Pythiaceae

Pythiaceae

Taxobox
color = #FA7B62
name = "Pythiaceae"


image_caption = Water mould - Phytophthora forms: A: Sporangia. B: Zoospore. C: Chlamydospore. D: Oospore
domain = Eukaryota
regnum = Chromalveolata
phylum = Heterokontophyta
classis = Oomycetes
ordo = Peronosporales
familia = Pythiaceae
subdivision_ranks = Genera
subdivision = 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.

*The diploid (2N) life stage predominates, with a short haplophase initiated during sexual reproduction as well as asexual reproduction (homothallism predominates in the Family) to fuse gametes.

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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  • family Pythiaceae — noun fungi having sporangia usually borne successively and singly at the tips of branching sporangiophores • Syn: ↑Pythiaceae • Hypernyms: ↑fungus family • Member Holonyms: ↑Peronosporales, ↑order Peronosporales …   Useful english dictionary

  • Peronosporales — noun order of chiefly parasitic lower fungi: Albuginaceae and Peronosporaceae and Pythiaceae • Syn: ↑order Peronosporales • Hypernyms: ↑fungus order • Member Holonyms: ↑Oomycetes, ↑class Oomycetes • …   Useful english dictionary

  • order Peronosporales — noun order of chiefly parasitic lower fungi: Albuginaceae and Peronosporaceae and Pythiaceae • Syn: ↑Peronosporales • Hypernyms: ↑fungus order • Member Holonyms: ↑Oomycetes, ↑class Oomycetes • Member Mero …   Useful english dictionary

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