|
Hafniomonas
''Hafniomonas'' is a genus of green algae in the family Dunaliellaceae.See the NCBIbr>webpage on Hafniomonas Data extracted from the It is found in freshwater. ''Hafniomonas'' is a unicellular, flagellate alga. Cells are elongate, ovoid, pyriform or cylindrical or globose-cordate; they are typically somewhat four-sided in cross section, with the anterior end bearing four longitudinal, rounded ridges. At the center of the anterior end emerge four flagella, sometimes with a small papilla. The cell contains a single nucleus, two contractile vacuoles, and one cup-shaped, parietal chloroplast and a distinct stigma and pyrenoid. The chloroplast may be perforate, separated into segments. Asexual reproduction occurs via cell division, and sometimes cells form cysts or palmelloid stages. Sexual reproduction is unknown. ''Hafniomonas'' consists of species that were formerly classified within ''Pyramimonas''. Unlike ''Pyramimonas ''Pyramimonas'' is a genus of green algae in the order ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hafniomonas Reticulata
''Hafniomonas'' is a genus of green algae in the family Dunaliellaceae.See the National Center for Biotechnology Information, NCBI]webpage on Hafniomonas Data extracted from the It is found in freshwater. ''Hafniomonas'' is a unicellular, flagellate alga. Cells are elongate, ovoid, pyriform or cylindrical or globose-cordate; they are typically somewhat four-sided in cross section, with the anterior end bearing four longitudinal, rounded ridges. At the center of the anterior end emerge four flagella, sometimes with a small papilla. The cell contains a single nucleus, two contractile vacuoles, and one cup-shaped, parietal chloroplast and a distinct eyespot apparatus, stigma and pyrenoid. The chloroplast may be perforate, separated into segments. Asexual reproduction occurs via cell division, and sometimes cells form microbial cyst, cysts or palmelloid stages. Sexual reproduction is unknown. ''Hafniomonas'' consists of species that were formerly classified within ''Pyramimonas''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hafniomonas Turbinea
''Hafniomonas'' is a genus of green algae in the family Dunaliellaceae.See the NCBIbr>webpage on Hafniomonas Data extracted from the It is found in freshwater. ''Hafniomonas'' is a unicellular, flagellate alga. Cells are elongate, ovoid, pyriform or cylindrical or globose-cordate; they are typically somewhat four-sided in cross section, with the anterior end bearing four longitudinal, rounded ridges. At the center of the anterior end emerge four flagella, sometimes with a small papilla. The cell contains a single nucleus, two contractile vacuoles, and one cup-shaped, parietal chloroplast and a distinct stigma and pyrenoid. The chloroplast may be perforate, separated into segments. Asexual reproduction occurs via cell division, and sometimes cells form cysts or palmelloid stages. Sexual reproduction is unknown. ''Hafniomonas'' consists of species that were formerly classified within ''Pyramimonas''. Unlike ''Pyramimonas ''Pyramimonas'' is a genus of green algae in the order ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlamydomonadales Genera
Chlamydomonadales, also known as Volvocales, are an order of flagellated or pseudociliated green algae, specifically of the Chlorophyceae.See the NCBIbr>webpage on Chlamydomonadales Data extracted from the Chlamydomonadales can form planar or spherical colonies. These vary from '' Gonium'' (four to 32 cells) up to '' Volvox'' (500 cells or more). Each cell has two flagella, and is similar in appearance to ''Chlamydomonas'', with the flagella throughout the colony moving in coordination. Both asexual and sexual reproduction occur. In the former, cells divide until they form new colonies, which are then released. In the smaller forms, typically all cells are involved, but larger forms have anterior vegetative and posterior reproductive cells. Sexual reproduction varies from isogamy (both genders produce flagellated gametes of equal size) to oogamy (one gender produces a much larger, nonmotile gamete). The classification of the Chlamydomonadales varies. Very often they are taken ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlamydomonadales
