Determination of photosynthetic rates for the marine algae Fucus vesiculosus and Laminaria digitata

1976 ◽  
Vol 37 (3) ◽  
pp. 209-213 ◽  
Author(s):  
R. J. King ◽  
W. Schramm
Keyword(s):  
Marine Algae ◽  
Fucus Vesiculosus ◽  
Laminaria Digitata ◽  
Photosynthetic Rates

THE CONCENTRATION OF NUCLEIC ACIDS IN SOME COMMON MARINE ALGAE

1964 ◽  
Vol 42 (11) ◽  
pp. 1471-1480 ◽  
Author(s):  
E. Gordon Young
Keyword(s):  
Nucleic Acids ◽  
Ribonucleic Acid ◽  
Marine Algae ◽  
Deoxyribonucleic Acid ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Fucus Vesiculosus ◽  
Chondrus Crispus ◽  
Rna And Dna

The method of Smillie and Krotkov has been applied to the estimation of soluble ribonucleic acid and deoxyribonucleic acid in nine species of marine algae, representative of the Chlorophyceae, Rhodophyceae, and Phaeophyceae. Treatment of the extract with an anion exchange resin was essential for the determination of RNA. Values for RNA and DNA, expressed as percentages of total solids, were respectively as follows: Ulva lactuca 0.63 and 0.10, Chondrus crispus 0.91 and 0.65, Rhodymenia palmata 0.73 and 0.41, Porphyra umbilicalis 1.62 and 0.19, Furcellaria fastigiata 0.37 and 0.36, Laminaria longicruris 0.68 and 0.06, L. digitata 0.67 and 0.30, L. agardhii 0.90 and 0.07, Fucus vesiculosus 0.29 and 0.05, based on commercial nucleic acids assayed by ultraviolet absorption, as standards. Use of ribose and deoxyribose as standards gave lower results. Attempts to prepare pure polynucleotides from several marine algae were unsuccessful.

The component fatty acids of some sea-weed fats

1966 ◽  
Vol 46 (1) ◽  
pp. 153-159 ◽  
Author(s):  
L. Chuecas ◽  
J. P. Riley
Keyword(s):  
Fatty Acids ◽  
Marine Algae ◽  
Fucus Vesiculosus ◽  
Lead Salt ◽  
Eicosatetraenoic Acid ◽  
Salt Crystallization ◽  
Hexadecenoic Acid ◽  
Gas Liquid Chromatography ◽  
Laminaria Digitata ◽  
Hydrogen Atoms

The component acids of the fats of the following marine algae have been investigated by gas-liquid chromatography:Rhodymenia palmata, Laurencia pinnatifida, Laminaria digitata, L. saccharina, Fucus vesiculosus, F. serratus, Pelvetia canaliculata, Ascophyllum nodosum. The principal saturated acids are palmitic and myristic acids, some contain ca. 2–5% of stearic acid; traces of C8 and C10 saturated acids are present, but C12 (and in all but one) C 20saturated acids are absent. The major unsaturated acids are octadecenoic and octadecadienoic acids (probably oleic and linoleic acids), but some species also contain appreciable amounts (up to 12%) of hexadecenoic acid. All the oils contain significant amounts of an eicosatetraenoic acid (probably arachidonic acid) and in some eicosatrienoic and/or eicosapentaenoic acids are also present in small quantities. Two acids of unknown constitution (possibly branched chain acids) are also present in minor amounts. No C22 unsaturated acids could be detected.INTRODUCTIONVery little is known about the component fatty acids of marine algae. Lovern (1936) examined the fatty acids from the fats of Fucus vesiculosus, Laminaria digitata and Rhodymenia palmata using lead salt crystallization and fractional distillation techniques (Table 2). With these methods, however, it was not possible to separate individual unsaturated acids having the same number of carbon atoms from one another. The mean unsaturation values of these fractions were therefore evaluated from their iodine values and expressed as the number of hydrogen atoms necessary to convert the fraction to the corresponding fully saturated state; thus ( — 4–0H) indicates an average unsaturation corresponding with two double bonds.

