Résumé : The increase in global population, reduction in cultivable land, and climate change areconstraining the production of sustainable food resources. Modern strategies employed toincrease the yield of cereal crops require the use of chemical fertilizers and pesticides and theselection of only the most profitable cereal species. Such strategies result in environmentalpollution and loss of biodiversity through the eutrophication of surrounding ecosystems.In response to these problems, the field of agricultural research has prioritized findingalternative and increasingly sustainable strategies to achieve a constant increase in crop yield.Therefore, the objective of this thesis is to investigate how the presence of Azolla filiculoidesaffects Oryza sativa growth and performance during rice-azolla co-cultivation. This projectencompasses an ecologically innovative way to improve the productivity of rice under resourcelimiting,sub-optimal environmental conditions. This study intends to unravel the interactionbetween rice and Azolla in order to identify the physiological mechanisms in rice that respondto Azolla co-cultivation.The experimentation focused specifically on comparing performance of rice plants grown inisolation with those co-cultivated with azolla. The experimental group consisted of a salinitytreatment to monitor the growth of the rice under suboptimal environmental conditions. Tounderstand how azolla affects rice growth, morphological and physiological data was acquiredthroughout the experiment. Furthermore, the data obtained will contribute to the growingliterature of urgent alternative and sustainable strategies to meet the yield increase of cerealcrops that is obligatory in a growing world.