Markus S Dillenberger1, Joachim W Kadereit. 1. Institut für Spezielle Botanik, Johannes Gutenberg-Universität Mainz, Bentzelweg 9a, 55099 Mainz, Germany. dillenbe@uni-mainz.de
Abstract
PREMISE OF THE STUDY: Heterogeneity of edaphic conditions plays a large role in driving the diversification of many plant groups. In the Alps and other European high mountains, many closely related calcicole and calcifuge plant taxa exist. To better understand patterns and processes of edaphic differentiation, the phylogeny of the edaphically variable genus Adenostyles was studied. The genus contains three species, of which A. alpina has five subspecies. Each species and subspecies is largely confined to either calcareous or noncalcareous substrates. • METHODS: We analyzed the phylogeny of Adenostyles using DNA sequences of nrITS, nrETS, nuclear chalcone synthase, and three plastid markers (rpl32-trnL, psbA-trnH, and ndhF-rpl32) from 45 in-group and five out-group samples. The phylogeny was used to reconstruct ancestral edaphic associations and distribution areas. • KEY RESULTS: Within Adenostyles alpina, the shifts of edaphic association from calcicole to calcifuge in subsp. briquetii (Corsica) and in a clade of subsp. macrocephala (southernmost Italy) plus subsp. pyrenaica (Pyrenees) coincide with dispersal events. • CONCLUSIONS: We conclude that colonization of areas with novel edaphic conditions via dispersal can trigger shifts of edaphic association. Accordingly, edaphic niche shifts can result from chance events.
PREMISE OF THE STUDY: Heterogeneity of edaphic conditions plays a large role in driving the diversification of many plant groups. In the Alps and other European high mountains, many closely related calcicole and calcifuge plant taxa exist. To better understand patterns and processes of edaphic differentiation, the phylogeny of the edaphically variable genus Adenostyles was studied. The genus contains three species, of which A. alpina has five subspecies. Each species and subspecies is largely confined to either calcareous or noncalcareous substrates. • METHODS: We analyzed the phylogeny of Adenostyles using DNA sequences of nrITS, nrETS, nuclear chalcone synthase, and three plastid markers (rpl32-trnL, psbA-trnH, and ndhF-rpl32) from 45 in-group and five out-group samples. The phylogeny was used to reconstruct ancestral edaphic associations and distribution areas. • KEY RESULTS: Within Adenostyles alpina, the shifts of edaphic association from calcicole to calcifuge in subsp. briquetii (Corsica) and in a clade of subsp. macrocephala (southernmost Italy) plus subsp. pyrenaica (Pyrenees) coincide with dispersal events. • CONCLUSIONS: We conclude that colonization of areas with novel edaphic conditions via dispersal can trigger shifts of edaphic association. Accordingly, edaphic niche shifts can result from chance events.
Authors: Clemens Pachschwöll; Pedro Escobar García; Manuela Winkler; Gerald M Schneeweiss; Peter Schönswetter Journal: PLoS One Date: 2015-03-06 Impact factor: 3.240
Authors: Esteban Salmerón-Sánchez; Javier Fuertes-Aguilar; Stanislav Španiel; Francisco Javier Pérez-García; Encarna Merlo; Juan Antonio Garrido-Becerra; Juan Mota Journal: PLoS One Date: 2018-12-21 Impact factor: 3.240