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Nephrocytium Agardhianum
''Nephrocytium'' is a genus of green algae in the class Chlorophyceae. Formerly placed in the family Oocystaceae, it is currently placed in its own family, Nephrocytiaceae. Description ''Nephrocytium'' consists of colonies of 4, 8, or 16 asymmetrical cells surrounded by a spherical to ovoid layer of mucilage, which is formed when the mother cell wall expands and gelatinizes. Individual cells are kidney-shaped to ovoid, containing one chloroplast lining the inside of the cell membrane, each with one pyrenoid. Reproduction occurs Asexual reproduction, asexually. It exclusively forms autospores, and does not appear to have a flagellated stage in its life cycle. Identification Similar genera include ''Nephrochlamys'' and ''Juranyiella''; ''Nephrochlamys'' differs in having cells that lack pyrenoids, while ''Juranyiella'' has granules dotted on the cell wall surface. Species are distinguished mainly by the shape of the cells (particularly at their apices), cell sizes, and length-to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephrocytium Agardhianum
''Nephrocytium'' is a genus of green algae in the class Chlorophyceae. Formerly placed in the family Oocystaceae, it is currently placed in its own family, Nephrocytiaceae. Description ''Nephrocytium'' consists of colonies of 4, 8, or 16 asymmetrical cells surrounded by a spherical to ovoid layer of mucilage, which is formed when the mother cell wall expands and gelatinizes. Individual cells are kidney-shaped to ovoid, containing one chloroplast lining the inside of the cell membrane, each with one pyrenoid. Reproduction occurs Asexual reproduction, asexually. It exclusively forms autospores, and does not appear to have a flagellated stage in its life cycle. Identification Similar genera include ''Nephrochlamys'' and ''Juranyiella''; ''Nephrochlamys'' differs in having cells that lack pyrenoids, while ''Juranyiella'' has granules dotted on the cell wall surface. Species are distinguished mainly by the shape of the cells (particularly at their apices), cell sizes, and length-to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephrocytium Limneticum
''Nephrocytium'' is a genus of green algae in the class Chlorophyceae. Formerly placed in the family Oocystaceae, it is currently placed in its own family, Nephrocytiaceae. Description ''Nephrocytium'' consists of colonies of 4, 8, or 16 asymmetrical cells surrounded by a spherical to ovoid layer of mucilage, which is formed when the mother cell wall expands and gelatinizes. Individual cells are kidney-shaped to ovoid, containing one chloroplast A chloroplast () is a type of membrane-bound organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in ... lining the inside of the cell membrane, each with one pyrenoid. Reproduction occurs asexually. It exclusively forms autospores, and does not appear to have a flagellated stage in its life cycle. Identification Similar genera include ''Nephrochlamys'' and ''Juranyiella''; ''Nephrochla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephrocytium Lunaris
''Nephrocytium'' is a genus of green algae in the class Chlorophyceae. Formerly placed in the family Oocystaceae, it is currently placed in its own family, Nephrocytiaceae. Description ''Nephrocytium'' consists of colonies of 4, 8, or 16 asymmetrical cells surrounded by a spherical to ovoid layer of mucilage, which is formed when the mother cell wall expands and gelatinizes. Individual cells are kidney-shaped to ovoid, containing one chloroplast A chloroplast () is a type of membrane-bound organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in ... lining the inside of the cell membrane, each with one pyrenoid. Reproduction occurs asexually. It exclusively forms autospores, and does not appear to have a flagellated stage in its life cycle. Identification Similar genera include ''Nephrochlamys'' and ''Juranyiella''; ''Nephrochla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephrocytium Lunatum
''Nephrocytium'' is a genus of green algae in the class Chlorophyceae. Formerly placed in the family Oocystaceae, it is currently placed in its own family, Nephrocytiaceae. Description ''Nephrocytium'' consists of colonies of 4, 8, or 16 asymmetrical cells surrounded by a spherical to ovoid layer of mucilage, which is formed when the mother cell wall expands and gelatinizes. Individual cells are kidney-shaped to ovoid, containing one chloroplast A chloroplast () is a type of membrane-bound organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in ... lining the inside of the cell membrane, each with one pyrenoid. Reproduction occurs asexually. It exclusively forms autospores, and does not appear to have a flagellated stage in its life cycle. Identification Similar genera include ''Nephrochlamys'' and ''Juranyiella''; ''Nephrochla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nephrocytium EPA
''Nephrocytium'' is a genus of green algae in the class Chlorophyceae. Formerly placed in the family Oocystaceae, it is currently placed in its own family, Nephrocytiaceae. Description ''Nephrocytium'' consists of colonies of 4, 8, or 16 asymmetrical cells surrounded by a spherical to ovoid layer of mucilage, which is formed when the mother cell wall expands and gelatinizes. Individual cells are kidney-shaped to ovoid, containing one chloroplast A chloroplast () is a type of membrane-bound organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in ... lining the inside of the cell membrane, each with one pyrenoid. Reproduction occurs asexually. It exclusively forms autospores, and does not appear to have a flagellated stage in its life cycle. Identification Similar genera include ''Nephrochlamys'' and ''Juranyiella''; ''Nephrochla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Algae
