Polysiphonia atlantica is a small filamentous species of red marine algaeRhodophyta. The thalli form small tufts up to 3 cm long. The axes are ecorticate consisting of axial cells surrounded by four periaxial cells.[1]
Polysiphonia atlantica is a small alga 3 cm high and dark reddish-brown in colour. It grows in tufts from prostrate axes producing numerous erect branches all growing to the similar lengths. The axial cells are surrounded by 4 periaxial cells which are elongate to the same length as the axial cells which are ecorticate. Attached by rhizoids produced by the periaxial cells.[1]
Reproductionedit
The life history is a sequence of three phases: gametangial, carposporangial and tetrasporangial.[2] The plants are dioecious with spermatangial branchlets at the apices of the branches, cystocarps are slightly urceolate. The tetrasporangia occur the branches in a straight series.[1]
Habitatedit
Growing on rock, mussels other invertebrates or epiphytic. Between high and low water levels.[1][3]
Distributionedit
Records have been made from the British Isles- England, Ireland, Wales and Scotland, to Morocco, east coast of America and the Indian Ocean.[1] Most of the records from the British Isles are probably those of Polysiphonia stricta.[3]
Referencesedit
^ abcdeMaggs, C.A. and Hommersand, M.H. 1993 Seaweeds of the British Isles. Volume 1 Rhodophyta Part 3A Ceramiales. The Natural History Museum, London. ISBN9781907807725
^Dixon, P.S. Biology of the Rhodophyta. p.187. Oliver & Boyd. ISBN0-05-002485 X
^ abHardy, F.G. and Guiry, M.D. 2003. A Check-list and Atlas of the Seaweeds of Britain and Ireland. The British Phycological Society. ISBN0952711516
October 28, 2023
polysiphonia, atlantica, small, filamentous, species, marine, algae, rhodophyta, thalli, form, small, tufts, long, axes, ecorticate, consisting, axial, cells, surrounded, four, periaxial, cells, scientific, classification, unranked, archaeplastidadivision, rho. Polysiphonia atlantica is a small filamentous species of red marine algae Rhodophyta The thalli form small tufts up to 3 cm long The axes are ecorticate consisting of axial cells surrounded by four periaxial cells 1 Polysiphonia atlanticaScientific classification unranked ArchaeplastidaDivision RhodophytaClass FlorideophyceaeOrder CeramialesFamily RhodomelaceaeGenus PolysiphoniaSpecies P atlanticaBinomial namePolysiphonia atlanticaKapraun amp J N Norris Contents 1 Description 2 Reproduction 3 Habitat 4 Distribution 5 ReferencesDescription editPolysiphonia atlantica is a small alga 3 cm high and dark reddish brown in colour It grows in tufts from prostrate axes producing numerous erect branches all growing to the similar lengths The axial cells are surrounded by 4 periaxial cells which are elongate to the same length as the axial cells which are ecorticate Attached by rhizoids produced by the periaxial cells 1 Reproduction editThe life history is a sequence of three phases gametangial carposporangial and tetrasporangial 2 The plants are dioecious with spermatangial branchlets at the apices of the branches cystocarps are slightly urceolate The tetrasporangia occur the branches in a straight series 1 Habitat editGrowing on rock mussels other invertebrates or epiphytic Between high and low water levels 1 3 Distribution editRecords have been made from the British Isles England Ireland Wales and Scotland to Morocco east coast of America and the Indian Ocean 1 Most of the records from the British Isles are probably those of Polysiphonia stricta 3 References edit a b c d e Maggs C A and Hommersand M H 1993 Seaweeds of the British Isles Volume 1 Rhodophyta Part 3A Ceramiales The Natural History Museum London ISBN 9781907807725 Dixon P S Biology of the Rhodophyta p 187 Oliver amp Boyd ISBN 0 05 002485 X a b Hardy F G and Guiry M D 2003 A Check list and Atlas of the Seaweeds of Britain and Ireland The British Phycological Society ISBN 0952711516 Retrieved from https en wikipedia org w index php title Polysiphonia atlantica amp oldid 1011403042, wikipedia, wiki, book, books, library,
