Adaptive divergence in resistance to herbivores in Datura stramonium
Defensive traits exhibited by plants vary widely across populations. Heritable phenotypic differentiation is likely to be produced by genetic drift and spatially restricted gene flow between populations. However, spatially variable selection exerted by herbivores may also give rise to differences am...
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PeerJ Inc.
2015-11-01
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| author | Guillermo Castillo Pedro L. Valverde Laura L. Cruz Johnattan Hernández-Cumplido Guadalupe Andraca-Gómez Juan Fornoni Edson Sandoval-Castellanos Erika Olmedo-Vicente César M. Flores-Ortiz Juan Núñez-Farfán |
| author_facet | Guillermo Castillo Pedro L. Valverde Laura L. Cruz Johnattan Hernández-Cumplido Guadalupe Andraca-Gómez Juan Fornoni Edson Sandoval-Castellanos Erika Olmedo-Vicente César M. Flores-Ortiz Juan Núñez-Farfán |
| author_sort | Guillermo Castillo |
| collection | DOAJ |
| description | Defensive traits exhibited by plants vary widely across populations. Heritable phenotypic differentiation is likely to be produced by genetic drift and spatially restricted gene flow between populations. However, spatially variable selection exerted by herbivores may also give rise to differences among populations. To explore to what extent these factors promote the among-population differentiation of plant resistance of 13 populations of Datura stramonium, we compared the degree of phenotypic differentiation (PST) of leaf resistance traits (trichome density, atropine and scopolamine concentration) against neutral genetic differentiation (FST) at microsatellite loci. Results showed that phenotypic differentiation in defensive traits among-population is not consistent with divergence promoted by genetic drift and restricted gene flow alone. Phenotypic differentiation in scopolamine concentration was significantly higher than FST across the range of trait heritability values. In contrast, genetic differentiation in trichome density was different from FST only when heritability was very low. On the other hand, differentiation in atropine concentration differed from the neutral expectation when heritability was less than or equal to 0.3. In addition, we did not find a significant correlation between pair-wise neutral genetic distances and distances of phenotypic resistance traits. Our findings reinforce previous evidence that divergent natural selection exerted by herbivores has promoted the among-population phenotypic differentiation of defensive traits in D. stramonium. |
| first_indexed | 2024-03-09T05:15:49Z |
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| language | English |
| last_indexed | 2024-03-09T05:15:49Z |
| publishDate | 2015-11-01 |
| publisher | PeerJ Inc. |
| record_format | Article |
| series | PeerJ |
| spelling | doaj.art-4349964b667d402dafbbddb304e9c5222023-12-03T12:45:31ZengPeerJ Inc.PeerJ2167-83592015-11-013e141110.7717/peerj.1411Adaptive divergence in resistance to herbivores in Datura stramoniumGuillermo Castillo0Pedro L. Valverde1Laura L. Cruz2Johnattan Hernández-Cumplido3Guadalupe Andraca-Gómez4Juan Fornoni5Edson Sandoval-Castellanos6Erika Olmedo-Vicente7César M. Flores-Ortiz8Juan Núñez-Farfán9Department of Evolutionary Ecology, Institute for Ecology UNAM, Mexico Distrito Federal, MexicoDepartamento de Biología, Universidad Autónoma Metropolitana-Iztapalapa, Mexico Distrito Federal, MexicoDepartment of Evolutionary Ecology, Institute for Ecology UNAM, Mexico Distrito Federal, MexicoLaboratory of Evolutionary Entomology, Institute of Biology, University of Neuchâtel, Neuchâtel, SwitzerlandDepartment of Evolutionary Ecology, Institute for Ecology UNAM, Mexico Distrito Federal, MexicoDepartment of Evolutionary Ecology, Institute for Ecology UNAM, Mexico Distrito Federal, MexicoDepartment of Evolutionary Ecology, Institute for Ecology UNAM, Mexico Distrito Federal, MexicoDepartment of Evolutionary Ecology, Institute for Ecology UNAM, Mexico Distrito Federal, MexicoFacultad de Estudios Superiores Iztacala, UNAM, Estado de México, MexicoDepartment of Evolutionary Ecology, Institute for Ecology UNAM, Mexico Distrito Federal, MexicoDefensive traits exhibited by plants vary widely across populations. Heritable phenotypic differentiation is likely to be produced by genetic drift and spatially restricted gene flow between populations. However, spatially variable selection exerted by herbivores may also give rise to differences among populations. To explore to what extent these factors promote the among-population differentiation of plant resistance of 13 populations of Datura stramonium, we compared the degree of phenotypic differentiation (PST) of leaf resistance traits (trichome density, atropine and scopolamine concentration) against neutral genetic differentiation (FST) at microsatellite loci. Results showed that phenotypic differentiation in defensive traits among-population is not consistent with divergence promoted by genetic drift and restricted gene flow alone. Phenotypic differentiation in scopolamine concentration was significantly higher than FST across the range of trait heritability values. In contrast, genetic differentiation in trichome density was different from FST only when heritability was very low. On the other hand, differentiation in atropine concentration differed from the neutral expectation when heritability was less than or equal to 0.3. In addition, we did not find a significant correlation between pair-wise neutral genetic distances and distances of phenotypic resistance traits. Our findings reinforce previous evidence that divergent natural selection exerted by herbivores has promoted the among-population phenotypic differentiation of defensive traits in D. stramonium.https://peerj.com/articles/1411.pdfAdaptive divergenceTropane alkaloidsLeaf trichomesPlant defensePST–FST comparisonDatura stramonium |
| spellingShingle | Guillermo Castillo Pedro L. Valverde Laura L. Cruz Johnattan Hernández-Cumplido Guadalupe Andraca-Gómez Juan Fornoni Edson Sandoval-Castellanos Erika Olmedo-Vicente César M. Flores-Ortiz Juan Núñez-Farfán Adaptive divergence in resistance to herbivores in Datura stramonium PeerJ Adaptive divergence Tropane alkaloids Leaf trichomes Plant defense PST–FST comparison Datura stramonium |
| title | Adaptive divergence in resistance to herbivores in Datura stramonium |
| title_full | Adaptive divergence in resistance to herbivores in Datura stramonium |
| title_fullStr | Adaptive divergence in resistance to herbivores in Datura stramonium |
| title_full_unstemmed | Adaptive divergence in resistance to herbivores in Datura stramonium |
| title_short | Adaptive divergence in resistance to herbivores in Datura stramonium |
| title_sort | adaptive divergence in resistance to herbivores in datura stramonium |
| topic | Adaptive divergence Tropane alkaloids Leaf trichomes Plant defense PST–FST comparison Datura stramonium |
| url | https://peerj.com/articles/1411.pdf |
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