Klebsormidium
Genus of algae
From Wikipedia, the free encyclopedia
Klebsormidium is a genus of filamentous charophyte green algae comprising 20 species.[1] The name was proposed in 1972 to resolve confusion in application and status of Hormidium[Note 1] and was given for the German botanist Georg Albrecht Klebs.[Note 2]
P.C.Silva, Mattox & W.H.Blackwell[1][2]
| Klebsormidium | |
|---|---|
| |
Scientific classification  | |
| Kingdom: | Plantae |
| Class: | Klebsormidiophyceae |
| Order: | Klebsormidiales |
| Family: | Klebsormidiaceae |
| Genus: | Klebsormidium P.C.Silva, Mattox & W.H.Blackwell[1][2] |
| Type species | |
| Klebsormidium flaccidum P.C.Silva, Mattox & W.H.Blackwell[1] | |
| Species | |
|
See species list. | |
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The algae occurs mostly in soil and on moist substrates, nevertheless, aquatic and one marine species are also known. Many Klebsormidium-species are able to synthesize substances for UV protection, the so-called mycosporine-like amino acids. The draft genome sequence of Klebsormidium nitens NIES-2285 (called K. flaccidum at the time of publication) was published in 2014.[3]
Description
Klebsormidium forms uniseriate (one cell thick), unbranched filaments. Cells are cylindrical or barrel-shaped. The cell wall may be thin or thickened, and is sometimes made of H-shaped pieces. Each cell contains a single parietal chloroplast which encircles around 40 to 70% of the cell wall, usually with a single pyrenoid.[4]
Klebsormidium reproduces asexually but not sexually. It produces zoospores with two flagella, which are released from cells through a pore. It can also produce aplanospores and akinetes.[4]
The genus can be difficult to distinguish from Ulothrix, but Ulothrix tends to have chloroplasts that are wider and encircling nearly all of the cell.[4]
Species
The valid species currently considered to belong to this genus are:
- Klebsormidium acidophilum
- Klebsormidium bilatum
- Klebsormidium crenulatum
- Klebsormidium dissectum
- Klebsormidium drouetii
- Klebsormidium elegans
- Klebsormidium flaccidum
- Klebsormidium fluitans
- Klebsormidium fragile
- Klebsormidium klebsii
- Klebsormidium lamellosum
- Klebsormidium montanum
- Klebsormidium mucosum
- Klebsormidium nitens
- Klebsormidium pseudostichococcus
- Klebsormidium scopulinum
- Klebsormidium sterile
- Klebsormidium subtile
- Klebsormidium subtilissimum
- Klebsormidium tribonematoideum
The species of Klebsormidium are in critical need of a taxonomic revision. Traditional morphological characteristics used to delimit the taxa, such as the width of filaments or shape of cells, are unreliable and do not map well to phylogenetic groups.[5]
Notes
- Hormidium nitens G.A.Klebs 1896
- Georg Albrecht Klebs (1857-1918) Dinophyceae, Chrysophyceae and Xanthophyceae specialist
