Domestication impacts on plant-herbivore interactions: a meta-analysis.
Philos Trans R Soc Lond B Biol Sci
; 372(1712)2017 01 19.
Article
en En
| MEDLINE
| ID: mdl-27920379
ABSTRACT
For millennia, humans have imposed strong selection on domesticated crops, resulting in drastically altered crop phenotypes compared with wild ancestors. Crop yields have increased, but a long-held hypothesis is that domestication has also unintentionally decreased plant defences against herbivores. To test this hypothesis, we conducted a phylogenetically controlled meta-analysis comparing insect herbivore resistance and putative plant defence traits between crops and their wild relatives. Our database included 2098 comparisons made across 73 crops in 89 studies. We found that domestication consistently reduced plant resistance to herbivores, although the magnitude of the effects varied across plant organs and depended on how resistance was measured. However, domestication had no consistent effects on the specific plant defence traits underlying resistance, including secondary metabolites and physical feeding barriers. The values of these traits sometimes increased and sometimes decreased during domestication. Consistent negative effects of domestication were observed only when defence traits were measured in reproductive organs or in the plant organ that was harvested. These results highlight the complexity of evolution under domestication and the need for an improved theoretical understanding of the mechanisms through which agronomic selection can influence the species interactions that impact both the yield and sustainability of our food systems.This article is part of the themed issue 'Human influences on evolution, and the ecological and societal consequences'.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Productos Agrícolas
/
Evolución Biológica
/
Herbivoria
/
Domesticación
/
Insectos
/
Antibiosis
Tipo de estudio:
Systematic_reviews
Límite:
Animals
Idioma:
En
Revista:
Philos Trans R Soc Lond B Biol Sci
Año:
2017
Tipo del documento:
Article
País de afiliación:
Estados Unidos