The green algae (singular: green alga) are a group consisting of the Prasinodermophyta and its unnamed sister which contains the Chlorophyta and Charophyta/Streptophyta. The land plants (Embryophytes) have emerged deep in the Charophyte alga as sister of the Zygnematophyceae. Since the realization that the Embryophytes emerged within the green algae, some authors are starting to properly include them. The completed clade that includes both green algae and embryophytes is monophyletic and is referred to as the clade Viridiplantae and as the kingdom Plantae. The green algae include unicellular and colonial flagellates, most with two flagella per cell, as well as various colonial, coccoid and filamentous forms, and macroscopic, multicellular seaweeds. There are about 22,000 species of green algae. Many species live most of their lives as single cells, while other species form coenobia (colonies), long filaments, or highly differentiated macroscopic seaweeds. A few other organi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oocystaceae
Oocystaceae is a family of green algae, in the order Chlorellales. The type genus is '' Oocystis''. List of genera , AlgaeBase accepted the following genera: *'' Amphikrikos'' Korshikov – 6 species *'' Catenocystis'' F.Hindák – 2 species *'' Cerasterias'' Reinsch – 2 species *'' Chodatella'' Lemmermann – 4 species *'' Chodatellopsis'' Korshikov – 1 species *'' Chondrosphaera'' Skuja – 1 species *'' Coenolamellus'' Proshkina-Lavrenko – 1 species *'' Crucigeniella'' Lemmermann – 2 species *'' Cryocystis'' Kol ex Komárek & Fott – 2 species *'' Dactylococcus'' Nägeli – 2 species *'' Dendrocystis'' Iyengar – 1 species *'' Densicystis'' X.Liu, H.Zhu, H.Song, Q.Wang, X.Xiong, C.Wu, G.Liu & Z.Hu – 1 species *'' Didymocystis'' Korshikov – 2 species *'' Droopiella'' Darienko, Rad-Menéndez, C.Campbell & Pröschold – 3 species *'' Ecballocystis'' Bohlin – 9 species *'' Ecballocystopsis'' Iyengar – 5 species *'' Ecdysichlamys'' G.S.West – 5 species *'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroplast
A chloroplast () is a type of membrane-bound organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in the cells. The ATP and NADPH is then used to make organic molecules from carbon dioxide in a process known as 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 unicellular algae, up to 100 in plants like ''Arabidopsis'' and wheat. A chloroplast is characterized by its two membranes and a high concentration of chlorophyll. Other plastid types, such as the leucoplast and the chromoplast, contain little chlorophyll and do not carry out photosynthesis. Chloroplasts are highly dynamic—they circulat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrenoid
Pyrenoids are sub-cellular micro-compartments found in chloroplasts of many algae,Giordano, M., Beardall, J., & Raven, J. A. (2005). CO2 concentrating mechanisms in algae: mechanisms, environmental modulation, and evolution. Annu. Rev. Plant Biol., 56, 99-131. and in a single group of land plants, the hornworts.Villarreal, J. C., & Renner, S. S. (2012) Hornwort pyrenoids, carbon-concentrating structures, evolved and were lost at least five times during the last 100 million years. ''Proceedings of the National Academy of Sciences'',109(46), 1873-1887. Pyrenoids are associated with the operation of a carbon-concentrating mechanism (CCM). Their main function is to act as centres of carbon dioxide (CO2) fixation, by generating and maintaining a CO2 rich environment around the photosynthetic enzyme ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO). Pyrenoids therefore seem to have a role analogous to that of carboxysomes in cyanobacteria. Algae are restricted to aqueous env ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asexual Reproduction
Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. The offspring that arise by asexual reproduction from either unicellular or multicellular organisms inherit the full set of genes of their single parent and thus the newly created individual is genetically and physically similar to the parent or an exact clone of the parent. Asexual reproduction is the primary form of reproduction for single-celled organisms such as archaea and eubacteria, bacteria. Many Eukaryote, eukaryotic organisms including plants, animals, and Fungus, fungi can also reproduce asexually. In vertebrates, the most common form of asexual reproduction is parthenogenesis, which is typically used as an alternative to sexual reproduction in times when reproductive opportunities are limited. Komodo dragons and some monitor lizards can also reproduce asexually. While all prokaryotes reproduce without the formation and fusion of gametes, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autospore
An autospore is a non-motile (non-flagellated) aplanospore that is produced within a parent cell, and has the same shape as the parent cell, before release. Autospores, in addition to zoospore and aplanospore, are one of the three types of spores that algae use to reproduce and spread asexually. Autospores occur in several groups of algae, including Eustigmatophyceae, Dinoflagellates and green algae. For example, the colonial alga '' Dichotomococcus'' produces two autospores per reproducing cell; the autospores escape through a slit in the cell wall A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mech ... and remain attached to the mother cell. Autospore Formation An autospore is defined one of the daughter cells formed by the internal division of a single cell. Autospores are formed a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
