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Oocystaceae
Oocystaceae is a family (biology), family of green algae, in the class Trebouxiophyceae. Molecular phylogenetic studies mostly (but not always) place the family in the order Chlorellales, as sister to Chlorellaceae. The Type (biology), type genus is ''Oocystis''. Members of Oocystaceae are common microalgae in freshwater habitats, and a few occur in semi-saline. Description Members of the family Oocystaceae consist of cells which are solitary or found in colonies of 2, 4, 8, 16, or more. Cells are typically oval to ellipsoidal, sometimes spherical, rhomboid, spindle-shaped or lemon-shaped. Cells, when colonial, may be arranged into coenobium (morphology), coenobia or pseudofilaments. Cells contain multiple chloroplasts of varying morphology—usually parietal, sometimes radial or spongiform, and with or without a pyrenoid. The cell wall is multilayered, often thickened at the poles, and may be smooth, warty or covered in spines. A uniting ultrastructural feature of all members o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oocystis
''Oocystis'' is a planktonic genus of mostly freshwater green algae of the Family (biology), family Oocystaceae. It is the type genus of its family. ''Oocystis'' is mostly found in freshwater habitats and has a cosmopolitan distribution. A few species are found in terrestrial, such as wet rocks, or in marine waters. Description ''Oocystis'' is solitary or borne in colonies of two, four or eight surrounded in a thin mucilaginous envelope or mother cell wall. The colony is up to 77 μm in diameter and oval to ellipsoid. Individual cells may be fusiform, ellipsoidal, oval or nearly spherical, 7–46 μm long. The cell wall is smooth but may be thickened at the poles. Cells contain one to many parietal chloroplasts. Asexual reproduction occurs by the formation of two, four or eight autospores which are released by the rupture of the parental cell wall. Sexual reproduction and flagellated stages have not been observed in this genus. Taxonomy The taxonomy of ''Oocystis'' is difficult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorellales
The Chlorellales are an order of green algae in the class Trebouxiophyceae. The Chlorellales include mostly freshwater or terrestrial (rarely marine), coccoid algae. Molecular phylogenetic studies mostly tend to find Chlorellales to consist of two sister clades, corresponding to Chlorellaceae and Oocystaceae; however, in some studies the two are not sister to each other, making Chlorellales not monophyletic. Genera of uncertain placement include: *'' Ankistrodesmopsis'' *'' Edaphochloris'' *''Picochlorum ''Picochlorum'' is a genus of green algae in the class Trebouxiophyceae. , AlgaeBase regarded the name as illegitimate Legitimacy, in traditional Western common law, is the status of a child born to parents who are legally married to each ot ...'' *'' Uvulifera'' References Chlorophyta orders {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphikrikos
''Amphikrikos'' is a genus of algae in the family Oocystaceae.See the NCBIbr>webpage on Amphikrikos Data extracted from the It is found in freshwater and has been reported from most continents. ''Amphikrikos'' consists of solitary, planktonic cells about 3–13 μm long and 2–9 μm wide. Cells are barrel-shaped, cylindrical, ellipsoid or broadly oval, with rounded poles. The cell may be surrounded by a thin, structureless mucilage layer. The cell wall is smooth, or covered with dark-brown incrustations on the surface which appear as granules or ribs, mainly near the equator and poles of the cell. Cells contain one (or two) chloroplasts, which is/are parietal and may have or lack a pyrenoid. Asexual reproduction occurs by the formation of typically four (rarely 2 or 8) autospore Autospores are a type of spores that are produced by algae to enable asexual reproduction and spread. They are non-motile and non-Flagellated cell, flagellated Aplanospore, aplanospores that are gener ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crucigeniella
''Crucigeniella'' is a genus of green algae in the family Oocystaceae.See the NCBI The National Center for Biotechnology Information (NCBI) is part of the National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The NCBI is loca ...br>webpage on Crucigeniella Data extracted from the References Trebouxiophyceae genera Freshwater algae Oocystaceae {{green algae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorellaceae
Chlorellaceae are a family of green algae in the order Chlorellales. About 250 species are currently accepted in the family. Members of the family are distributed worldwide and are common in a variety of freshwater, terrestrial and marine environments. Members of the family Chlorellaceae are important ecologically, mainly as primary producers. Algae such as ''Chlorella'' are important model organisms for plant physiology and biochemistry, because of they are easy to cultivate and grow rapidly. Additionally, many members are rich in lipids, carbohydrates and vitamins, making them of interest in the field of biotechnology. Meanwhile, genera such as '' Prototheca'' are of clinical significance as pathogens of humans and other animals. Description Members of Chlorellaceae are morphologically diverse and include solitary and colonial forms. Traditionally, the family was circumscribed based on the mode of reproduction (production of autospores), and the family was defined around the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetic
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to determine the processes by which diversity among species has been achieved. The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree. Molecular phylogenetics is one aspect of molecular systematics, a broader term that also includes the use of molecular data in taxonomy and biogeography. Molecular phylogenetics and molecular evolution correlate. Molecular evolution is the process of selective changes (mutations) at a molecular level (genes, proteins, etc.) throughout various branches in the tree of life (evolution). Molecular phylogenetics makes inferences of the evolutionary relationships that arise due to molecular evolution and results in the construction of a phylogenetic tree. History The theoretical fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
