| Occasionally a germ tube or immature appressorium is observed which suggests that f urther study is warranted. |
| The mechanical pressure exerted by the appressorium is generated from physiological processes that increase intracellular turgor by producing osmolytes such as glycerol. |
| Hyphae also can grow from one vessel member to another through perforated end walls as well as directly through secondary wall material by using an appressorium. |
| This structure, called an appressorium, then produces the probes that penetrate the plant tissue. |
| Some hyphae were also seen forming what appear to be an appressorium. |
