Bryopsidales
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| Dead man's fingers (Codium fragile) | |
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Bryopsidales
J.H. Schaffner
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Bryopsidales is an order of green algae, in the class Bryopsidophyceae.[1]
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. [2][3]
References
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ The Cell Biology of the Bryopsidales Retrieved 2011-08-22.
- ↑ Overview of the Genus Caulerpa Proceedings of the International Caulerpa taxifolia Conference, 2002.
External links
Scientific references
- PubMed references for Bryopsidales
- PubMed Central references for Bryopsidales
- Google Scholar references for Bryopsidales
