Promotor: Prof.dr. H.W. Lenstra

The unit residue group, to which the present thesis is devoted, is defined using the norm-residue symbol, which Hilbert introduced into algebraic number theory in 1897.

Promotor: Prof.dr. P. Stevenhagen

Promotores: H.W. Lenstra, A. Lucchini

Plant exudates appeared long time ago in the history line of life in the early Devonian. They are typical saps produced by specialized cells.

Maak een reis door de geschiedenis en de toekomst van het leven op aarde.

De missie van het Plant Sciences onderzoeksprogramma is om bij te dragen aan de duurzame productie van gewassen van hoge kwaliteit, bloemen en hoogwaardige producten met een biologische basis. Dit wordt gerealiseerd door het opdoen van fundamentele kennis over biologische processen omtrent de ontwikkeling…

Promotor: S.M. Verduyn Lunel, Co-promotores: M.F.E. de Jeu, B. de Pagter

Voor groep 4/5 basisschool.

In this thesis, the role of plant-mediated soil legacy effects in shaping aboveground plant-insect interactions was investigated.

In my research, we developed a method to distinguish knots. A knot is a mathematical depiction of the everyday knot that occurs in ropes and cords.

Biodiversity enables ecosystems to thrive through the synergy of functional differences among organisms. While human well-being strongly depends on biodiversity-driven ecosystem services, human actions are also at the root of current unprecedented biodiversity declines.

The extensive use of electronic communication channels and other devices has opened new possibilities for collecting data on human behavior. This information is sometimes openly accessible, but largely part of administrative registration systems that are not open to the broader public. The data provides…

Het onderzoek van de Intelligence and Security Studies Group naar inlichtingen en veiligheid draagt bij aan academische kennis, voedt de publieke discussie, ondersteunt ons onderwijs en de ontwikkeling van professionele praktijk.

Plants are colonized by an astounding number of microorganisms that can provide different life-support functions, including nutrient acquisition and protection against (a)biotic stresses like drought or pathogen attack.

The main topic of this PhD thesis is the Arakelov ray class group of a number field, an algebraic object that contains both the ideal class group structure and the unit group structure.

This dissertation is a collection of four research articles devoted to the study of Kummer theory for commutative algebraic groups.

Special Interest Groups (SIG's) zijn thematische community’s die gericht zijn op verandering en actie, waarbinnen vooruitstrevende medewerkers vanuit alle faculteiten en expertisecentra samenwerken aan opkomende en actuele onderwijskwesties. Deze groepen zijn zowel horizontaal als verticaal binnen de…

Plant diversity is essential for us and our planet as it sustains the stability of our ecosystems, provides vital materials and food to us and supports many ecosystem services.

The overall objectives of my thesis are to investigate the dynamics of the sorghum root microbiome and to explore the beneficial effects of the root microbiome on sorghum growth and stress tolerance.

Plant-microbe interaction resulted in different physio/chemical responses by host plant and interacting rhizobacteria.

Terroristische groepen passen zich aan veranderingen in hun omgeving aan om relevant te blijven. Dit project biedt nieuwe inzichten door een theorie over strategische doelwitselectie te ontwikkelen en big data-analyse en machine learning toe te passen om de hypothesen te testen.

Promotor: Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Univ. de Bordeaux)

Promotores: P. Stevenhagen, E. Fouvry (Univeriste Paris Saclay)

In light of climate change, it is crucial to determine whether plant species can adapt to future climates to avoid extinction. Plants adapt to various conditions by altering their functional traits, such as leaf size or photosynthetic rate. Some traits appear linked and vary together between species,…

Trigonostemon Blume is a plant genus in the family Euphorbiaceae comprising 59 species.

The thesis focuses on synthesis strategies in oligosaccharide campaigns, and the influence of protecting groups.

Soil biodiversity is of great importance for the maintenance of multifunctionality in terrestrial ecosystems.

