Plant Biol. ISI Document Delivery No.: AE5RI Times Cited: 1 Cited Reference Count: 35 Kittang, A. -I. Iversen, T. -H. Fossum, K. R. Mazars, C. Carnero-Diaz, E. Boucheron-Dubuisson, E. Le Disquet, I. Legue, V. Herranz, R. Pereda-Loth, V. Medina, F. J. French Space Agency (CNES); Norwegian Research Council; Spanish National Plan for Research, Development and Innovation; ELIPS Programme of the European Space Agency (ESA); ESA We thank Prof. John Z. Kiss (University of Mississippi, USA), Prof. Gerald Perbal (University P. and M. Curie, France) and Dr. Imara Y. Perera (North Carolina State University, USA) for their contribution to some parts of this article. Experimental work reported in this paper and performed in the authors' laboratories was supported by the French Space Agency (CNES), the Norwegian Research Council, the Spanish National Plan for Research, Development and Innovation (different grants) and the ELIPS Programme of the European Space Agency (ESA). Specifically, the activities related to the 'Arabidopsis Topical team' were supported by an ESA grant. Wiley-blackwell Hoboken ; Space experiments provide a unique opportunity to advance our knowledge of how plants respond to the space environment, and specifically to the absence of gravity. The European Modular Cultivation System (EMCS) has been designed as a dedicated facility to improve and standardise plant growth in the International Space Station (ISS). The EMCS is equipped with two centrifuges to perform experiments in microgravity and with variable gravity levels up to 2.0g. Seven experiments have been performed since the EMCS was operational on the ISS. The objectives of these experiments aimed to elucidate phototropic responses (experiments TROPI-1 and -2), root gravitropic sensing (GRAVI-1), circumnutation (MULTIGEN-1), cell wall dynamics and gravity resistance (Cell wall/Resist wall), proteomic identification of signalling players (GENARA-A) and mechanism of InsP(3) signalling (Plant signalling). The role of light in cell proliferation and plant development in the absence of gravity is being analysed in an on-going experiment (Seedling growth). Based on the lessons learned from the acquired experience, three preselected ISS experiments have been merged and implemented as a single project (Plant development) to study early phases of seedling development. A Topical Team initiated by European Space Agency (ESA), involving experienced scientists on Arabidopsis space research experiments, aims at establishing a coordinated, long-term scientific strategy to understand the role of gravity in Arabidopsis growth and development using already existing or planned new hardware.