Appressorium vs. Haustorium

Appressoriumnoun

(mycology) A bulbous formation produced by parasitic fungi that is well attached to the cuticle of the host and from where a peg-shaped hypha is formed that penetrates the cuticle.

Haustoriumnoun

A root of a parasitic plant modified to take nourishment from its host.

Appressorium

An appressorium is a specialized cell typical of many fungal plant pathogens that is used to infect host plants. It is a flattened, hyphal organ, from which a minute infection peg grows and enters the host, using turgor pressure capable of punching through even Mylar.Following spore attachment and germination on the host surface, the emerging germ tube perceives physical cues such as surface hardness and hydrophobicity, as well as chemical signals including wax monomers that trigger appressorium formation.

‘pressing’;

Haustoriumnoun

A cellular structure, growing into or around another structure to absorb water or nutrients, such as a cotyledon.

Haustoriumnoun

One of the suckerlike rootlets of such plants as the dodder and ivy.

Haustoriumnoun

a rootlike attachment in parasitic plants that penetrates and obtains food from the host

Haustorium

In botany and mycology, a haustorium (plural haustoria) is a rootlike structure that grows into or around another structure to absorb water or nutrients. For example, in mistletoe or members of the broomrape family, the structure penetrates the host's tissue and draws nutrients from it.