Decrease in the diversity of pyrrolizidine alkaloids of Senecio pterophorus after invasion
Sánchez González, Alejandro
Castells, Eva

Date: 2014
Description: 37 p.
Abstract: Pyrrolizidine alkaloids (PAs) are N-based plant secondary metabolites that function as chemical defenses against vertebrate and invertebrate herbivores. PAs can be highly variable at intraspecific level, both in their absolute and relative concentrations. Changes in the chemical composition of exotic plants when they invade a new environment have been poorly explored. Here we studied the biogeographical variation on PAs in Senecio pterophorus (Asteraceae) in the native region in Eastern South Africa, an expanded region in Western South Africa, and two introduced regions in Australia and Europe. PAs in S. pterophorus were represented by the highly toxic 1,2-unsaturated PAs and the less toxic 1,2-saturated PAs. Our results show a change in the plant chemical composition after invasion. Total PAs concentrations were highest in Australia compared to any other region. Plants from Europe contained the highest relative concentrations of 1,2-saturated PAs. The positive correlation between the chemical and the genetic distances estimated between populations suggests that the chemical profiles in the non-native regions were related to the plant dispersal routes. The decrease in the chemical diversity and the change in the absolute PAs concentrations in S. pterophorus after invasion may have consequences in the interactions between plants and herbivores in the novel habitats.
Note: Número d'acord de subvenció MICINN/CGL2008-02421/BOS
Note: Número d'acord de subvenció MICINN/CGL2011-29205
Rights: L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons: Creative Commons
Language: Anglès.
Series: Facultat de Biociències. Treballs de màster i postgrau. Màster en Ecologia Terrestre i Gestió de la Biodiversitat
Document: masterThesis
Subject: Plantes exòtiques ; Plantes invasores ; Química vegetal ; Asteràcies ; Alcaloides

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37 p, 724.7 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Health sciences and biosciences > Chemical Ecology and Toxicology Lab
Research literature > Dissertations > Biosciences. Master Theses

 Record created 2015-07-13, last modified 2019-02-02

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