The 27-year-old, who is uncapped, has replaced 18-year-old centre Gael Fickou, who has been ruled out of the tournament with an ankle injury.
Plante, who has been with Perpignan since 2006, has been recognised at youth level, but is yet to make his full bow for his home nation.
Philippe Saint-Andre's squad currently stands at 33, but 10 will be omitted before the opening clash against Italy.
Squad in full:
Forwards: Debaty, Domingo, Forestier, Kayser, Guirado, Szarzewski, Attoub, Ducalcon, Mas, Maestri, Pape, Suta, Taofifenua, Chouly, Dusautoir, Laurey, Nyanga, Ouedraogo, Picamoles
Backs: Machenaud, Parra, Michalak, Trinh-Duc, Bastareaud, Buttin, Clerc, Dulin, Fall, Plante, Fofana, Fritz, Huget, Mermoz