Pythiaceae
| Pythiaceae | |
|---|---|
| Water mould - Phytophthora forms: A: Sporangia. B: Zoospore. C: Chlamydospore. D: Oospore | |
| Scientific classification | |
| Domain: | Eukaryota |
| Clade: | Sar |
| Clade: | Stramenopiles |
| Clade: | Pseudofungi |
| Class: | Oomycetes |
| Order: | Peronosporales |
| Family: | J. Schröt., 1893 |
| Type genus | |
| Pythium Pringsh., 1858
| |
| Genera | |
| |
Pythiaceae is a family of oomycetes. The family includes serious plant and animal pathogens in the genus Pythium. The family was circumscribed by German mycologist Joseph Schröter in 1893.
Lifecycle
- Live on land (terrestrial), and in water (aquatic), or a combination of the two (amphibious).
- Most are deadly parasites, causing root rot and damping off on plants and pythiosis on animals.
- The diploid (2N) life stage predominates, with a short haplophase initiated during sexual reproduction before the fusion of the gametes. Most species are homothallic.
Reproduction
The sporangia may germinate via a germ tube or by release of motile zoospores, depending on the species and the environmental conditions.
Economic importance
Some Pythium species cause "damping off" diseases in young plants (seedlings).
References
- C.J. Alexopolous, Charles W. Mims, M. Blackwell et al., Introductory Mycology, 4th ed. (John Wiley and Sons, Hoboken NJ, 2004) ISBN 0-471-52229-5