Appressorium

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An appressorium is a flattened, hyphal "pressing" organ, from which a minute infection peg grows and enters the host, using turgor pressure capable of punching through even mylar.

Fungi that exhibit appressorial formation include the necrotroph Pyrenophora teres.

References

• C.J. Alexopolous, Charles W. Mims, M. Blackwell et al., Introductory Mycology, 4^th ed. (John Wiley and Sons, Hoboken NJ, 2004) ISBN 0-471-52229-5