Resume.-Grace a un systeme de glandes digestives variees, les plantes carnivores sont capables d'assimiler les proies qu'elles capturent. L'activite hydrolytique responsable de Ia degradation des proies en nutriments absorbables est le fait d'enzymes secretees par Ia plante, mais aussi de micro-organismes provenant du milieu exterieur, dans certains cas. La secretion enzymatique est declenchee par divers stimuli bien definis chez certaines especes. Les mecanismes precis du transfer! et de !'excretion des enzymes ainsi que leur origine sont cependant imparfaitement connus chez ces vegetaux. Mots-des : glandes digestives-enzymes-secretion -stimuli.Abstract.-Thanks to various digestive glands, carnivorous plants are able to exploit trapped preys. Those are hydrolysed to absorbable nutrients by enzymes secreted by the plant itself or, in some cases, by micro-organisms. For a few species, the secretion of digestive juice occurs in response to various, clearly defined stimuli. However, the exact mechanisms of transfer and excretion of digestive enzymes, as well as their origin, need further research to become thoroughly understood.
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