Abstract
Abstract Lower plant resistance to herbivores following domestication has been suggested as the main cause for higher feeding damage in crops than in wild progenitors. While herbivore compensatory feeding has also been proposed as a possible mechanism for raised damage in crops with low nutritional quality, predictions regarding the effects of plant domestication on nutritional quality for herbivores remain unclear. In particular, data on primary metabolites, even major macronutrients, measured in the organs consumed by herbivores, are scarce. In this study, we used a collection of 10 accessions of wild ancestors and 10 accessions of modern progenies of Triticum turgidum to examine whether feeding damage and selectivity by nymphs of Locusta migratoria primarily depended on five leaf traits related to structural resistance or nutrient profiles. Our results unexpectedly showed that locusts favored wild ancestors over domesticated accessions and that leaf toughness and nitrogen and soluble protein contents increased with the domestication process. Furthermore, the quantitative relationship between soluble protein and digestible carbohydrates was found to poorly meet the specific requirements of the herbivore, in all wheat accessions, both wild and modern. The increase in leaf structural resistance to herbivores in domesticated tetraploid wheat accessions suggested that resource allocation trade‐offs between growth and herbivory resistance may have been disrupted by domestication in the vegetative organs of this species. Since domestication did not result in a loss of nutritional quality in the leaves of the tetraploid wheat, our results rather provides evidence for a role of the content of plants in nonnutritive nitrogenous secondary compounds, possibly deterrent or toxic, at least for grasshopper herbivores.
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Claims 7
Claim · model-written summary
Locusts favored wild ancestors over domesticated wheat accessions.
- Taxon
- Triticum turgidum
Triticum turgidume1 - Material
- wild ancestorse0
- Interactor
- Locusta migratoria
Locusta migratoriae2herbivore - Outcome
- locusts favored wild ancestorse0
- Comparator
- domesticated accessionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“locusts favored wild ancestors over domesticated accessions”
e1“Triticum turgidum”
e2“Locusta migratoria”
Claim · model-written summary
Leaf toughness increased with domestication.
- Taxon
- Triticum turgidumTriticum turgidume1
- Material
- domestication processe0
- Outcome
- leaf toughnesse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf toughness and nitrogen and soluble protein contents increased with the domestication process”
e1“Triticum turgidum”
Claim · model-written summary
Leaf nitrogen content increased with domestication.
- Taxon
- Triticum turgidumTriticum turgidume1
- Material
- domestication processe0
- Outcome
- nitrogene0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf toughness and nitrogen and soluble protein contents increased with the domestication process”
e1“Triticum turgidum”
Claim · model-written summary
Leaf soluble protein content increased with domestication.
- Taxon
- Triticum turgidumTriticum turgidume1
- Material
- domestication processe0
- Outcome
- soluble protein contentse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf toughness and nitrogen and soluble protein contents increased with the domestication process”
e1“Triticum turgidum”
Claim · model-written summary
The protein-to-digestible-carbohydrate relationship poorly met herbivore requirements across all accessions.
- Taxon
- Triticum turgidumTriticum turgidume1
- Interactor
- Locusta migratoriaLocusta migratoriae2herbivore
- Outcome
- quantitative relationship between soluble protein and digestible carbohydrates was found to poorly meet the specific requirements of the herbivoree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the quantitative relationship between soluble protein and digestible carbohydrates was found to poorly meet the specific requirements of the herbivore, in all wheat accessions, both wild and modern”
e1“Triticum turgidum”
e2“Locusta migratoria”
Claim · model-written summary
The authors inferred that domestication may have disrupted growth-resistance tradeoffs.
- Taxon
- Triticum turgidumTriticum turgidume1
- Outcome
- resource allocation trade‐offs between growth and herbivory resistancee0
- Qualifier
- may have been disrupted by domesticatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resource allocation trade‐offs between growth and herbivory resistance may have been disrupted by domestication”
e1“Triticum turgidum”
Claim · model-written summary
The authors inferred a possible role for nonnutritive nitrogenous secondary compounds in deterring or poisoning grasshopper herbivores.
- Taxon
- Triticum turgidumTriticum turgidume1
- Compound
- nonnutritive nitrogenous secondary compoundse0
- Outcome
- possibly deterrent or toxice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evidence for a role of the content of plants in nonnutritive nitrogenous secondary compounds, possibly deterrent or toxic, at least for grasshopper herbivores”
e1“Triticum turgidum”