Lee Kong Chian Natural History Museum

Spirogyra sp. Link., 1820

Kingdom:Plantae
Phylum/Division:Chlorophyta
Class:Zygnematophyceae
Order:Zygnematales
Family:Zygnemataceae
Genus:Spirogyra
Status:Common

Description

The unbranched filaments consist of cylindrical cells that are nearly as broad as long or the length may be several times the breadth. The chloroplasts are ribbon-shaped spiral bands that extend from one end of the cell to the other. Each chloroplast has several pyrenoids that lie equidistant from one another in a linear series. The cell has a single nucleus surrounded by a sheath of cytoplasm and suspended in the middle of the central vaculoe by cytoplasmic strands.

Read more about the Zygnematales order.
Read more about the Zygnemataceae family.

Localities

Most non-flowing freshwaters.

Locality Map

General Biology

Spirogyra is one of the commonest green algae in quiet freshwaters. The filaments are free-floating and usually intermingelw with other algae to form a slippery mass.

Life Cycle

Accidental breakage of filaments lead to increase in number of filaments. Conjugation is anisogamous. Two strands come together with each cell contributing equally to a conjugation tube. The cell contents develop into gametes and the male gametes migrate through the conjugation tube to fuse with the female gametes in the other filament to from a zygote. The zygote eventually germinates into a new filament.

References

Bold, H. C., C. J. Alexopoulos & T. Delevoryas, 1987. Morphology of plants and fungi. Harper & Row, New York. (5th ed.). 912pp.

Related Images

Related People

Spot any errors? Have any questions? Something to contribute? Email us at dbsthh@nus.edu.sg!
Presented by

NUS      RMBR
Sponsored by

Care-for-Nature