Girish Mahajan (Editor)

Bryopsidales

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Covid-19
Domain  Eukaryota
Division  Chlorophyta
Higher classification  Bryopsidophyceae
Kingdom  Viridiplantae
Scientific name  Bryopsidales
Rank  Order
Bryopsidales httpswwwasturnaturacomImagenesMenuguiasfa
Lower classifications  Caulerpa, Codium, Halimeda, Bryopsis, Udoteaceae

Bryopsidales is an order of green algae, in the class Bryopsidophyceae.

Contents

Characteristics

The thallus is filamentous and much branched and may be packed into a mass. It is coenocytic, having multi-nucleate cells consisting of cytoplasm contained within a cylindrical cell wall. There are no septae and the many discoid chloroplasts, nuclei and other organelles are free to move through the organism. The whole organism may consist of a single cell and in the genus Caulerpa this may be several metres across. In the genus Halimeda, whole seabed meadows may consist of an individual, single-celled organism connected by filamentous threads running through the substrate.

Reproduction

Propagation is normally vegetative from small fragments which grow into new individuals. Under certain conditions sexual reproduction occurs in a process called holocarpy. Almost all of the cytoplasm in the thallus is converted into biflagellate gametes, which are discharged into the sea through papillae. After fertilisation, the zygote becomes a protonema and this in turn develops into a new thallus.

References

Bryopsidales Wikipedia


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