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Haptophyte
The haptophytes, classified either as the Haptophyta, Haptophytina or Prymnesiophyta (named for '' Prymnesium''), are a clade of algae. The names Haptophyceae or Prymnesiophyceae are sometimes used instead. This ending implies classification at the class rank rather than as a division. Although the phylogenetics of this group has become much better understood in recent years, there remains some dispute over which rank is most appropriate. Characteristics The chloroplasts are pigmented similarly to those of the heterokonts, but the structure of the rest of the cell is different, so it may be that they are a separate line whose chloroplasts are derived from similar red algal endosymbionts. Haptophyte chloroplasts contain chlorophylls a, c1, and c2 but lack chlorophyll b. For carotenoids, they have beta-, alpha-, and gamma- carotenes. Like diatoms and brown algae, they have also fucoxanthin, an oxidized isoprenoid derivative that is likely the most important driver of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroplast
A chloroplast () is a type of membrane-bound organelle, organelle known as a plastid that conducts photosynthesis mostly in plant cell, plant and algae, algal cells. Chloroplasts have a high concentration of chlorophyll pigments which capture the Radiant energy, energy from sunlight and convert it to chemical energy and release oxygen. The chemical energy created is then used to make sugar and other organic molecules from carbon dioxide in a process called the Calvin cycle. Chloroplasts carry out a number of other functions, including fatty acid synthesis, amino acid synthesis, and the immune response in plants. The number of chloroplasts per cell varies from one, in some unicellular algae, up to 100 in plants like ''Arabidopsis'' and wheat. Chloroplasts are highly dynamic—they circulate and are moved around within cells. Their behavior is strongly influenced by environmental factors like light color and intensity. Chloroplasts cannot be made anew by the plant cell and must ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rappephyceae
Rappephyceae, or Rappemonads, are a small family of protists first described in 2011, of uncertain phylogenic affinity. It has been discussed as a possible member of a larger clade Haptophyta. This newly identified taxonomic class of phytoplankton are named after a professor from the Hawai’i institute of marine biology, known as Michael Rappé. Rappé discovered these phytoplankton in the Atlantic Ocean and published his findings on their DNA in 1998. Current research has shown that these organisms provide an immense amount of nutritional molecules, such as oxygen, for other organisms using biochemical processes like photosynthesis and carbon fixation. Classification Rappephyceae belong to the Haptophyte clade. The haptophytes comprise around 500 marine algal species. One of the most novel characteristics of haptophytes is their calcite, or calcium carbonate, scales that cover the cell. These are also known as coccoliths and the whole organism can be referred to as a coccol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pavlovophyceae
: Pavlovaceae is a family of haptophytes. It is the only family in the order Pavlovales, which is the only order in the class Pavlovophyceae. It contains four genera, '' Diacronema'', '' Exanthemachrysis'', ''Pavlova'' and ''Rebecca''. Pavlovophyceae haptophytes also reportedly store photosynthetic carbon in paramylon polysaccharide granules (with a crystalline microfibrillar structure), unlike the chrysolaminarin Chrysolaminarin is a linear polymer of β(1→3) and β(1→6) linked glucose units in a ratio of 11:1. It used to be known as leucosin. Function Chrysolaminarin is a storage polysaccharide typically found in photosynthetic heterokonts. It is u ... used as the polysacharide storage form by most haptophytes. References Haptophyte families Haptista families {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pavlovales
: Pavlovaceae is a family (biology), family of haptophytes. It is the only family in the order Pavlovales, which is the only order in the class Pavlovophyceae. It contains four genera, ''Diacronema'', ''Exanthemachrysis'', ''Pavlova (alga), Pavlova'' and ''Rebecca (genus), Rebecca''. Pavlovophyceae haptophytes also reportedly store photosynthetic carbon in paramylon polysaccharide granules (with a crystalline microfibrillar structure), unlike the chrysolaminarin used as the polysacharide storage form by most haptophytes. References Haptophyte families Haptista families {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syracosphaerales
