Harro Bouwmeester is Chair of Plant Hormone Biology at the Swammerdam Institute for Life Sciences (SILS) of the University of Amsterdam, the Netherlands. The work in his group is multi-disciplinary and centered around signaling molecules and their role in the communication of plants with other organisms, such as parasitic plants, insects, nematodes and the microbiome. Topics that are studied are the discovery of new signaling relations using omics data, the importance of structural diversity in the signaling molecules for biological specificity - for which elucidation of biosynthesis and perception mechanisms are important – and the discovery of unknown roles of signaling molecules. Prof. Bouwmeester is member of the executive committee of Terpnet, president of the International Parasitic Plant Society (IPPS), member of the American Society for Plant Biologists (ASPB), member of the National Graduate School Experimental Plant Sciences. He reviews for >20 Journals such as Science, Nature Biotechnology, PNAS, New Phytologist, Plant Physiology, Frontiers in Plant Science, The Plant Journal, The Plant Cell, etc and for Granting agencies such as NSF, SSF, DFG, GIF, BARD, Israeli Ministry of Agriculture Fund, BBSRC, Agence National de la Recherche (ANR).