The pathogen is the white ball on the right, and it's using a germ tube to drill into a potato plant leaf.
From the sciencedaily.com
F. graminearum also appears to rely on choline as a chemical cue to send a germ tube into the anthers'tissues.
From the sciencedaily.com
Spores have a germ pore, a flattened area in the center of the spore surface through which a germ tube may emerge.
From the en.wikipedia.org
The tip of the germ tube divides to form an octant of cells, and the first rhizoid grows as an extension of the original germ cell.
From the en.wikipedia.org
In most species, there is a single cell inside the spore, and a slender extension of this cell called the germ tube germinates from the proximal side of the spore.
From the en.wikipedia.org
The tube is thus hermetically sealed and nearly germ-free due to the high temperatures during the production process.
From the en.wikipedia.org
The new technique relies on culture techniques developed by the Japanese team to grow male germ cells and turn them into sperm in the test tube.