Research aims: Identification of key genes involved in programming the cellular architecture of A. niger & Genetic engineering of A. niger in order to improve its secretory capacities and rheological behavior under industrial fermentation conditions.

What are the functions of autophagy in the filamentous fungus Aspergillus niger?

We aim to develop A. niger strains that produce more starch degrading enzymes even in the absence of starch.

This project aims to further understand the molecular details related to the biosynthesis and function of Galf containing glycoconjugates in fungal Aspergillus spp.

This functional genomics project aims at understanding the biology of the underlying mycelium differentiation and autolysis processes in much more detail.

This project intends to provide the required knowledgebase for the design of novel mild intervention protocols to prevent fungal food spoilage.

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

Almost all bacteria are enveloped by a cell wall that provides cellular protection.

Promotors: Prof.dr. P.J. Punt, Prof.dr. C.A.M.J.J. van den Hondel

Can we develop new enzymes and cell factories to upgrade current enzyme cocktails towards complete degradation of biomass?

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

How presence, abundance and enzymatic activities of AM and EM fungi differently affect soil carbon sequestration processes?

Can a new proteomics workflow be developed to link genes and gene clusters to bioactive molecules, identify novel compounds and enhance the production in the Streptomyces lividans enzyme?

Ebru Alazi ‘hacked’ an enzyme-producing system in the fungus Aspergillus niger in order to produce renewable energy more easily. She manipulated the fungus, making it produce more pectinases: enzymes mainly used in the food industry and in the production of renewable energy, such as biofuels. Promotion…

Beautiful microscopic specimens play the leading role in the course 'Biodiversity Plant' for first-year Biology students. Normally these are put back in storage right after the course. But not this year!

A special relationship between plants and fungi, which plays an important role in carbon storage in soil, has the potential to slow down climate change. However, the amount of carbon stored in soil is decreasing as a result of human activity. This is what researchers say in a publication in Nature Communications.…

The research is aimed at development of an efficient gene targeting method that allows controlled integration of DNA at a preselected site in the Trichoderma genome.

Fungi living in vanilla plants play a role in the development of the taste and smell of vanilla, according to Shahnoo Khoyratty of the Institute of Biology Leiden. PhD defence on 27 October.

Students searched for a student project about mycorrhizal fungi and soil aggregation

In the research programme Microbial Sciences we perform state-of-the-art research in the field of biotechnology and microbial sciences.

What are the global relationships between environmental conditions and abundance of distinct types of mycorrhizal fungi in soil and plant roots?

Leiden researchers have compiled information collected by scientists over the past 120 years into a database of plant-fungal interactions. This important biological data is now freely available for researchers and nature conservationists. Publication in New Phytologist.

Promotores: Prof.dr. H. van Veen & Prof.dr. W. de Boer (Wageningen University)

Promotor: Prof.dr. E.F. Smets, Co-promotor: Dr. V.S.F.T. Merckx

PhD Defence

Remko Offringa, Associate Professor in Plant Developmental Genetics, and Associate Professor in Molecular Microbiology Arthur Ram both have been appointed as the new Directors of Education at the IBL. Offringa in the role as Director of Education for the Master program and Ram as Director for the Bachelor…

On 19 April, CML researcher Nadia Soudzilovskaia gave an invited talk at The Global Biodiversity Information Facility (GBIF) about her VIDI-funded work on impacts of mycorrhizas on ecosystem functioning. During this project she will closely collaborate with GBIF colleagues.

PhD Defence

Nadia Soudzilovskaia (CML), Martijn Bezemer (IBL / NIOO) and Harrie van der Hagen (ecologist at Dunea) gave an interview to NPO1 Radio about the TERRA-Dunes project.

On 11 May 2016 a prestigious NWO Vidi grant (NWO's Innovation Research Incentives scheme) has been awarded to Nadia Soudzilovskaia for her research proposal entitled “Do mycorrhizal fungi mediate soil carbon fate?”, aimed to understand mycorrhizal impact on soil carbon sequestration.

The filamentous bacteria Streptomyces are widespread inhabitants of terrestrial soils.

Promotor: G.P. van Wezel

Pectin is a plant cell wall polysaccharide made of mainly D-galacturonic acid (GA) subunits. The potency of the filamentous fungus Aspergillus niger to naturally secrete high amounts of pectinases to degrade pectin has been utilized for the industrial production of pectinases.

The soil-dwelling, filamentous bacteria of the genus Streptomyces are renowned for their production of useful secondary metabolites including antibiotics. The work described in this thesis provides new insights on the role and regulation of antibiotic production and resistance in these bacteria.

Streptomyces are filamentous bacteria that produce more than two-thirds of known antibiotics.

We investigate bacteria and fungi to understand their malicious or beneficial impact on food crops and their pathogenic or antibiotic role in human health.

Hot astrophysical plasma is ubiquitous in the Universe, from comets in our Solar system to the largest scale structures -- the cosmic web filaments. These hot plasmas, with the temperature of a few millions of degrees, are often observed in the X-ray wavelength range.

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.

We aim to unravel the molecular mechanisms involved in the transformation of eukaryotic cells by Agrobacterium.

How can cell wall engineering approaches be used to improve streptomycetes for industry to make new antibiotics?

The CMCB comprises research groups from the Institute of Biology Leiden (IBL), the Leiden Institute of Chemistry (LIC) and the Leiden University Medical Center (LUMC).

Microbial Sciences' contribution to the Host-Microbe Interactions research theme is to investigate how beneficial or disease-causing microbes associate and interact with their host.

Lecture

Utilization of plant-originated products as new antibiotics

PhD Defence

Bacteria are highly complex and diverse organisms that have adapted to survive in ecological niches ranging from the most extreme to the most heterogeneous environments.

Promotor: G.P. van Wezel, Co-promotor: D. Claessen

Bacteria have the ability to alter their morphology in order to adapt to changing environments.