translate English to French: Dictyosome-derived vesicles were active in the formation of the contact zone, during oogonial expansion and wall thickening, and during extension of the fertilization tube.
Des vésicules provenant du dictyosome interviennent dans la formation de la zone de contact, pendant l'expansion de l'oogone et l'épaississement de la paroi, ainsi que pendant l'élongation du tube de fertilisation.