Welcome to JLUpub

Communities in JLUpub

Select a community to browse its collections.

Now showing 1 - 2 of 2

JLUdata
Forschungsdatenrepositorium
JLUdocs
Schriftenrepositorium

Recent Submissions

Partnership throughout the ages: The coevolution of the transcriptional regulators LEUNIG and SEUSS in the green plant lineage
(2026) Garrecht, Julian Vincent
The LEUNIG (LUG) and SEUSS (SEU) families of transcriptional regulators are centralmodulators of angiosperm development, with relevance lower formation, developmentof male and female gametangia, embryo development, and general plant growth. Theirinteraction forms a regulatory platform, bringing transcription factors and histone mod‐i iers together to both activate and repress target gene expression, thus creating a vastgene regulatory network. Interestingly, both families are deeply conserved, being presentin all land plant lineages and in many streptophyte algae, raising questions about whenthe origin of the LUG – SEU protein module, about their functions outside of angiosperms,and how the module evolved to govern various critical reproductive processes. This dis‐sertation demonstrates that the protein interaction between these two families, and withthe MADS‐box transcription factor family, evolved at least 800 million years ago in thestreptophyte algae, an that LUG and SEU exhibit a strong coevolution ever since. Theyare shown to function as gene regulatory hubs that, among other things, evolved along‐side the MADS‐box proteins to regulate multiple aspects of lower development and an‐giosperm reproduction, in concert with functions in stress response and phytohormonesignaling. Furthermore, the functions of LUG homologs in the moss Physcomitrium patenswere studied, revealing their connections to a critical developmental transition in mosses,and to the regulation of the auxin signaling pathway of land plants.
Seed inoculation of Hartmannibacter diazotrophicus does not alter the rhizosphere bacterial microbiome of wheat and barley in a three-year field trial
(2025) Quiroga, Santiago; Ratering, Stefan; Rosado-Porto, David; Rekowski, Azin; Schulz, Franz; Zörb, Christian; Schnell, Sylvia
The effects of plant growth promoting bacteria used for inoculation on native microorganisms remain unexplored under field conditions and, to a lesser extent, in longitudinal studies using different crops. This study, spanning three seasons across two organic fields, examined through 16S rRNA gene sequencing how the seed inoculation of Hartmannibacter diazotrophicus influenced the rhizosphere bacterial communities of wheat and barley. In addition to bacterial inoculation, the effects of row spacing and organic fertilizer application were also assessed. Together with previous results, we determined that H. diazotrophicus could improve crop yield parameters without altering the bacterial community composition. Alpha and beta diversity indices showed non-significant effects for most of the three factors evaluated. The 19 most prevalent taxa at the genus level were identified in both crop species, which mainly encompassed the phyla Pseudomonadota, Acidobacteriota, and Actinomycetota. Differential abundance analysis showed that the location significantly influenced the recruitment of different bacterial communities by the same crop species. While in one organic farm, 2860 ASVs were affected by crop species, 232 ASVs were impacted at the other location. Further analyses, including longitudinal analysis, linear mixed model effects, and diversity indices, showed a significant effect of location, crop species, and season on the dynamics of bacterial communities. Our results are unusual compared with most of the studies reported and indicate the resilience of rhizosphere bacterial populations after the incorporation of an allochthonous microorganism such as H. diazotrophicus.
On the largest independent sets in the Kneser graph on chambers of PG(4,q)
(2025) Heering, Philipp
Let Γ4be the graph whose vertices are the chambers of the finite projective 4-space PG(4,q), with two vertices being adjacent if the corresponding chambers are in general position. For q≥749we show that (q2+q+1)(q3+2q2+q+1)(q+1)2is the independence number of Γ4and the geometric structure of the largest independent sets is described.
Das individuelle Beratungsportfolio: Eine Möglichkeit zur Dokumentation, Analyse, Reflexion und Kom-munikation von Beratungskompetenz
(2026-07-06) Krebs, Niklas
Diese wissenschaftliche Handreichung richtet sich an alle Forschenden, Lehrenden und Verwaltenden, denen im Rahmen ihrer Tätigkeiten Beratungsaufgaben zukommen und sie diese einmal professionell dokumentieren, analysieren, reflektieren und adressatengerecht kommunizieren möchten. In ihr wird ausführlich dargelegt, aus welchen Kontexten sich das individuelle Beratungsportfolio zur Dokumentation, Analyse, Reflexion und Kommunikation von Beratungskompetenz heraus entwickelt hat, wie es sich definieren lässt und wie es aufgebaut ist, aus welchen Komponenten es sich zusammensetzt und wie diese sich individuell ausformulieren lassen, welche individuellen Ziele man selbst mit ihm verfolgen und wo es überall zur Anwendung kommen kann. Im Anhang befindet sich überdies ein tabellarischer Leitfaden, an welchen man sich bei der Erstellung und Ausformulierung des eigenen individuellen Beratungsportfolios orientieren kann.
The spatial dimension of innovation and socio-technical change: insights from economic geography
(2026) Losacker, Sebastian
This habilitation thesis explores the spatial dimension of innovation and socio-technical change. While innovation is a key driver of economic development and socio-technical transformation, its geographical embeddedness remains insufficiently understood. The thesis addresses this gap by examining the origins, situatedness, and implications of innovation processes, with particular attention to the bioeconomy and the twin transition – domains of high political and societal relevance. The thesis is a cumulative one, combining 21 published articles. The theoretical foundation of this thesis draws on (and contributes to) three main strands of scholarship: First, literature on the geography of innovation, including frameworks for analyzing national, regional, technological, and global innovation systems, alongside debates on mission- and challenge-oriented policy. Second, evolutionary economic geography, including theoretical approaches to understanding specialization, diversification, relatedness, and complexity, which help explain why regional development pathways are often path-dependent and uneven. Third, transition studies, including perspectives on socio-technical systems and imaginaries, highlighting how institutional and cultural elements stabilize or transform existing systems and how visions of the future influence their directionality. Together, these strands inform an integrative perspective on the spatiality of innovation and socio-technical change. Methodologically, the thesis employs a mixed-methods design. Quantitative analyses use patent data to trace the emergence, diffusion, and geography of innovation activities, complemented by novel datasets and indicators such as machine-learning-based classifications of patent texts, large-scale web-mining of firms and municipalities, and a geolocated corpus of German news articles. Sequence analysis is introduced as a methodological innovation, enabling the study of region-specific temporal trajectories. In addition, qualitative studies provide conceptual and inductive insights into socio-technical imaginaries, legitimacy struggles, and actor constellations. The cumulative work shows that innovation and socio-technical change are spatially uneven, shaped by regional preconditions, multi-scalar linkages, and technology-specific features. It demonstrates the value of combining quantitative and qualitative approaches to capture both systematic evidence and contested, imaginative dimensions. Overall, the thesis contributes to geographically informed understandings of sustainability transitions and to debates on policies fostering inclusive, place-sensitive pathways of change.