A protein of plant origin, globulin 11S is disclosed. It is characterised in that it is derived from the seeds of a plant culture species, expressed in the seeds and not in any vegetative tissue of the plant, and appearing rapidly during the early germination stages (impregnation) and the priming of seeds. It is useful in agriculture as a molecular marker for determining the seed germination stage and to monitor continuously the development of seed priming treatments.
