Hartmut H. HilgerFreie Universität Berlin | FUB · Institute of Biology
Hartmut H. Hilger
Dr.
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473
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Introduction
Our working group studied the evolution and relationships between plant taxa world wide. Boraginaceae servesdas the model group. To establish these relationships, we implemented not only the classical and indispensible methodologies - anatomy and morphology, together with the analysis of growth processes (ontogenetics) by light microscopy and scanning electron microscopy - but also DNA systematics. This confirmed existing relationships or reveal previously unknown or unconsidered characters.
Additional affiliations
November 1988 - present
August 1982 - November 1988
July 1977 - July 1982
Publications
Publications (473)
Bryophyte Phylogeny Poster ... outdated version!
Please refer to the below link on RG for the full reference and downloadable file of the poster: https://www.researchgate.net/publication/257240194_Bryophyte_Phylogeny_Poster_BPP_2019
Bryophyte Phylogeny Poster
This educational poster presents an overview of the evolutionary relationships among nonvascular land plants based on broad consensus as of early 2019. The phylogenetic tree depicts the divisions, subclasses, orders, and families of "bryophytes", listing the main apomorphies and plesiomorphies as well as diagnostic and no...
After a period of vegetative growth plants undergo a developmental switch to the reproductive phase, inducing the transition to bolting, elongation of the inflorescence and flowering. We have identified calcium-dependent protein kinase CPK28 from Arabidopsis thaliana as a regulatory component controlling stem elongation and vascular development. In...
Nachdem das Poster zur Angiospermensystematik positiv aufgenommen wurde, sollen nun auch die übrigen Hauptgruppen der rezenten Landpflanzen in einer entsprechenden Form und kostenloser Download-Möglichkeit präsentiert werden. Es folgen zunächst „Tracheophyten/Gefäßpflanzen“ (ohne Blütenpflanzen) und im nächsten Schritt die „Bryophyten/Moosverwandte...
The uplift of the Andes was a major factor for plant diversification in South America and had significant effects on the climatic patterns at the continental scale. It was crucial for the formation of the arid environments in south-eastern and western South America. However, both the timing of the major stages of the Andean uplift and the onset of...
Little is known about vegetative morphological diversification in Neotropical plant clades in comparison with diversification of reproductive characters. Phylogenetic relationships of the Neotropical Heliotropium (Heliotropiaceae) were studied using sequences of nrITS and four plastid regions (trnL-trnF, trnS-trnG, trnH-psbA, rps16). Vegetative mor...
Relationships within the angiosperms have been substantially clarified within the past few decades. Summarizing the community’s efforts, 42 plant systematists coauthored the first ground-breaking paper in 1993 proposing a new phylogeny for angiosperms based on the hitherto obtained DNA sequences of plastid rbcL. This eventually led to APG (1998), A...
Die wissenschaftliche Botanik bemüht sich um ein System, das die Stammesgeschichte (Phylogenie) und damit die natürlichen Verwandtschaftsbeziehungen zwischen den Pflanzengruppen möglichst genau widerspiegelt. Seit der Einführung molekularer Techniken und der Anwendung computergestützter Auswertungsverfahren zur Rekonstruktion der Phylogenie sind wi...
The plate designated as lectotype of the name Heliotropium arborescens L. (1759) does not permit a precise application of the name. The herbarium material associated with that illustration was examined in order to clarify the identity of the type material and an epitype was selected. The epitype corresponds in morphology to the taxon called Heliotr...
The plate designated as lectotype of the name Heliotropium arborescens L. (1759) does not permit a precise application of the name. The herbarium material associated with that illustration was examined in order to clarify the identity of the type material and an epitype was selected. The epitype corresponds in morphology to the taxon called Heliotr...
We present a revision of Lithospermum for South America based on extensive field work and herbarium study which leads to the recognition of ten species including five new to science: Lithospermum bolivariensis, L. cuzcoensis, L. leymebambensis and L. rodriguezii from Peru, and L. azuayensis from Ecuador. The South American species group is morpholo...
Die molekulargenetische Forschung der letzten 30 Jahre hat dazu geführt, dass die heutige Pflanzensystematik annähernd die tatsächliche Evolution der Pflanzen widerspiegelt.
Das neue phylogenetische System vervollständigt das in Jahrhunderten gewachsene Wissen über Strukturen (Morphologie/ Anatomie) oder lnhaltsstoffe (Chemotaxonomie) der Pflanzen....
We present a revision of Lithospermum for South America based on extensive field work and herbarium study which leads to the recognition of ten species including five new to science: Lithospermum bolivariensis, L. cuzcoensis, L. leymebambensis and L. rodriguezii from Peru, and L. azuayensis from Ecuador. The South American species group is morpholo...
Calcareous pericarps of the tribe Lithospermeae (fam. Boraginaceae) are a common component of archaeobotanical macroremain assemblages in the Mediterranean region. In this study, the relationship between oxygen isotopic composition of fruit biogenic carbonate and climatic conditions was examined. δ18O and δ13C values of biogenic carbonate were meas...
Boraginaceae tribe Trigonotideae comprises a heterogenous assemblage of taxa, many of which have been shown to belong to widely divergent lineages in Boraginaceae in the recent past, with some taxa now assigned to three of the four currently recognized tribes of the Boraginaceae s.
s., namely the Cynoglosseae, Echiochileae, and Lithospermeae. The s...
It is shown that doubts raised recently (Feddes Rep. 119: 622–624, 2008) about the validity of Ochetophila Poepp. ex Endl. as distinct from Discaria Hook. are based on unsound arguments. The distinctness of Ochetophila rests upon a solid cladistic analysis of the tribe Colletieae (Rhamnaceae) and adequately reflects the current knowledge of this gr...
