Appressorium

The term appressorium (plural: appressorium ) or adhesive disc is used in biology for different structures or organs that can close to other objects or living beings, in particular:

The adhesive disks spread at the tip of the germ tubes of mushrooms . They serve to be able to attach to plant surfaces. These also act as a nutrient reservoir for the pathogen. In the mechanical penetration of the infectious hypha , the appressorias serve as an abutment to enable the high pressures of up to 7at that sometimes occur.

Fungal hyphae in the thallus of some types of lichen that cling closely to algae cells.

Parthenocissus tricuspidata adhesive discs

Attachment structures on the tendrils of some climbing plants , such as the adhesive discs of Parthenocissus (wild wine).

Adhesive structures on the fingers of some frogs .

Individual evidence

^ Johannes Hallmann , Andrea Quadt-Hallmann, Andreas von Tiedemann: Phytomedizin. (Basic knowledge Bachelor) (= UTB. Agricultural Sciences, Horticultural Sciences, Forest Sciences, Biology 2863). Ulmer, Stuttgart 2007, ISBN 978-3-8252-2863-7 .
↑ Herder Lexicon of Biology. Volume 1: A to Bilzingsleben. Spektrum Akademischer Verlag, Heidelberg et al. 1994, ISBN 3-86025-156-2 , p. 179.
^ Dietrich von Denffer , H. Ziegler, F. Ehrendorfer, A. Bresinsky: Strasburger . Textbook of botany for universities. 32nd edition. G. Fischer, Stuttgart et al. 1983, ISBN 3-437-20295-2 , p. 203.

[1] Johannes Hallmann , Andrea Quadt-Hallmann, Andreas von Tiedemann: Phytomedizin. (Basic knowledge Bachelor) (= UTB. Agricultural Sciences, Horticultural Sciences, Forest Sciences, Biology 2863). Ulmer, Stuttgart 2007, ISBN 978-3-8252-2863-7 .

[2] Herder Lexicon of Biology. Volume 1: A to Bilzingsleben. Spektrum Akademischer Verlag, Heidelberg et al. 1994, ISBN 3-86025-156-2 , p. 179.

[3] Dietrich von Denffer , H. Ziegler, F. Ehrendorfer, A. Bresinsky: Strasburger . Textbook of botany for universities. 32nd edition. G. Fischer, Stuttgart et al. 1983, ISBN 3-437-20295-2 , p. 203.