It has been a long-standing mystery how complex biological structures emerge from such seemingly uncoordinated building blocks as cells and tissues, in the presence of only minimal environmental guidance.

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).

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

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.

The physical origin of the dozens of stellar-mass binaries, the mergers of which have been detected by the LIGO-Virgo-KAGRA collaboration via gravitational waves, is still unknown.

Beneficial plant-associated microbiota, particularly those inhabiting the rhizosphere, contribute substantially to plant health through pathogen suppression, stimulation of plant defence responses, and enhanced nutrient acquisition.

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.

Salicylic acid (SA) is a plant hormone, which is involved in the defense responses to pathogens and to abiotic stress, and in the regulation of plant growth and development.

Supervisor: P.J.J. Hooykaas Co-Supervisor: R. Offringa

In dit artikel onderzoeken Lara van Osch, Sandra Groeneveld en Ben Kuipers de manier waarop leidinggend gedrag van eerstelijnsfunctionarissen in teams wordt ingezet om publieke waarde te creëren.

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This thesis aimed to investigate core cross-linked polymeric micelles (CCPMs) and expand their potential for the delivery of hydrophobic drugs and co-factors.

This thesis takes steps toward understanding the interaction between gas-phase and solid-state molecules in star- and planet-forming regions.

Multicellular giant algae Chara species have been widely used in physiological studies for decades.

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: M.R. Hogerheijde

This thesis addresses the chemical processes that determine the compositions of giant planet atmospheres.

This thesis aims to enhance our understanding of galaxies by testing theoretical models of galaxy formation against observations, particularly in the cases of extreme systems which have been found to have an excess of baryonic mass in their central regions, in the form of either supermassive black holes…

Promotor: G.R. de Snoo, Co-promotor: H.H. de Iongh, C.J.M. Musters

My work focuses on a class of astronomical objects called protoplanetary disks.

Protoplanetary disks are the gas and dust environments where planetary systems form around young stars. Using observations from the Atacama Large Millimeter/submillimeter Array (ALMA) this thesis analyses the gaseous molecular reservoir, using multiple tracers to resolve the 3D structure of protoplanetary…

Detecting planets during their formation stages is crucial for understanding the history and diversity of fully developed planetary systems like our own. However, observing young planets directly is challenging because they are often deeply embedded within their host protoplanetary discs, rich in gas…

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: G.J. Herczeg

This thesis focusses on the temperature structure in protoplanetary disks. The relation between structures seen in the dust and gas-phase molecules is investigated.

Prof.dr. J. Memelink

By growing in a soil plants change the biotic and abiotic properties of the soil in which they grow.

OB associations are loose groups of young, massive stars. They constitute the last stage of the massive starformation process, and the context in which new stars are formed.

Herstel van de natuur op uitgeputte landbouwgrond en in natuurgebieden verloopt moeizaam. ‘Bodemtransplantatie’ kan mogelijk uitkomst bieden. Dat betoogt Martijn Bezemer, hoogleraar Ecologie van Plant-Microbe-Insect interacties. Oratie op 18 december.

The work presented in this thesis is based on ALMA surveys of protoplanetary disks in three star-forming regions: Lupus, OMC-2, and NGC 2024.

Promotores: Prof.dr. E.F. van Dishoeck, Prof.dr. C.P. Dullemond

Promotor: Prof.dr. A.G.G.M. Tielens, Prof.dr. C. Dominik (UvA)

When a star is born in our Galaxy, it is quite likely that it has formed within a massive cluster, which hosts numerous high-mass stars bathing their lower mass neighbours in UV radiation.

Circumstellar discs are the reservoirs of gas and dust that surround young stars and have the potential to become planetary systems.

Zonder een gewas opnieuw te zaaien toch nakomelingen produceren, die zelfs groter kunnen zijn dan de ouderplant. Volgens Leidse onderzoekers is dat mogelijk door het overstimuleren van één gen. Daarmee verjongt een cel en gaat deze terug naar de embryonale fase.

Diverse types of exoplanets such as gas giants on close-in orbits (hot Jupiters) and young massive giants on wide orbits (super Jupiters), with no analogs in the Solar System, pose challenges but also opportunities to our understanding of planet formation and evolution.

Zet een plant in de vensterbank en hij zal binnen enkele uren naar het licht gegroeid zijn. Voor het eerst is dit mechanisme in planten op moleculair niveau in kaart gebracht door Leidse biologen en onderzoekers uit Gent en Lausanne. Ze publiceerden hierover in het prestigieuze Nature Cell Biology.

Remko Offringa is per 1 april 2017 benoemd tot hoogleraar Ontwikkelingsgenetica van planten. Zijn leerstoel is gevestigd bij het Instituut Biologie Leiden (IBL) , onderdeel van de Faculteit der Wiskunde en Natuurwetenschappen.

Promotores: Prof.dr. J. Schaye & Prof.dr. C. Steidel (California Institute of Technology)

This thesis examines the link between simple molecules and the underlying structure and chemistry within protoplanetary disks - the birthplaces of planets.

Low-mass main-sequence stars like our Sun are continuous sources of outflowing hot magnetised plasma. In the case of the Sun, this is known as the solar wind, whereas for other stars they are called stellar winds.

In this thesis chemical and physical processes in the ice mantles on interstellar dust grains are studied.

Promotor: J.M. Memelink

‘Dit was een ontdekking die we niet hadden zien aankomen,’ vertelt Remko Offringa, hoogleraar ontwikkelingsgenetica van planten. Vandaag publiceert hij in Current Biology een nieuwe functie van een veelzijdig gen: het maakt voor planten het verschil tussen een kruidachtige of een verhoute stengel.…

This thesis focuses on protoplanetary disks: flattened structures of gas and dust around young stars in which planets are expected to form and grow.

Plants, are sessile organisms, have developed strategies to adapt to changes in their environment, in part by altering their growth and development.

Promotor: Arjen Doelman, Co-promotor: Vivi Rottschäfer