymantria dispar</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Forest ecosystems are increasingly threatened by invasive pests due to global trade and changing environmental conditions. Improving tree resilience through selective breeding represents an effective management strategy. We used a combination of Lymantria dispar asiatica insect rearing, host metabolomic profiling, and full-sib family effect parameter evaluation of metabolites to identify defenses with greatest genetic potential. Among conifers studied for larval development, coastal Douglas-fir was the most and Norway spruce the least favorable host. Phenolics in foliage grouped conifer species phylogenetically, whereas terpenes reflected feeding behavior of the larvae better. Analysis of Douglas-fir full-sib families revealed moderate to high family effects of phytochemicals, suggesting potential for direct improvement of resistance. However, terpene profiles of nursery versus field grown Douglas-fir and Norway spruce were highly dissimilar, illustrating environmental and ontogenetic variability of biochemical traits. Insect bioassays thus need to be directly linked to terpene profiles of tested trees and data cannot be extrapolated to the species level. This integrated framework proposes a way for identifying targeted defenses and assessing their genetic potential, supporting evidence-based strategies for developing pest-resistant forest trees under increasing biological invasions. Follow-up work is needed to enhance phenotyping capacities of targeted resistance traits and obtain breeding values for these. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1139/cjfr-2025-0348
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 1
    Subjects:
      – SubjectFull: Tree breeding
        Type: general
      – SubjectFull: Terpenes
        Type: general
      – SubjectFull: Forest insects
        Type: general
      – SubjectFull: Phenols
        Type: general
      – SubjectFull: Introduced animals
        Type: general
      – SubjectFull: Plant metabolites
        Type: general
      – SubjectFull: Conifers
        Type: general
      – SubjectFull: Lymantria dispar
        Type: general
    Titles:
      – TitleFull: Constitutive foliar metabolite variation in conifers shapes their susceptibility to the invasive herbivore Lymantria dispar asiatica.
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            – D: 28
              M: 05
              Text: 5/28/2026
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              Y: 2026
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