This thesis concerns the relocation of agricultural and food sectors in the PACA region through the development of short food chains (SFC) since the 2000s. SFC are a form of food commercialization organized according to a principle of geographical, social and economic proximity. The approach developed is focused on the dynamics of institutionalization of SFCs, which is observed by increasing positioning of government and the proliferation of organizations aiming to develop and structure these food systems. Proximity is defined as the principle of change implied by SFCs in terms of the spatial organization of agriculture and food sectors and in terms of the coordination of the actors. Through an empirical and inductive approach, these two aspects are studied dynamically (2000-2015) to observe their structural evolution in the PACA region. We describe territorial food system organization and the structural impact that urban demand has on these developing systems. Simultaneously, the emergence of regional food governance allows a decompartmentalization of agricultural stakeholders and civil society members. These two aspects emphasize the importance of the coordination of actors hroughout the relocation of agricultural and food sectors and specifically the emerging involvement of cities. Finally, this thesis also highlights patterns of exclusion accompanying this agricultural and food relocation resulting from localized competition (economic and spatial) between producers and the exclusion of specific SFCs following the development of models legitimized by the regional governance.