+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Reproduction and life history of the red alga galaxaura oblongata nemaliales galaxauraceae



Reproduction and life history of the red alga galaxaura oblongata nemaliales galaxauraceae



Journal of Phycology 20(3): 402-409



Culture and morphological studies showed that G. oblongata (Ellis et Solander) Lamouroux has a triphasic life history with conspicuous gametophytes and small filamentous tetrasporophytes. Development of male and female reproductive structures is very similar and both begin with the enlargement of a terminal cell of a filament branch occupying a normal vegetative position within the apical pit of a thallus branch. In male thalli this modified branch forms a conceptacle in which spermatangia are produced. In female thalli, this modified branch forms a 3-celled carpogonial branch consisting of a carpogonium, hypogynous cell and basal cell. Filament branches from the basal cell form a pericarp and the gonimoblast develops directly from the carpogonium. Carposporangia are produced in conceptacles which resemble the male conceptacles. About the time the 1st carposporangia are produced, the carpogonium, hypogynous cell and basal cell form a large fusion cell. Released carpospores germinate in a unipolar or bipolar manner and form small filamentous thalli. Under short day conditions, cruciate tetrasporangia are produced in small clusters. Tetraspores germinate similarly to carpospores and also form small filamentous thalli. Under low nutrient conditions, small cylindrical thalli develop on the filaments and these appear similar to gametophytes collected in nature.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 006315475

Download citation: RISBibTeXText

DOI: 10.1111/j.0022-3646.1984.00402.x


Related references

Studies of H5N1 influenza virus infection of pigs by using viruses isolated in Vietnam and Thailand in 2004. Journal of Virology 79(16): 10821-10825, 2005

The structure and reproduction of Patenocarpus paraphysiferus gen. et sp. nov. (Dermonemataceae, Nemaliales, Rhodophyta). Phycologia 26(1): 47-52, 1987

The red alga polysiphonia rhodomelaceae in the northern gulf of california. Smithsonian Contributions to the Marine Sciences (1): 1-22, 1977

Cystobranchus respirans new record troschel 1850 hirudinea piscicolidae in the midcourse of the makolnica river poland. Przeglad Zoologiczny 32(1): 35-40, 1988

The reproductive cycle of the sea urchin Psammechinus miliaris (Echinodermata: Echinoidea) in a Scottish sea loch. Journal of the Marine Biological Association of the United Kingdom 80(5): 909-919, 2000

Ultrastructure of post-fertilization development in the red alga Nienburgia andersoniana (Delesseriaceae, Ceramiales, Rhodophyta). Botanical Journal of the Linnean Society 142(3): 289-299, 2003

Partial characterization properties and clinical significance of a lactate dehydrogenase immuno globulin a kappa complex in serum. Clinical Chemistry 29(2): 272-278, 1983

Skeletal ultrastructure and phylogeny of cyclostome bryozoans. Zoological Journal of the Linnean Society 128(4): 337-399, 2000

Ceramium bisporum (Rhodophyta, Ceramiales), an unusual new species from deep-water habitats in the Caribbean. Phycologia 29(2): 146-149, 1990

A revision of the australian pulvinariine soft scales insecta hemiptera coccidae. Journal of Natural History 26(1): 103-164, 1992

The red algal genus predaea nemastomataceae gigartinales in australia. Phycologia 23(1): 3-20, 1984

Remarks on the taxonomy and nomenclature of lotus krylovii d schis and lotus corniculatus l sp frondosus d. Folia Geobotanica and Phytotaxonomica 5(1): 89-97, 1970

Systematics of the anamorphic basidiomycetous yeast genus Trichosporon Behrend with the description of five novel species: Trichosporon vadense, T. smithiae, T. dehoogii, T. scarabaeorum and T. gamsii. International Journal of Systematic and Evolutionary Microbiology 54(Pt 3): 975-986, 2004

Conspecific density dependence and community structure: Insights from 11 years of monitoring in an old-growth temperate forest in Northeast China. Ecology and Evolution 7(14): 5191-5200, 2017

Critical criteria for identification of the genus Chaetoceros (Bacillariophyta) based on setae ultrastructure. I. Subgenus Chaetoceros. Phycologia 53(2): 174-187, 2014