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240117s2024 xx |||||o 00| ||eng c |
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|a 10.1111/nph.19534
|2 doi
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|a eng
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|a Younkin, Gordon C
|e verfasserin
|4 aut
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|a Cardiac glycosides protect wormseed wallflower (Erysimum cheiranthoides) against some, but not all, glucosinolate-adapted herbivores
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 23.05.2024
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|a Date Revised 25.05.2024
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|a published: Print-Electronic
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|a UpdateOf: bioRxiv. 2023 Nov 21;:. - PMID 37790475
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|a Citation Status MEDLINE
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|a © 2024 The Authors New Phytologist © 2024 New Phytologist Foundation.
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|a The chemical arms race between plants and insects is foundational to the generation and maintenance of biological diversity. We asked how the evolution of a novel defensive compound in an already well-defended plant lineage impacts interactions with diverse herbivores. Erysimum cheiranthoides (Brassicaceae), which produces both ancestral glucosinolates and novel cardiac glycosides, served as a model. We analyzed gene expression to identify cardiac glycoside biosynthetic enzymes in E. cheiranthoides and characterized these enzymes via heterologous expression and CRISPR/Cas9 knockout. Using E. cheiranthoides cardiac glycoside-deficient lines, we conducted insect experiments in both the laboratory and field. EcCYP87A126 initiates cardiac glycoside biosynthesis via sterol side-chain cleavage, and EcCYP716A418 has a role in cardiac glycoside hydroxylation. In EcCYP87A126 knockout lines, cardiac glycoside production was eliminated. Laboratory experiments with these lines revealed that cardiac glycosides were highly effective defenses against two species of glucosinolate-tolerant specialist herbivores, but did not protect against all crucifer-feeding specialist herbivores in the field. Cardiac glycosides had lesser to no effect on two broad generalist herbivores. These results begin elucidation of the E. cheiranthoides cardiac glycoside biosynthetic pathway and demonstrate in vivo that cardiac glycoside production allows Erysimum to escape from some, but not all, specialist herbivores
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|a Journal Article
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|a Brassicaceae
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|a Brevicoryne brassicae
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|a Erysimum
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|a Pieris rapae
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|a cardiac glycoside
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|a evolution
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|a glucosinolate
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|a herbivory
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|a Glucosinolates
|2 NLM
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|a Cardiac Glycosides
|2 NLM
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|a Alani, Martin L
|e verfasserin
|4 aut
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|a Páez-Capador, Anamaría
|e verfasserin
|4 aut
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| 700 |
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|a Fischer, Hillary D
|e verfasserin
|4 aut
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|a Mirzaei, Mahdieh
|e verfasserin
|4 aut
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|a Hastings, Amy P
|e verfasserin
|4 aut
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|a Agrawal, Anurag A
|e verfasserin
|4 aut
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| 700 |
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|a Jander, Georg
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 242(2024), 6 vom: 12. Mai, Seite 2719-2733
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|g year:2024
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|g day:12
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|g pages:2719-2733
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|u http://dx.doi.org/10.1111/nph.19534
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