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Research and teaching centre
environmental geosciences
Research and teaching centre
environmental geosciences


In the context of climate change mitigation and global food security, the storage of organic matter (and associated carbon) in soils is a major issue, which was reflected at COP21 in the international "4 by 1000" initiative. This initiative aims to show that agriculture, and in particular agricultural soils, can play a crucial role in food security and climate change.

While it is well established that increasing organic matter inputs is one of the major agro-ecological levers in terms of practices to be implemented, the levers concerning their maintenance in soils (stabilisation) have not been established to date.

The RhizoCarbone+ project, proposed jointly by BIAM and CEREGE, seeks to remove this barrier.

It has a twofold objective in the service of the environmental transition:

  • The objective research aims to test a cultivation practice in a Mediterranean soil, in the laboratory, that is highly favourable to C storage by combining the increase of C inputs by root exudates, their transformation into exopolysaccharides by bacteria and the stabilisation of this C by organo-mineral interactions. Such a challenge requires taking into account the central roles of soil microorganisms.


  • The objective training aims to offer an online course (Massive Open Online Course, MOOC) addressing the interdisciplinary complexity, both scientific and socio-environmental, of the "4 by 1000" objectives.

2021-2024: RhizoCarbone+ (in French)

Stimulating the plant-microorganism-mineral continuum to store carbon in soils

Financing: ITEM Institute

Head of CEREGE :
Isabelle Basile-Doelsch

Partner : 

  • CEA, CNRS, BIAM, LEMIRE, Ecologie Microbienne de la Rhizosphère, St-Paul-lez-Durance

Collaboration : 

  • GIEE wine cooperative Les Marquets
  • The winegrowers of Plan de la Tour, Var
  • CP2M, Aix-Marseille University