Chlamydomonadales, also known as Volvocales, are an order of flagellated or pseudociliated green algae, specifically of the Chlorophyceae.See the NCBIbr>webpage on Chlamydomonadales Data extracted from the Chlamydomonadales can form planar or spherical colonies. These vary from '' Gonium'' (four to 32 cells) up to '' Volvox'' (500 cells or more). Each cell has two flagella, and is similar in appearance to '' Chlamydomonas'', with the flagella throughout the colony moving in coordination. Both asexual and sexual reproduction occur. In the former, cells divide until they form new colonies, which are then released. In the smaller forms, typically all cells are involved, but larger forms have anterior vegetative and posterior reproductive cells. Sexual reproduction varies from isogamy (both genders produce flagellated gametes of equal size) to oogamy (one gender produces a much larger, nonmotile gamete). The classification of the Chlamydomonadales varies. Very often they are ta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dunaliellaceae
Dunaliellaceae is a family of algae in the order Chlamydomonadales. It is widespread in freshwater and saline environments worldwide, less so in marine waters. Members of the family Dunaliellaceae are single-celled, flagellate algae. They are of various shapes (most commonly spheroidal, less commonly flattened), without sharp edges, ribs or processes. The periplast lacks cell walls or other coverings, such as scales, and are thus flexible to varying degrees. Two or four flagella are present. The chloroplast is variable in shape, and a both a pyrenoid and stigma may be present or absent; some taxa are colorless and lack chloroplasts (or at least they are reduced to leucoplasts). Reproduction occurs by cell division, which begins at the apex of the cell. Dunaliellaceae, as currently circumscribed, is polyphyletic. A systematic revision is underway that includes molecular data to better reflect phylogenetic relationships. Currently, both the traditional name Dunaliellaceae is in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Center For Biotechnology Information
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 located in Bethesda, Maryland, and was founded in 1988 through legislation sponsored by US Congressman Claude Pepper. The NCBI houses a series of databases relevant to biotechnology and biomedicine and is an important resource for bioinformatics tools and services. Major databases include GenBank for DNA sequences and PubMed, a bibliographic database for biomedical literature. Other databases include the NCBI Epigenomics database. All these databases are available online through the Entrez search engine. NCBI was directed by David Lipman, one of the original authors of the BLAST sequence alignment program and a widely respected figure in bioinformatics. GenBank NCBI had responsibility for making available the GenBank DNA seque ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include non-salty mineral-rich waters, such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of vascular plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. Fresh water is the water resource that is of the most and immediate use to humans. Fresh water is n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Algae
The green algae (: green alga) are a group of chlorophyll-containing autotrophic eukaryotes consisting of the phylum Prasinodermophyta and its unnamed sister group that contains the Chlorophyta and Charophyta/ Streptophyta. The land plants ( Embryophytes) have emerged deep within the charophytes as a sister of the Zygnematophyceae. Since the realization that the Embryophytes emerged within the green algae, some authors are starting to 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 (spherical), and filamentous forms, and macroscopic, multicellular seaweeds. There are about 22,000 species of green algae, many of which live most of their lives as single cells, while other species form coenobia (colonies), long filaments ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Contractile Vacuole
A contractile vacuole (CV) is a sub-cellular structure (organelle) involved in osmoregulation. It is found predominantly in protists, including unicellular algae. It was previously known as pulsatile or pulsating vacuole. Overview The contractile vacuole is a specialized type of vacuole that regulates the quantity of water inside a cell. In freshwater environments, the concentration of solutes is hypotonic, lower outside than inside the cell. Under these conditions, osmosis causes water to accumulate in the cell from the external environment. The contractile vacuole acts as part of a protective mechanism that prevents the cell from absorbing too much water and possibly lysing (rupturing) through excessive internal pressure. The contractile vacuole, as its name suggests, expels water out of the cell by contracting. The growth (water gathering) and contraction (water expulsion) of the contractile vacuole are periodical. One cycle takes several seconds, depending on the sp ... [...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] |
