- Partenaires INRAE
- Partenaires IRSTEA
- Peking University [Beijing]
- Penn State System
- Pennsylvania State University
- People's Friendship University of Russia [Moscow] = Rossijskij universitet družby narodov [Moskva]
- Philipps Universität Marburg = Philipps University of Marburg
- Philipps University
- Physiologie Cellulaire Végétale
- Piazza Università
- Plantes et systèmes de culture horticoles
- Potsdam Institute for Climate Impact Research
- Poznan University of Life Sciences
- Poznan University of Life Sciences (Uniwersytet Przyrodniczy w Poznaniu)
- Princeton University
- Provincia Autonoma di Bolzano, Agenzia per l'Ambiente
- Purdue University [West Lafayette]