Beck A.,Botanische Staatssammlung Munich |
Beck A.,Ludwig Maximilians University of Munich |
Mayr C.,Ludwig Maximilians University of Munich |
Mayr C.,Friedrich - Alexander - University, Erlangen - Nuremberg
Ecology and Evolution | Year: 2012
Stable isotope patterns in lichens are known to vary largely, but effects of substrate on carbon and nitrogen stable isotope signatures of lichens were previously not investigated systematically. N and C contents and stable isotope (δ15N, δ13C) patterns have been measured in 92 lichen specimens of Xanthoria parietina from southern Bavaria growing on different substrates (bark and stone). Photobiont and mycobiont were isolated from selected populations and isotopically analyzed. Molecular investigations of the internal transcribed spacer of the nuclear ribosomal DNA (ITS nrDNA) region have been conducted on a subset of the specimens of X. parietina. Phylogenetic analysis showed no correlation between the symbionts X. parietina and Trebouxia decolorans and the substrate, isotope composition, or geographic origin. Instead specimens grown on organic substrate significantly differ in isotope values from those on minerogenic substrate. This study documents that the lichens growing on bark use additional or different N sources than the lichens growing on stone. δ15N variation of X. parietina apparently is controlled predominantly by the mass fraction of the mycobiont and its nitrogen isotope composition. In contrast with mycobionts, photobionts of X. parietina are much more 15N-depleted and show less isotopic variability than mycobionts, probably indicating a mycobiont-independent nitrogen acquisition by uptake of atmospheric ammonia.© 2012 The Authors. Ecology and Evolution published by Blackwell Publishing Ltd.
Dal Grande F.,Swiss Federal Institute of forest |
Widmer I.,Swiss Federal Institute of forest |
Beck A.,Botanische Staatssammlung Munich |
Scheidegger C.,Swiss Federal Institute of forest
Conservation Genetics | Year: 2010
We isolated and characterized eight microsatellite markers for Dictyochloropsis reticulata, the primary photosynthetic partner of the epiphytic lichen Lobaria pulmonaria. These are the first microsatellite loci reported for a lichen symbiotic alga. These polymorphic markers will be useful for investigating spatial genetic structure, biogeography and dispersal of this eukaryotic alga and will generally shed light on the coevolution of the green-algal lichen symbioses. © 2009 Springer Science+Business Media B.V.
Sadowski E.-M.,University of Gottingen |
Seyfullah L.J.,University of Gottingen |
Sadowski F.,Bielefeld University |
Fleischmann A.,Botanische Staatssammlung Munich |
And 2 more authors.
Proceedings of the National Academy of Sciences of the United States of America | Year: 2015
The fossil record of carnivorous plants is very scarce and macrofossil evidence has been restricted to seeds of the extant aquatic genus Aldrovanda of the Droseraceae family. No case of carnivorous plant traps has so far been reported from the fossil record. Here, we present two angiosperm leaves enclosed in a piece of Eocene Baltic amber that share relevant morphological features with extant Roridulaceae, a carnivorous plant family that is today endemic to the Cape flora of South Africa. Modern Roridula species are unique among carnivorous plants as they digest prey in a complex mutualistic association in which the prey-derived nutrient uptake depends on heteropteran insects. As in extant Roridula, the fossil leaves possess two types of plant trichomes, including unicellular hairs and five size classes of multicellular stalked glands (or tentacles) with an apical pore. The apices of the narrow and perfectly tapered fossil leaves end in a single tentacle, as in both modern Roridula species. The glandular hairs of the fossils are restricted to the leaf margins and to the abaxial lamina, as in extant Roridula gorgonias. Our discovery supports current molecular age estimates for Roridulaceae and suggests a wide Eocene distribution of roridulid plants. © 2015, National Academy of Sciences. All rights reserved.
Schlauer J.,Zwischenstr. 11 |
Fleischmann A.,Botanische Staatssammlung Munich
Biochemical Systematics and Ecology | Year: 2016
Naphthoquinone patterns found in Drosera hybrids between quinone-heterogenous parent species are reported here for the first time. Quinone patterns are constant in and characteristic for all taxa investigated. Each investigated parent species contains only one quinone isomer (either plumbagin or 7-methyljuglone), whereas all investigated hybrids between quinone-heterogenous parent species contain both isomers at almost equal concentrations, which indicates co-dominant heredity resulting from expression of both parental loci affecting regioselectivity in the biosynthesis of these acetogenic metabolites. This allows predictions on hybridity (and possibly on parentage) in some taxa of the genus. © 2016 Elsevier Ltd.
Esser H.-J.,Botanische Staatssammlung Munich
Novon | Year: 2010
The new combination Stillingia tenella (Pax & K. Hoffm.) Esser is proposed, which is based on an overlooked name originally described in Sapium Jacq. and replaces Stillingia yungasensis Belgrano & Pozner as a new synonym. © 2010 Missouri Botanical Garden.