The Laboratory of Plant Physiology studies the (molecular) interaction of plants with their biotic and abiotic environment. We have four staff members with their own research line. Harro Bouwmeester?s group focusses on the terpenoids , particularly terpenoids that are involved in plant-plant and plant-insect signalling. One of the major activities concerns the strigolactones - germination stimulants of parasitic plants, host finding factor for arbuscular mycorrhizal fungi and recently discovered new class of plant hormones. Dick Vreugdenhil studies ?source-sink interactions?. In all aspects of their life cycle plants have to face the challenge to most efficiently acquire and use the available resources in order to best adopt to a continuously changing environment. This research focuses primarily on flexibility in primary (carbohydrate) metabolism and nutrient (N and P) use efficiency as related to growth and performance under optimal and sub-optimal conditions. Henk Hilhorst?s work is centred on a number of research themes in seed biology, but with a focus on the mechanism and regulation of dormancy and germination in relation to the (stressful) environment. He uses combined physiological, genetic and ?omics research strategies and systems biology approaches to dissect the relationship between seed genotype and phenotype. Sander van der Krol is a molecular physiologist and studies (sub)cellular processing and transport of proteins and metabolites. The latter in close collaboration with Harro Bouwmeester (transport and storage of terpenoids). Joint interests of the whole group are the use of genetics and metabolomics, the role of plant hormones in the plant?s response to the environment and modelling/systems biology approaches to plant physiology.