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.

In the world of filamentous freshwater algae (division Chlorophyta), the genus Zygnema, with its two stellate chloroplasts per cell, is a standout. Found often alongside Spirogyra, another still-water green algal genus, Zygnema species are classified as conjugate algae (phylum Gamophyta) because of their means of sexual reproduction by conjugation.

Based on analysis of 143 rbc L sequences, we revealed a surprisingly high molecular diversity: 12 Arctic Zygnema genotypes and one Zygnemopsis genotype were found. In addition, we characterized individual Arctic genotypes based on cell width and chloroplast morphology using light and confocal laser scanning microscopy.

May 1, 2024 · In this Article, we report on the first four genomes of filamentous Zygnematophyceae, including the first chromosome-scale assemblies for any streptophyte algae. By using comparative genomics, we...

The larger family Zygnemataceae, with well-known genera such as Zygnema and Spirogyra, includes members that grow as unbranched filaments, which grow longer through normal cell division. This group includes the desmids.

Zygnema is a widespread and occasionally abundant alga that usually occurs in neutral to slightly acidic, lentic habitats (ditches, ponds, and lakes), but is also collected frequently from streams.

Mar 24, 2020 · Zygnema circumcarinatum, a filamentous charophycean alga with elongated cells and multiple star-shaped chloroplasts per cell, is found in stagnant waters as ‘large bright green colored, tangled, floating masses’ (Guiry and Guiry, 2013).

Nov 13, 2015 · Zygnema is a genus of filamentous algae whose members characteristically possess two star-shaped chloroplasts per cell. Zygnema species are often found alongside other types of algae and may combine to form large greenish-brown mats or clouds in ponds and other still bodies of water.

May 6, 2024 · Study decodes Zygnema 'star algae' genome, revealing evolutionary steps of plants from water to land, aiding environmental strategies.

Zygnema is a common alga in polar hydro-terrestrial environments. As other filamentous representatives of the order Zygnematales (Zygnematophyceae), it forms extensive mats during the spring and summer seasons.