The germ tubes will grow to form the hyphae and fungal mycelia.
In lab, 20% of conidia form germ tubes by 48 hours after release from the ascus.
Two germ tubes may even form from the same spore, the second protruding from the opposite end of the cell.
The germ tubes either penetrate through the leaf or enter through a natural opening such as the stomata.
This process helps Blumeria recognize that it is on the correct host and directs growth of the germ tube.
Both ascospores and conidia germinate directly with a germ tube.
The development of appressoria then begins infection following the growth of a germ tube.
The most common are germ tubes which grow and develop into hyphae.
These settle and after five weeks produce germ tubes which elongate and branch to develop into new plants.
This germ tube will continue to grow into hyphae and eventually mycelia to colonize the area.