Is stramenopiles a genus?
Stramenopile is a clade of organisms distinguished by the presence of stiff tripartite external hairs. Stramenopiles are eukaryotes; since they are neither fungi, animals, nor plants, they are classified as protists. Most stramenopiles are single-celled, but some are multicellular algae including some brown algae.
What are the defining features of stramenopiles?
Stramenopiles. Stramenopiles (also known as heterokonts) usually have a flagellate stage in the life cycle that has a characteristic type of stiff tubular ‘hairs’ arranged in two rows on one flagellum (see Patterson, 1999). These flagellates swim in the direction the hair-bearing flagellum is pointing.
How do stramenopiles reproduce?
Asexual reproduction by means of binary fission, zoosporogenesis, sporogenesis etc. Isogamy to oogamy are known in the sexual reproduction of stramenopiles. Although stramenopiles usually show diplontic life cycle (opalinids, oomycetes, diatoms, Raphidophyceae), the life cycle of brown algae is veried.
What is meant by Heterokont?
/ (ˈhɛtərəʊˌkɒnt) / noun. any organism that possesses two flagella of unequal length. Heterokonts include diatoms and some other algae.
Are Coccolithophores stramenopiles?
The coccolithophores are sometimes considered members of the ‘golden algae’ group and some treatments lump ‘golden algae’ (haptophytes including coccolithophores and other groups), brown algae and diatoms together in a group called ‘Stramenopiles’, largely on the basis of pigments.
Are Heterokonts Photoautotrophs?
The heterokonts or stramenopiles are a major line of eukaryotes currently containing more than 100,000 known species. Most are algae, ranging from the giant multicellular kelp to the unicellular diatoms, which are a primary component of plankton….Heterokont.
| Heterokonts | |
|---|---|
| Phylum: | Heterokontophyta |
| Typical classes |
Are Oomycetes Stramenopiles?
They are a large group of protists (over 100,000 species) that include many previously classified as fungi, protozoa, or algae (such as diatoms and kelp). The oomycetes comprise the largest group of non-photosynthesizing stramenopiles. Oomycetes are diploid for most of their life cycle, fungi mainly haploid.
Are Coccolithophores Stramenopiles?
Are Oomycetes stramenopiles?
Is green algae a Stramenopile?
Stramenopiles include a particularly wide variety of algae with chlorophyll c-containing complex plastids (see above), which are often now known as ochrophytes.
Are heterokonts Photoautotrophs?
Are heterokonts multicellular?
Many heterokonts are unicellular flagellates, and most others produce flagellated cells at some point in their lifecycles, for instance as gametes or zoospores. The name heterokont now refers to the characteristic form of these cells, which typically have two unequal flagella.
What kind of organism is a stramenopile?
Stramenopiles are eukaryotes; since they are neither fungi, animals, nor plants, they are classified as protists. Most stramenopiles are single-celled, but some are multicellular algae including some brown algae.
How are the heterokonts similar to the Stramenopiles?
Thomas Cavalier-Smith treats the heterokonts as identical in composition with the stramenopiles; this is the definition followed here. He has proposed placing them in a separate kingdom, the Chromalveolata, together with the haptophytes, cryptomonads, and alveolates.
How did the stramenopile protist get its name?
Rather than continue to use a name whose meaning had changed over time and was hence ambiguous, the name ‘stramenopile’ was introduced to refer to the clade of protists that had tripartite stiff (usually flagellar) hairs and all their descendents.
When did the term stramenopile come into use?
The term ‘Stramenopile’ was introduced in 1989 by Patterson to overcome ambiguities that had (and continue to be) developed with the use of the term ‘heterokont’. Consequently, heterokonts may be referred to as stramenopiles. The term ‘heterokont’ first emerged in the context of 19th century phycology.