The 18th edition of SIP will be organised by Caroline Mueller at the University of Bielefeld, Germany. The 17th Symposium on Insect-Plant relationships in Leiden has been held online from the 25th to the 30th of July 2021.

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.

What are trait-trait relationships in wetlands? To what extent the so-called leaf economics traits deviate from terrestrial ecosystems? How traits specific to wetland plant relate to plant strategies? What’s the relationship between wetland plant traits to the ecosystem functioning (e.g. productivity,…

Science, Institute of Biology Leiden (IBL)

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

How and why latex bearing plants select specific chemical compounds for eco-chemical interactions with its biotic factors?

Education in (Chinese) Medicinal Plants associated to the Hortus botanicus in Leiden - Which Traditional Chinese Medicinal plants can be grown in the Hortus? - Establishing of a database which Chinese medical plants are available in Dutch Botanical Gardens - Data validation (correct identification,…

Mechanical forces are known to play an important role in bacterial colonies. In this dissertation, we study the self-organization at various stages of growing bacterial colonies, and focus on the mechanical effects of cell growth.

- How to deconvolute metabolic mixture of precursors and products by biontransformation? - How to optimize the reaction conditions to produce bioactive compounds in biotransformation? - What is the effect of co-treating fungi or bacteria for biotransformations?

Leiden and Austrian researchers have succeeded in further uncovering how a plant cell passes on the growth hormone auxin in a directional manner to the next cell. Three proteins that cling together in a bunch appear to be essential for this important transport process. ‘This discovery solves a crucial…

The availability of complete plant genome sequences together with the ever increasing amount of data on the molecular, cellular and physiological mechanisms of plant development require mathematical and computational models to obtain a complete overview of and generate new insights into the quantitative…

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

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

Identification and characterization of components of DNA repair pathways and their role in Agrobacterium T-DNA integration and repair of CRISPR/Cas induced DSBs.

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

In this project, we will study the genetic and environmental drivers of woodiness and stem lignification at the level of plant‐to‐gene‐to‐molecule.

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

Actinobacteria are Gram-positive bacteria that have a complex multicellular life cycle and are well known for their ability to produce a wide range of bioactive natural products (NPs).

Science, Institute of Biology Leiden (IBL)

Exhibition

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

This thesis presents the results of a study on the interfaces of insulating oxides with and without the insertion of a magnetic layer.

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.

How are interests embedded and experienced in daily life and to what extent can their origin and development be understood in terms of this contextualization?

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

As a new vision on food production, the feasibility study on LED light to grow crops with the biological- and chemical evaluation of final products.

Just like us, plants also produce growth hormones, and they also go through an ageing process. The study of the genes and mechanisms behind these processes is useful not only for crop breeding and agriculture, but also for medical research. That is the view held by Professor of Plant Developmental Genetics…

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

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

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

Promotor: J.W.M. Frenken

Do large deletions represent a risk during CRISP/CAS9-mediated genome editing in plants?

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

We examine how soil inoculation influences aboveground organisms (i) directly, and indirectly via (ii) its effects on plant chemistry or volatile emission, or via (iii) mediating the effects of belowground pathogens on aboveground organisms via the shared plant.

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

Growth hormone profiles are pulsatile and highly variable between individuals, limiting the implementation of mathemathical models to quantify an individual's secretion.

Emeritus Professor Ben Lugtenberg edited a book on “Principles of Plant-Microbe Interactions” together with Paul Hooykaas, Eddy van der Meijden and Jos Raaijmakers, all from the IBL.

The aim of this PhD dissertation is to explore the link between foreign investment and macroeconomic performance in the context of a colonial economic structure in Indonesia between c. 1910 and c. 1960.

Promotors: Prof.dr. P.G.L. Klinkhamer, Prof.dr. P.M. Brakefield

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

Science, Institute of Biology Leiden (IBL)

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

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

Plants love favourable microbes such as bacteria and fungi: they grow better and become healthier. Jos Raaijmakers, Professor of Microbial Ecology, is in search of the right microbes to be used in agriculture. Inaugural lecture 13 November.

Promotor: Prof.dr. J. Memelink

How were the Russians, under early modern conditions, able to incorporate this distant, undeveloped and, because frequent nomadic attacks, dangerous territory? And what role did the Kolyvan-Voskresensk plants play in this process?

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

The disappearance and reappearance of species of plants in the Netherlands is a normal phenomenon. In the period from 1981-2000 the number of plants to have disappeared was considerably lower than previously, whereas the number of species rediscovered is much higher. Climate change may be the cause.

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…