The seeds chimiopriming by silicon: An effective method at the service of agriculture to improve drought tolerance Water stress is one of the most restrictive abiotic stresses having harmful effects on plants, which appear both at the morphological and physiological levels, hence the need to improve tolerance to this factor. Thus, researchers are trying to develop effective approaches to improve plant production. In this sense, the use of silicon (Si) has attracted the attention of several researchers, since it is considered one of the most known elements to have beneficial effects in modern agriculture. Numerous studies have shown that it can positively influence plant growth and yield, and especially improve their resistance to abiotic and biotic stresses. But this phytostimulator can also be applied as an agent in chemopriming, priming being a method of pre-treatment of seeds allowing a synchronization of germination, a better growth and tolerance to abiotic stresses. The objective of this work is to study the effect of chemopriming of seeds with silicon on the behavior of Trigonella foenum-graecum L. plants (fenugreek) derived from these seeds and subjected to water stress, by stopping watering. Several biometric, physiological and biochemical parameters, and particularly those related to oxidative stress, were measured. According to the results obtained, chemopriming with silicon mitigated the negative effects of stress. Compared to the stressed seedlings, this attenuation was observed through an improvement of growth and development as well as structural stability of the membranes. The different pretreatments allowed us to conclude that the ameliorative effects induced by chemopriming were not due to the imbibition alone, the rehydration effect alone or the silicon effect alone. On the other hand, it seems that Si cancels the effect of hydropriming.