Chaetosphaeridium globosum
From Wikipedia, the free encyclopedia
| Chaetosphaeridium globosum | |
|---|---|
 | |
Scientific classification  | |
| Clade: | Viridiplantae |
| Division: | Charophyta |
| Class: | Coleochaetophyceae |
| Order: | Chaetosphaeridiales |
| Family: | Chaetosphaeridiaceae |
| Genus: | Chaetosphaeridium |
| Species: | C. globosum |
| Binomial name | |
| Chaetosphaeridium globosum (Nordst.) Kleb.[1] | |
| Synonyms[2] | |
| |
Chaetosphaeridium globosum is a species of green algae in the class Coleochaetophyceae. It is widely distributed and probably has a cosmopolitan distribution.[3] Chaetosphaeridium globosum is a streptophyte, the lineage from which land plants evolved. Because of this, its genome is of considerable interest for the study of the evolution of plants.[4]
Chaetosphaeridium globosum consists of solitary cells, or groups of cells connected to each other by their cell walls or by a common layer of mucilage. The cells are typically 11–18 μm in diameter, spherical to flask-shaped, and has a long bristle which is surrounded by a prominent tube or sheath at the base. Each cell contains one or two parietal, plate-like chloroplast.[3]
Asexual reproduction occurs by biflagellate zoospores.[3] Ultrastructurally, the flagella is covered in three-pronged scales, likened to a maple leaf.[5] Sexual reproduction is oogamous, with small biflagellate male gametes and oogonia which are larger than vegetative cells.[3]
One variety, var. depressum, is known from the British Isles; it differs from the typical variety in having somewhat depressed cells (8.5–9.5 μm high).[3]