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.[2]
ReproductionEdit
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]
ReferencesEdit
^ abGuiry, M.D. & Guiry, G.M. (2007). "Order: Bryopsidales taxonomy browser". AlgaeBase version 4.2 World-wide electronic publication, National University of Ireland, Galway. Retrieved 2007-09-23.
^ abDay, Robert (1996). "The Cell Biology of the Bryopsidales". Seascope. 13.
^Overview of the Genus Caulerpa 2011-09-28 at the Wayback Machine Proceedings of the International Caulerpa taxifolia Conference, 2002.
October 21, 2023
bryopsidales, order, green, algae, class, ulvophyceae, dead, fingers, codium, fragile, scientific, classification, unranked, viridiplantaedivision, chlorophytaclass, ulvophyceaeorder, schaffnerfamilies, bryopsidaceae, caulerpaceae, chaetosiphonaceae, codiaceae. Bryopsidales is an order of green algae in the class Ulvophyceae 1 BryopsidalesDead man s fingers Codium fragile Scientific classification unranked ViridiplantaeDivision ChlorophytaClass UlvophyceaeOrder BryopsidalesJ H SchaffnerFamilies 1 Bryopsidaceae Caulerpaceae Chaetosiphonaceae Codiaceae Derbesiaceae Dichotomosiphonaceae Halimedaceae Ostreobiaceae Pseudocodiaceae Pseudoudoteaceae Rhipiliaceae UdoteaceaeSynonymsCaulerpalesCharacteristics EditThe 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 2 Reproduction EditPropagation 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 Edit a b Guiry M D amp Guiry G M 2007 Order Bryopsidales taxonomy browser AlgaeBase version 4 2 World wide electronic publication National University of Ireland Galway Retrieved 2007 09 23 a b Day Robert 1996 The Cell Biology of the Bryopsidales Seascope 13 Overview of the Genus Caulerpa Archived 2011 09 28 at the Wayback Machine Proceedings of the International Caulerpa taxifolia Conference 2002 Retrieved from https en wikipedia org w index php title Bryopsidales amp oldid 1011400564, wikipedia, wiki, book, books, library,
