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

Promotores: Prof.dr. W.J.G.M. Peijnenburg & Dr. M.G. Vijver

The studies described in this thesis deal with glycosidases, in particular alpha-galactosidases.

Promotor: C.A.M.J.J. van den Hondel, Co-promotor: Sandra de Weert

Promotor: P.G.L. Klinkhamer, Co-Promotores: K. Vrieling, P.P.J. Mulder

What is the effect of light at night on plant phenology and physiology, and how does this affect plant interactions with other species?

Plastics have become an integral part of modern society due to their versatility and durability.

Promotores: Prof.dr. T.H.W. Bäck, Prof.dr. M. Bongards (Cologne University)

The soil ecosystem consists of the largest reservoir of biodiversity on Earth.

Plants produce an astonishing variety of secondary metabolites (SMs) which are thought to play vital roles in the fitness of plants through ecological interactions.

Promotor: E.F. Smets, Co-promotor: T.R. van Andel

This thesis investigates the relations between metabolism and anatomy through the use of Magnetic Resonance Imaging (MRI).

The AT-Hook Nuclear Localized 15 (AHL15) gene belongs to a plant-specific gene family of DNA-binding proteins. Overexpression of AHL15 in Arabidopsis thaliana delays developmental phase transitions whereas its loss of function causes a slight acceleration.

Promotor: Prof.dr. L.J. Slikkerveer

The different kinds of cultural perspectives on health and disease of the participants are related to their knowledge, beliefs, values and practices manifested in various forms of lifestyle in Indonesia. The cultural diversity of the population is also related to differences in health behaviour.

Promotor: Erik F. Smets, Co-promotores: Barbara Gravendeel, Niels Raes

The Sundanese people, the largest ethnic group in West Java, have been using traditional medicine for a long time. Known as ubar kampung, Sundanese indigenous knowledge, beliefs and practices of traditional medicine are based on local people’s knowledge and use of Medicinal, Aromatic, and Cosmetic (MAC)…

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.

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

Mycoheterotrophy is a particular mode of life in which plants obtain carbohydrates from their associated fungal partners, instead of by using photosynthesis.

Promotores: P.G.L. Klinkhamer, P.M. Brakefield, Co-Promotor: M. Bruinsma

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…

Breeding for resistance becomes more and more important because we want to reduce the use of pesticides. A fast and cheap alternative can be to make use of morphological or chemical markers.

Soil is a home for an unbelievable diversity and abundance of microbial life that is essential for supporting life on our planet.

The rapidly increasing commercial application of metallic nanoparticles within products will inevitably enhance the amount of NPs being released into soil.

Promotor: Prof.dr. R. Verpoorte, Co-Promotor: Dr. Young Hae Choi

The RNA guided endonuclease based on the CRISPR/Cas system of Streptococcus pyogenus is a potent new tool for genome engineering in plants.

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

This thesis aims to investigate the effect of tripartite interaction between microbial inoculants, the plant, and herbivore insects on the rhizosphere microbiome and volatilome. We investigated the rhizosphere microbiome and volatilome of tomato plants exposed to insect herbivory and/or inoculated with…

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).

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,…

Promotor: E.F. Smets Co-promotor: J. Geml

Mycorrhizas are symbiotic associations between soil fungi and most plant species.

De afdeling Environmental Biology (CML-EB) houdt zich bezig met vraagstukken rondom biodiversiteit en natuurlijke hulpbronnen op het platteland in westerse en niet-westerse gebieden.

Increasing the efficiency of gene targeting (GT) as a genome editing tool in plants has been an important goal in plant biotechnology.

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.

A management strategy has been developed for field margins to reduce pesticide drift to non-target areas and to promote biodiversity on arable land. To this end, 3 and 6 m wide strips along the edges of winter wheat, sugar beet and potato crops have been left unsprayed with herbicides and insecticides…

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

Agrobacterium tumefaciens, a gram-negative plant pathogen belonging to the family Rhizobiaceae, is the causative agent of crown gall disease, which can affect many plant species including agronomically important ones.

The research provides insight into disease behavior in both rural and semi-urban areas in Serengeti in Tanzania.

Kijk regelmatig op deze pagina voor meer informatie over het vergroten van de biodiversiteit aan de Universiteit Leiden.

Promotor: P. J. J. Hooykaas Co-promotor: B. S de Pater

Promotor: Prof.dr. H.J.M de Groot, Co-Promotor: A. Alia

Projecten van de afdeling Environmental Biology

This thesis examines the impacts and challenges of water use of electric power system. This thesis found that there are large differences in water use of electricity technologies, with hydropower and thermal power being two large water users.

Light-Harvesting Complex II (LHCII) is responsible for light absorption and excitation energy transfer in plants and photosynthetic algae, while in high light it undergoes conformational changes by which it quenches excitations to prevent photodamage.

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

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