Unique Characteristics: Our example is a Trypanosoma ... Stramenopiles 1. Physical Characteristics. Many important photosynthesizers are stramenopiles and not all stramenopiles are single-celled. Hyphal architecture: Aseptate and coenocytic tubular hyphae Other articles where Stramenopiles is discussed: protozoan: Annotated classification: Stramenopiles Group consists of 4 heterotrophic clades and 15 predominantly autotrophic clades and contains many examples of secondarily-derived heterotrophs; in autotrophic groups, fucoxanthin is the dominant accessory pigment. General Characteristics and structures - members of this group include members that have flagellum with numerous fine, hair like projections. This flagellum beats out a water current which moves the … A ‘hairy’ flagellum is often paired with a shorter, smooth flagellum. A group of non-photosynthetic stramenopiles is the Oomycetes, and there are over 600 described species. Difference between Oomycetes and True Fungi (1). Simpson, Y. Eglit, in Encyclopedia of Evolutionary Biology, 2016. Ø Both groups undergo sexual reproduction. The Kareniaceae group within a clade consisting of haptophytes and stramenopiles, this clade is supported by unique sequence characteristics. Diatoms are a single-celled algae with a unique silicon-based cell wall. 2 In the petH phylogeny, at least 5 isoforms were recovered for Karenia. The unifying feature of this group is the presence of a textured, or “hairy,” flagellum. 2. Stramenopiles. These organisms share morphological characteristics with fungi, but phylogenetic analysis has shown that they are not closely related. Oomycetes: 1. Neighboring taxonomic group: Based on the phylogenetic analysis with 18S rRNA, oomycetes are more related to Heterokontae which contain diatoms and golden-brown algae 2. Microscopic and floating (about the size of a human red blood cell) Oval or elliptical shape, single cell alga; Has two hair-like short tails used for swimming and to attach to things, two saddle-shaped chloroplasts; Often blooms in large numbers The stramenopiles include the golden algae (Chrysophyta), the brown algae (Phaeophyta), and the diatoms (Bacillariophyta).Stramenopiles have chlorophyll a, chlorophyll c 1 /c 2, and fucoxanthin as photosynthetic pigments.Their storage carbohydrate is chrysolaminarin. While some lack cell walls, others have scales. The front flagellum has tiny, three-part forked brstles running along each side (called mastigonemes). Stramenopiles have two flagella of different length, one at the front of the cell, and one attached further back. This group of protists have flagella with many short hair-like structures along the length of the flagella. A.G.B. 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. Stramenopiles (Fig. Many stramenopiles also have an additional flagellum that lacks hair-like projections (Figure 9). The other subgroup of chromalveolates, the stramenopiles, includes photosynthetic marine algae and heterotrophic protists. Ø Both groups produce spores as a mode of reproduction. 3) are a remarkably diverse, monophyletic group that includes: planktonic diatoms, small single-celled or colonial freshwater protists (golden algae), large multicellular marine seaweeds (brown algae), and water molds, which include the pathogen responsible for the potato blight that drove millions of people in Ireland hungry in the nineteenth century. 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