Signals of speciation volatile organic compounds resolve closely related sagebrush taxa, suggesting their importance in evolution

Signals of speciation : volatile organic compounds resolve closely related sagebrush taxa, suggesting their importance in evolution

No claim to US Government works New Phytologist © 2016 New Phytologist Trust.

Détails bibliographiques
Publié dans:The New phytologist. - 1979. - 211(2016), 4 vom: 25. Sept., Seite 1393-401
Auteur principal: Jaeger, Deidre M (Auteur)
Autres auteurs: Runyon, Justin B, Richardson, Bryce A
Format: Article en ligne
Langue:English
Publié: 2016
Accès à la collection:The New phytologist
Sujets:Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Artemisia tridentata GC-MS Random Forest common garden dynamic headspace plant volatiles Volatile Organic Compounds
Description
Résumé:No claim to US Government works New Phytologist © 2016 New Phytologist Trust.
Volatile organic compounds (VOCs) play important roles in the environmental adaptation and fitness of plants. Comparison of the qualitative and quantitative differences in VOCs among closely related taxa and assessing the effects of environment on their emissions are important steps to deducing VOC function and evolutionary importance. Headspace VOCs from five taxa of sagebrush (Artemisia, subgenus Tridentatae) growing in two common gardens were collected and analyzed using GC-MS. Of the 74 total VOCs emitted, only 15 were needed to segregate sagebrush taxa using Random Forest analysis with a low error of 4%. All but one of these 15 VOCs showed qualitative differences among taxa. Ordination of results showed strong clustering that reflects taxonomic classification. Random Forest identified five VOCs that classify based on environment (2% error), which do not overlap with the 15 VOCs that segregated taxa. We show that VOCs can discriminate closely related species and subspecies of Artemisia, which are difficult to define using molecular markers or morphology. Thus, it appears that changes in VOCs either lead the way or follow closely behind speciation in this group. Future research should explore the functions of VOCs, which could provide further insights into the evolution of sagebrushes
Description:Date Completed 26.01.2018
Date Revised 30.09.2020
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.13982