Inorganic ion compositions in brown algae, with special reference to sulfuric acid ion accumulations

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Abstract: 

Cellular pH estimated from cell extract pH and the ion compositions of major inorganic ions (Na+, NH4+, K+, Mg2+, Ca2+,Cl-, Br-, N03-, S042-) were studied by ion chromatography in 61 species of 10 orders (Dictyotales, Desmarestiales, Ectocarpales, Chordariales, Scytosiphonales, Dictyosiphonales, Cutleriales, Sporochnales, Laminariales and Fucales) of Phaeophyceae. Three species in the order Dictyotales, Dictyopteris sp., Spatoglossum solierii (Chauv.) Kiitzing and umaria stipitata Tanaka et K. Nozawa, were newly found to be highly acidic (pH 0.6 and 1.4 within cells), in addition to previously reported dictyotalean species, Dictyopteris latiuscula (Okamura) Okamura, D. prolifera (Okamura) Okamura, D. repens (Okamura) B~rgesen and Spatoglossum crassum J. Tanaka. They all contained high concentrations of S042- perhaps within the vacuoles. Furthermore, Delamarea attanuata (Kjellman) Rosenvinge (Dictyosiphonales) and Thalassiophyllum clathrus (GmeI.) P. et R. (Laminariales) were shown to contain relatively high concentrations of S042- balanced by relatively high concentrations of Ca2+.

Author(s): 
Hiroshi Kawai
Akio Murakami
Hironao Kataoka
Hideaki Sasaki
Keywords: 
brown algae
Dictyotales
inorganic ions
ion chromatography
pH
sulfuric acid
Link / Ref: 
Semantics Scholar
Attachment: 
PDF icon Inorganic ion compositions in brown algae, with special reference to sulfuric acid ion accumulations.pdf
Article Source: 
Hydrobiologia 512: 255-262, 2004
Category: 
Basic Biology
Seaweed composition