Syracosphaerales is an order of algae consisting of three families: * Calciosoleniaceae * Rhabdosphaeraceae * Syracosphaeraceae References Haptophyte orders {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coccolithales
Coccolithales is an order of Haptophyceae. The Coccolithales has long been considered one of only two orders in the Coccolithophyceae Prymnesiophyceae is a haptophyte class (biology), class. Although it was originally described by Siegfried Jost Casper, Casper in 1972, it did not receive a Latin diagnosis (a requirement for valid publication under the International Code of Bota ..., the other order being the Isochrysidales. References Haptophyte orders Haptista orders {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prymnesiophyceae
Prymnesiophyceae is a haptophyte class. Although it was originally described by Casper in 1972, it did not receive a Latin diagnosis (a requirement for valid publication under the International Code of Botanical Nomenclature The ''International Code of Nomenclature for algae, fungi, and plants'' (ICN or ICNafp) is the set of rules and recommendations dealing with the formal botanical names that are given to plants, fungi and a few other groups of organisms, all tho ...) until Hibberd provided one in 1976. References Haptophyte classes Haptista classes {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algae
Algae ( , ; : alga ) is an informal term for any organisms of a large and diverse group of photosynthesis, photosynthetic organisms that are not plants, and includes species from multiple distinct clades. Such organisms range from unicellular microalgae, such as cyanobacteria, ''Chlorella'', and diatoms, to multicellular macroalgae such as kelp or brown algae which may grow up to in length. Most algae are aquatic organisms and lack many of the distinct cell and tissue types, such as stomata, xylem, and phloem that are found in embryophyte, land plants. The largest and most complex marine algae are called seaweeds. In contrast, the most complex freshwater forms are the Charophyta, a Division (taxonomy), division of green algae which includes, for example, ''Spirogyra'' and stoneworts. Algae that are carried passively by water are plankton, specifically phytoplankton. Algae constitute a Polyphyly, polyphyletic group because they do not include a common ancestor, and although Eu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coccolithophyceae
Prymnesiophyceae is a haptophyte class (biology), class. Although it was originally described by Siegfried Jost Casper, Casper in 1972, it did not receive a Latin diagnosis (a requirement for valid publication under the International Code of Botanical Nomenclature) until David John Hibberd, Hibberd provided one in 1976. References Haptophyte classes Haptista classes {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prymnesium
''Prymnesium'' is a genus of haptophytes, including the species '' Prymnesium parvum''. The genus is a unicellular motile alga. It is ellipsoidal in shape one flagellum is straight and there are two longer ones which enable movement. The name Latinizes the Greek ' ‘cable (for mooring)’, from ' ‘stern’, from ' ‘hindmost’. ''Prymnesium'' was likely first recognized and drawn (although not named as such) on July 1, 1920, and then (seemingly independently) officially named shortly afterwards on July 6, 1920. Morphology Species The taxonomy of Prymnesiales Prymnesiales is an order of Haptophyceae. It currently consists of three families: * Prymnesiaceae * Chrysochromulinaceae * Chrysoculteraceae References Haptophyte orders Haptista orders {{Haptophyte-stub ... was revised in 2011. With this revision, ten additional species were added to the genus, namely '' P. neolepis'' (previously assigned to '' Hyalolithus''), '' P. palpebrale'', '' P. polylepis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coccolithus Pelagicus
''Coccolithus'' is a genus of unicellular haptophytes. Species The species in this genus include: *'' Coccolithus oceanicus'' *'' Coccolithus pelagicus'' *'' Coccolithus pliopelagicus'' References Haptophyte genera {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prymnesiales
Prymnesiales is an order of Haptophyceae. It currently consists of three families: * Prymnesiaceae * Chrysochromulinaceae * Chrysoculteraceae References Haptophyte orders Haptista orders {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
