Pythiaceae

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Pythiaceae
Water mould - Phytophthora forms: A: Sporangia. B: Zoospore. C: Chlamydospore. D: Oospore
Water mould - Phytophthora forms: A: Sporangia. B: Zoospore. C: Chlamydospore. D: Oospore
Scientific classification
Domain: Eukaryota
Kingdom: Chromalveolata
Phylum: Heterokontophyta
Class: Oomycetes
Order: Peronosporales
Family: Pythiaceae
Genera

See text.

Pythiaceae is family of water moulds. The family includes plant pathogenic fungus-like organisms in the genus Phytophthora; as well as serious plant and animal pathogens in the genus Pythium.

Lifecycle

  • Live on land (terrestrial), and in water (aquatic), and a combination of the two, (amphibious)
  • Live as deadly parasites, causing some serious plant and animal diseases when terrestrial.

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

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