Wetland plants are distinguished from plants of other terrestrial ecosystems by their adaptations to specific habitat stresses, including waterlogged and flooding and the subsequent abundance of phytotoxic compounds.

Promotor: Prof.dr. P. Hooykaas, Co-promotor: R. Offringa

Plants and soils from natural ecosystems harbor great diversity of soil microorganisms, which could potentially contribute to the sustainability of horticulture. The knowledge about using wild plant species and soil from natural ecosystem to improve the crop health will advance the application of ecological…

Promotor: Prof.dr. W.T.F. den Hollander

Let A be a commutative algebraic group over a field K, and let G be a finitely generated subgroup of the K-rational points of A. The purpose of this thesis is to study the degrees of the Kummer extensions relative to A,K and G.

Most of current public-key cryptography is considered insecure against attacks from sufficiently powerful quantum computers. Post-quantum cryptography studies methods to secure information resistant against such attacks. One proposal is isogeny-based cryptography, which bases its security on computational…

Agrobacterium-mediated transformation (AMT) has abundantly been used for scientific research for identifying valuable traits.

Promotor: G.R. de Snoo, Co-promotor: C.J.M. Muster

In this thesis we classify the pairs (p,G), where p is a prime number and G is a finite p-group possessing an intense automorphism, i.e. an automorphism that sends each subgroup of G to a G-conjugate, that is non-trivial and whose order is coprime to p.

This thesis describes how different colours of light affect various aspects of the growth and development of Arabidopsis and tomato plants⁠.

The endophytic microbiota is a community of various microorganisms that reside in plant tissue. These microbes are known to promote plant health and resilience, and their members do not simply exist side by side.

Promotor: Prof.dr. P.G.L Klinkhamer, Co-promotor: K. Vrieling

In this thesis, I focused on studying the above- and belowground interactions of J. vulgaris from a plant-soil feedback (hereafter, PSF) perspective. I investigated the temporal variation of negative PSF and examined the effects of root-associated bacteria on plant performance and aboveground herbiv…

The plant hormone auxin regulates plant growth and development through polar cell-to-cell transport-generated maxima and minima. PIN FORMED (PIN) auxin efflux carriers determine the direction of this auxin flow through their asymmetric placement on the plasma membrane (PM).

Microbiome composition of the spermosphere and the rhizosphere of wild and modern bean accessions grown in an agricultural and a native soil from Colombia was characterized by metagenomics and cultivation-dependent approaches.

In dit proefschrift wordt verslag gedaan van vier studies waarin het samenwerken tussen docenten in opleiding (dio’s) onderzocht is. Samenwerking in de lerarenopleiding is belangrijk, omdat dit het leerproces van de dio’s tijdens de lerarenopleiding kan stimuleren en omdat ze zo voorbereid kunnen worden…

De onderzoeksgroep War, Peace and Justice onderzoekt de samenhang tussen oorlog, vrede en gerechtigheid. Met een multidisciplinaire aanpak brengen onderzoekers en praktijkdeskundigen nieuwe inzichten in conflict, duurzame vrede en mensenrechten, met bijzondere aandacht voor gender en veiligheid.

De onderzoeksgroep Diplomacy and Global Affairs richt zich op internationale diplomatie, governance en vergelijkend onderzoek, met aandacht voor thema's zoals de EU, de VN, uitbreiding van de EU, de rechtsstaat, en democratische achteruitgang.

Wanneer een fysisch systeem symmetrieën bezit gaan deze vaak gepaard met een representatie van de symmetriegroep op een Hilbertruimte. Groepsrepresentaties op Hilbertruimten zijn intensief onderzocht.

Plantaardige plakdruppels voor gewasbescherming tegen trips: Sommige planten zoals zonnedauw en tomaat beschermen zichzelf met plakkerige haartjes die geleedpotige herbivoren afstoten of zelfs kunnen vangen.

We showed that constitutive and inducible chemical and morphological defenses against Western flower thrips differ between tomato and chrysanthemum plants.