Phylogenetic relationships are complex within the Lithospermeae, a large subgroup of the Boraginaceae s.str. The relationships of New World Lasiarrhenum, Macromeria, Nomosa, Onosmodium, Perittostoma, and Psilolaemus to subcosmopolitan and much larger Lithospermum have not been critically investigated in the recent past. No molecular data on the phy...
Lithodora (Boraginaceae tribe Lithospermeae) comprises nine species of often narrowly endemic dwarf shrubs and shrubs. The genus shows a Mediterranean distribution with the centre of diversity in the western Mediterranean region. Lithodora is distinguished from its allies in Lithospermeae by a shrubby habit, the absence of both faucal scales and an...
Basierend auf dem breiten Konsens der Fachwelt gibt es das nach molekularen Merkmalen aufgestellte System der Blütenpflanzen klar, übersichtlich und didaktisch sinnvoll auf einem Poster. Einprägsam auf den Punkt gebracht, ist es eine ideale Lern- und Lehrhilfe für die Botanik. Der Stammbaum veranschaulicht die verwandtschaftlichen Beziehungen und Z...
We performed a molecular phylogenetic analysis of the generic complex Nonea/Elizaldia/Paraskevia/Pulmonaria (Boraginaceae-Boragineae), using trnLUAA and ITS1 sequences from non-coding plastid and nuclear DNA, respectively. In the strict consensus of most parsimonious trees from combined ITS1/trnL sequences the ingroup forms a monophyletic group wit...
Recent molecular and morphological analyses show that Discaria is polyphyletic and consists of two separate clades, Discaria sens. str. and a clade of two species from Chile and Argentina: D. trinervis and D. nana. The genus Ochetophila is here reinstated to accommodate these two species. A revised synonymy is presented, and a new combination is pr...
Hilger, H. H., Gottschling, M., Selvi, F., Bigazzi, M., Långström, E., Zippel, E., Diane, N. & Weigend, M.: The Euro+Med treatment of Boraginaceae in Willdenowia 34 — a response. — Willdenowia 35: 43–48. — ISSN 0511-9618; © 2005 BGBM Berlin-Dahlem. doi:10.3372/wi.35.35101 (available via http://dx.doi.org/) The classification of B. Valdés proposed i...
The gametophyte-sporophyte junction in Selaginella martensii (Selaginellales, Lycopodiophyta) consists of a sporophytic conical foot embedded in the maternal gametophytic tissue. Both generations are separated by a narrow placental space filled with thin-walled collapsed cells of gametophytic origin. Gametophytic and sporophytic placental cells lac...
The phylogenetic relationships within the tribe Colletieae (Rhamnaceae) were examined combining data from a previous morphological analysis with data from the trnL intron and trnL-F spacer. Previous studies have failed to confirm monophyly of the genus Discaria, the only genus of the tribe with an amphiantarctic distribution. The data set was analy...
The phylogenetic relationships of Cordiaceae were investigated using ITS1 sequences from 50 ingroup taxa and three outgroup taxa. Molecular analyses suggest that Coldenia procumbens, traditionally placed in Ehretiaceae, is more closely allied to Cordiaceae and is sister to their core representatives. Cordiaceae segregate into four major monophyleti...
The systematic position of Argentinean Cortesia cuneifolia (Ehretiaceae, Boraginales) is investigated based both on morphological and on ITS1 sequence data. Inferred from a molecular phylogeny, monotypic Cortesia is not isolated from other taxa of Ehretiaceae as previously suggested, but is nested within Ehretia. Cortesia shares a two-parted endoca...
The new species Nonea pisidica (Boraginaceae-Boragineae) is described based on two collections by the authors from the region of Lake Burdur in southwest Anatolia, Turkey. It shows a combination of morphological characteristics concerning habit, flower, and fruit that distinguishes it from N. caspica and N. pallens, the two more similar taxa in Non...
Hypotheses on the origin of the current distribution patterns and bicontinental disjunctions of Cordiaceae, Ehretiaceae, and Heliotropiaceae (Primarily Woody Boraginales) are tested by pairwise comparison of Kimura two-parameter distances. Estimated absolute dates of fossils and geological events (plate tectonics, climate changes) were used to cali...
A molecular phylogenetic analysis of Cynoglottis was performed to evaluate previous hypotheses based on non-molecular evidence concerning the position of this genus within Boraginaceae tribe Boragineae. ITS-5.8S and trnLUAA sequences from the nuclear and chloroplast non-coding genomes were obtained for four Cynoglottis taxa and selected members of...
Ehretia (Ehretiaceae, Boraginales) has been divided into two major clades, characterised by fruits with four endocarpids (Ehretia I, including species of Ehretia formerly belonging to Rotula) and by fruits with two endocarpids (Ehretia II, plus E. microphylla (= Carmona retusa) with an undivided endocarp), respectively. Both molecular (ITS1) and mo...
Leaf anatomy and the distribution of foliar trichome types of 65 species of Heliotropiaceae have been investigated. The aim was to evaluate the systematic relevance of their diversity as compared to recent findings of systematic relationships within the family. The results of leaf anatomy patterns, especially venation, vascular system, various foli...
The infrafamilial relationships of Heliotropiaceae (Boraginaceae subfam. Heliotropioideae according to traditional systems) are reevaluated using molecular data of nuclear ITS1 (86 species) and plastidal trn LUAA intron (66 species) sequences. The results obtained from our investigations show that traditional generic limits warrant adjustment. Heli...
Boraginaceae have erroneously been associated with helicoid cymes, when upon closer inspection they exclusively possess scorpioid cymes (cincinni). A discussion of the inflorescence structure in Boraginaceae is presented with the help of an overview of monochasial branching systems and a three-dimensional representation thereof. Reasons for the inc...
