The penetration of sunflower root tissues by the parasitic plant Orobanche cumana is intracellular

Key message Combination of in vivo confocal, large field and transmission electron microscopy approaches revealed how intimate the relationship between the parasitic plant broomrape ( Orobanche cumana Wallr.) and its sunflower host ( Helianthus annus L.) is at very early stages of their interaction. ### Competing Interest Statement The authors have declared no competing interest.