What are the characteristics of Zygnema?
Diagnostic features Unbranched filamentous zygnematalean with cylindrical cells, each containing 2 green star-shaped axial chloroplasts. Nucleus often visible between the chloroplasts. Filament is coated with a thin mucilage layer; consequently, strands of Zygnema are soapy to the touch.
What is the classification of Zygnema?
ZygnematophyceaeZygnema / ClassZygnematophyceae is a class of green algae in the division Charophyta, consisting of more than 4000 described species. It contains the order Zygnematales. The Desmidiales emerged within the Zygnematales. The Zygnematophyceae are the sister clade of the Mesotaenium, together forming the sister clade of the land plants. Wikipedia
What is the shape of chloroplast of Zygnema?
star-shaped
The filaments form a yellow-green to bright green colored tangled mat, and are composed of elongate barrel-shaped cells, each with two star-shaped (stellate) chloroplasts arrayed along the axis of the cell….
| Zygnema | |
|---|---|
| (unranked): | Charophyta |
| Class: | Zygnematophyceae |
| Order: | Zygnematales |
| Family: | Zygnemataceae |
Is Zygnema a diatom?
Published information on the algal communities of the Rio Grande is sparse. Cladophora, Zygnema, and periphytic diatoms (Synedra and Cymbella) were common in the Pecos River (Davis 1980a).
How many chloroplasts are in Zygnema cells?
Zygnema. Zygnema has short, unbranched filaments composed of cylindrical cells within a mucilage sheath. Each cell has two stellate chloroplasts, each with a large central pyrenoid.
Is Zygnema multicellular or unicellular?
Molecular phylogenies of land plants and their closest algal ancestors reveal that land plants evolved from an algal ancestor shared with the Zygnematales, a clade of freshwater algae (Figure 1) [19–22]. Zygnematales are either unicellular or form unbranched filaments, and do not make PD.
Is Zygnema a green algae?
Green algae of the genus Zygnema form extensive mats and produce large amounts of biomass in shallow freshwater habitats.
Does Zygnema have a nucleus?
Zygnema. Zygnema has short, unbranched filaments composed of cylindrical cells within a mucilage sheath. Each cell has two stellate chloroplasts, each with a large central pyrenoid. The nucleus is located within the cytoplasmic bridge connecting the two chloroplasts (arrow, below image).
Is Zygnema unicellular or multicellular?
unicellular
Molecular phylogenies of land plants and their closest algal ancestors reveal that land plants evolved from an algal ancestor shared with the Zygnematales, a clade of freshwater algae (Figure 1) [19–22]. Zygnematales are either unicellular or form unbranched filaments, and do not make PD.