To gain more insight into the evolutionary development of orchid flowers and fruits, the orchid species Erycina pusilla was studied. The evolutionary origin of the median petaloid sepal, the callus on the labellum, and the stelidia was studied.

This thesis presents the systematics, epidermal defense, and bioprospecting of wild orchids.

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

The study of orchid flowers, fruits, and inflorescences is crucial due to the remarkable diversity of orchid species and their unique adaptations to pollinators and seed dispersers. However, our understanding of the evolution and development of these organs within the orchid family remains limited.

As a contribution to the changing legislation and evolving societal attitudes concerning environmental issues, this project aims to enhance and manipulate the plants’ own natural defense mechanisms against western flower thrips (WFT).

A recent study on reintroduced tigers in Panna Tiger Reserve in India reveals that risks from tigers increased more because of human behaviour and people's livestock husbandry practices.

Plants and their pollinators form complex interaction networks. Within these networks, species differ widely in the number of species they interact with.

What is the population size/structure and distribution of tiger and leopard inside the Bardia National Park (BNP) compared with the population outside? What is the movement and home range and conflict pattern in time and space of tigers and leopards inside the BNP compared with outside? What constitutes…

Promotor: P.J.J. Hooykaas, Co-Promotores: P.B.F. Ouwerkerk, M. Wang

Archeoloog Gerrit Dusseldorp werd door NewScientist geïnterviewd over nieuwe vondsten die erop lijken te duiden dat de jacht in de steentijd geen pure mannenaangelegenheid was.

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 University of Poitier and UCLouvain organize two study days on the topic of funerary poetry. The aim of these sessions is to study poetic expressions of mourning in the light of their medium, their style and their usage. The study days will be held respectively in Poitiers (France) on September…

Balsaminaceae is a diverse plant family characterized by a huge floral morphological diversity.

Kunst en vrije tijd, Kunst en vrije tijd

Lezing, Leiden Lectures on Arabic Language & Culture

Promotor: Prof.dr. E.F. Smets. Co-promotores: B. Gravendeel, F. Pupulin

Promotor: R. Verpoorte, Co-promotores: Y.H.Choi, N.R. Mustafa

In this thesis, I targeted the orchid genus Lepanthes, one of the six genera of angiosperms that surpasses 1,000 species in the Neotropics, as a study model to investigate the evolutionary processes that promoted species diversifications.

The plant hormone auxin plays a central role in the growth and development of plants. Auxin acts in a concentration dependent manner and polar cell-to-cell transport of this hormone determines its distribution in the tissues of plants. This polar auxin transport is mediated by several families of auxin…

Tijdens de Nationale Dodenherdenking op de Dam in Amsterdam was dit jaar spoken word te horen. In de Volkskrant duidt emeritus hoogleraar Mineke Schipper de herkomst van dit genre.

Promotie

Lezing

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…

Promotie

Promotie

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

Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver

In de Nederlandse natuur verdwijnen plantensoorten die afhankelijk zijn van bestuiving door insecten. Milieuwetenschapper Kaixuan Pan toont dat aan na analyse van 87 jaar aan metingen van meer dan 365.000 locaties. Verschillende media in binnen- en buitenland berichtten over de studieresultaten. Hieronder…

Promotor: Prof.dr. P.G.L. Klinkhamer, Co-Promotor: T.J. de Jong

De Leidse binnenstad hangt er vol mee: muurgedichten. Wie rondloopt, komt poëzie tegen in het Latijnse schrift, maar ook in schriften die voor de gemiddelde Leidenaar minder eenvoudig te begrijpen zijn. In een nieuwe serie video’s vertelt Tijmen Pronk hier meer over.

Does roadside management in the mid-west USA increase invertebrate diversity similar to practices in Europe?

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

Promotor: Prof.dr. E.F. Smets, Co-Promotor: L.W. Chatrou

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

Promotor: G.A. Persoon, Co-promotor: H.H. de Iongh

Alumni-activiteit, Lezing

Per toeval stuitte student Nederlandse taal en cultuur Evi Dijcks op een gedicht van een voor haar onbekend dichtgenootschap. Toen ook haar docente het genootschap niet kende, wisten ze dat dit een onderzoek waard zou zijn. In Trouw vertelt Evi over haar bijzondere ontdekking van een zeer exclusief…

Large carnivore population is globally declining as a result of the fragmentation of habitat, large prey depletion and retaliatory killing by pastoralists.

Control of infectious diseases poses continuous challenges for human health.

This thesis focuses on important life history traits and their trade-offs using two hexapod models. Particularly, the trade-off between immune defense and embryonic developmental speed is a central theme of this study.

Kies Neerlandistiek aan de Universiteit Leiden:

In recent decades, climate change has led to more frequent and severe drought events, causing serious consequences such as increased forest mortality and significant crop yield losses. Understanding how drought affects plants, especially economically important herbaceous species, is crucial for predicting…

Een kleine geschiedenis van het leven op aarde, verteld aan de hand van eilanden. Wat kunnen wij leren van deze werelden in miniatuur?

S.S. Kolipaka’s thesis questions and investigates the survival prospects of reintroduced tigers and their offspring’s in the human dominated landscape of Panna tiger reserve in India.

We hebben dierfaciliteiten voor verschillende proefdieren, die uiteraard allemaal aan de wettelijke eisen voldoen. We verzorgen de dieren zo goed mogelijk en onze verblijven voorzien de verschillende diersoorten zo goed mogelijk in hun specifieke behoeften.

Cholesterol influences many pathways, including serving as precursor for adrenal steroidogenesis. Imbalance of cholesterol levels has been implicated in several diseases including cardiovascular diseases and its underlying pathology, atherosclerosis.

The PID-directed shift in PIN polarity has been broadly accepted as one of the essential mechanisms for the regulation of auxin transport polarity.