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Oomycete
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The oomycetes, or Oomycota, form a distinct phylogenetic lineage of fungus-like eukaryotic microorganisms within the Stramenopiles. They are filamentous and heterotrophic, and can reproduce both sexua
Sexual structures (only oogonia, antheridia not shown) of Saprolegnia.[citation needed]
Sexual structures (only oogonia, antheridia not shown) of Saprolegnia.[citation needed]
Pythium sp. (Peronosporales), which causes pythiosis in animals, under microscope.
Pythium sp. (Peronosporales), which causes pythiosis in animals, under microscope.
Symptom of late blight (P. infestans, Peronosporales) on the underside of a potato leaf.
Symptom of late blight (P. infestans, Peronosporales) on the underside of a potato leaf.
Albugo candida (Albuginales) on shepherd's purse (Capsella bursa-pastoris, Brassicales).
Albugo candida (Albuginales) on shepherd's purse (Capsella bursa-pastoris, Brassicales).
Stramenopile
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The stramenopiles, also called heterokonts, are protists distinguished by the presence of stiff tripartite external hairs. In most species, the hairs are attached to flagella, in some they are attache
Electron micrograph of the protist Paraphysomonas butcheri. It illustrates the stramenopile property of having stiff hairs. The hairs attach to one longer flagellum, the other is without hairs. The body is coated with delicate scales. Paraphysomonas feeds on bacteria, two of which lie near the hairy flagellum.
Electron micrograph of the protist Paraphysomonas butcheri. It illustrates the stramenopile property of having stiff hairs. The hairs attach to one lo
Two living C. roenbergensis. Light micrograph. The cells are about 6 µm long. The anterior flagellum beats with an undulating pattern, the posterior (
Two living C. roenbergensis. Light micrograph. The cells are about 6 µm long. The anterior flagellum beats with an undulating pattern, the posterior (recurrent or smooth) flagellum usually holds the cell to the substrate.
Giant kelp, Macrocystis pyrifera, an example of a multicellular stramenopile, is a large seaweed, up to 45 metres (150 feet) long, in the Phaeophyceae
Giant kelp, Macrocystis pyrifera, an example of a multicellular stramenopile, is a large seaweed, up to 45 metres (150 feet) long, in the Phaeophyceae, within the Gyrista.