Oomycetes

Thesaurus

Noun

Oomycetes - nonphotosynthetic fungi that resemble algae and that reproduce by forming oospores; sometimes classified as protoctistsclass Oomycetesclass - (biology) a taxonomic group containing one or more ordersMastigomycota, Mastigomycotina, subdivision Mastigomycota, subdivision Mastigomycotina - fungi in which the spores and gametes are motile; in some systems placed in the Phycomycetes group with the Zygomycotaorder Saprolegniales, Saprolegniales - order of chiefly aquatic fungiorder Peronosporales, Peronosporales - order of chiefly parasitic lower fungi: Albuginaceae and Peronosporaceae and Pythiaceaefamily Plasmodiophoraceae, Plasmodiophoraceae - family of fungi often causing hypertrophy in seed plants

Oomycetes

enUK

Oomycetes

A class of fungi in the subdivision Mastigomycotina. They comprise a group of heterotropic, funguslike organisms that are classified with the zoosporic fungi (Mastigomycotina) but in reality are related to the heterokont algae. They are distinguished from other zoosporic fungi by the presence of biflagellate zoospores. Some taxa are nonzoosporic. Asexual reproduction involves the release of zoospores from sporangia; in some taxa the sporangium germinates with outgrowth of a germ tube. Sexual reproduction occurs when an oogonial cell is fertilized by contact with an antheridium, resulting in one or more oospores.

Oomycetes are cosmopolitan, occurring in fresh and salt water, in soil, and as terrestrial parasites of plants. Many species can be grown in pure culture on defined media. There are four orders: The Saprolegniales and Leptomitales are popularly known as water molds. Some species are destructive fish parasites. Many Lagenidiales are parasites of invertebrates and algae. The Peronosporales are primarily plant parasites attacking the root, stem, or leaf, and include some of the more destructive plant pathogens. See Eumycota, Fungi

Oomycetes

[‚ō·ə·mī′sēd·ēz] (mycology) A class of the Phycomycetes comprising the biflagellate water molds and downy mildews.

Oomycetes

Related to Oomycetes: Zygomycetes, Zygomycota, Phytophthora, Ascomycetes, Basidiomycetes

noun

Synonyms for Oomycetes

noun nonphotosynthetic fungi that resemble algae and that reproduce by forming oospores

Synonyms

class Oomycetes

Related Words

class
Mastigomycota
Mastigomycotina
subdivision Mastigomycota
subdivision Mastigomycotina
order Saprolegniales
Saprolegniales
order Peronosporales
Peronosporales
family Plasmodiophoraceae
Plasmodiophoraceae