Search results
Results From The WOW.Com Content Network
Zygnema is a genus of freshwater filamentous thalloid alga comprising about 100 species. [4] A terrestrial species, Z. terrestre, is known from India.Zygnema grows as a free-floating mass of filaments, although young plants may be found anchored to streambeds with a holdfast.
Haploid algal cells (containing only one copy of their DNA) can fuse with other haploid cells to form diploid zygotes. When filamentous algae do this, they form bridges between cells, and leave empty cell walls behind that can be easily distinguished under the light microscope. This process is called conjugation and occurs for example in Spirogyra.
Spirogyra (common names include water silk, mermaid's tresses, and blanket weed) is a genus of filamentous charophyte green algae of the order Zygnematales, named for the helical or spiral arrangement of the chloroplasts that is characteristic of the genus. Spirogyra species, of which there are more than 500, are commonly found in freshwater ...
Desmidiales, commonly called the desmids (Gr. desmos, bond or chain), are an order in the Charophyta, a division of green algae in which the land plants (Embryophyta) emerged. [2] Desmids consist of single-celled (sometimes filamentous or colonial) microscopic green algae.
Algae have photosynthetic machinery ultimately derived from cyanobacteria that produce oxygen as a byproduct of splitting water molecules, unlike other organisms that conduct anoxygenic photosynthesis such as purple and green sulfur bacteria. Fossilized filamentous algae from the Vindhya basin have been dated to 1.6 to 1.7 billion years ago. [11]
The simplest brown algae are filamentous—that is, their cells are elongate and have septa cutting across their width. They branch by getting wider at their tip, and then dividing the widening. [14] These filaments may be haplostichous or polystichous, multiaxial or monoaxial forming or not a pseudoparenchyma.
Brown algae have many unique characteristics in terms of their metabolism and cell biology. Ergo, brown algae and in particular, E. siliculosus, are often used for explorative research. Its genome was the first brown macroalgal genome to be sequenced, with the expectation that E. siliculosus will serve as a genetic and genomic model for brown ...
Oedogonium is a genus of filamentous, free-living green algae. It was first discovered in the fresh waters of Poland in 1860 by W. Hilse, and later given its name by German scientist K. E. Hirn. The morphology of Oedogonium is unique, with an interior and exterior that function differently from one another and change throughout its life cycle.