Direct Determination of Strontium in Marine Algae Samples by Laser-Induced Breakdown Spectrometry

2002 ◽  
Vol 56 (11) ◽  
pp. 1511-1514 ◽  
Author(s):  
Lin Niu ◽  
Hyo-Hyun Cho ◽  
Kyu-Seok Song ◽  
Hyungki Cha ◽  
Yongseong Kim ◽  
...  
Keyword(s):  
Marine Algae ◽  
Direct Determination ◽  
Laser Induced Breakdown

EXCRETION OF COLORED ULTRAVIOLET-ABSORBING SUBSTANCES BY MARINE ALGAE

1964 ◽  
Vol 42 (1) ◽  
pp. 23-33 ◽  
Author(s):  
J. S. Craigie ◽  
J. McLachlan
Keyword(s):  
Ultraviolet Light ◽  
Alkaline Hydrolysis ◽  
Marine Algae ◽  
Elevated Temperatures ◽  
Surrounding Medium ◽  
Fucus Vesiculosus ◽  
Small Decrease

Normal, healthy thalli of Fucus vesiculosus have been shown to release into the surrounding medium yellow compounds which absorb ultraviolet light. A study of this phenomenon revealed that brief exposure to elevated temperatures (20 °C) increased the amount of pigment released. There was no difference in the production in light or darkness and only a small decrease with reduced salinity. The amount of pigmentation observed in the medium was directly proportional to the degree of alkalinity from pH 7 to pH 9.A number of other macrophytes and microphytes were examined and only those possessing physodes released substances giving a spectrum similar to that of F. vesiculosus.Isolation of the material, alkaline hydrolysis, and chromatography revealed phloroglucinol and several unidentified fluorescent substances. It appears that these materials were flavonols or catechin-type tannins.

PHOTOSYNTHESIS AND METABOLISM IN MARINE ALGAE: VII. PRODUCTS OF PHOTOSYNTHESIS IN FRONDS OF FUCUS VESICULOSUS AND THEIR USE IN RESPIRATION

1967 ◽  
Vol 45 (9) ◽  
pp. 1557-1565 ◽  
Author(s):  
R. G. S. Bidwell
Keyword(s):  
Sodium Carbonate ◽  
Marine Algae ◽  
Fucus Vesiculosus ◽  
Complex Compounds ◽  
Major Product ◽  
Dilute Acid ◽  
Active Metabolites

Samples of Fucus vesiculcsus fronds were permitted to assimilate 14CO2 for 5 h and were then maintained in alternating periods of light and darkness for 3 days. Samples were collected at intervals, and the radioactivity of various simple and complex compounds was measured. The major product of photosynthesis was mannitol; relatively small amounts of 14C entered other compounds. From its behavior, it appears that mannitol is the major substrate of respiration in these plants; there may be secondary substrates among the complex polysaccharides. The complex polysaccharides are not formed directly from mannitol in light, but from some common precursors, or else from a small isolated pool of mannitol which is separated from the main cellular supplies. In darkness, the complex polysaccharides appear to be derived from stored mannitol. One of the more active metabolites, judged from its behavior, is a component of the residue left after dilute acid and sodium carbonate extraction. This component undergoes turnover, i.e. breakdown and resynthesis from newly-acquired photosynthate in the light, and is formed from stored photosynthate in the darkness.

Determination of bioconcentration potential of tetrachloroethylene in marine algae by 13C

Chemosphere ◽  
1996 ◽  
Vol 33 (5) ◽  
pp. 865-877 ◽  
Author(s):  
Xiulin Wang ◽  
Shigeki Harada ◽  
Masataka Watanabe ◽  
Hiroshi Koshikawa ◽  
Kazumi Sato ◽  
...  
Keyword(s):  
Marine Algae

Determination of the Biomass and Phycocolloid Contents of some Marine Algae from Eritrea

2000 ◽  
Vol 11 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Y. YOUNIS ◽  
S. TECLEAB ◽  
T. GHEZA ◽  
I. RAHAMA
Keyword(s):  
Marine Algae

scholarly journals Betaine Yields from Marine Algal Species Utilized in the Preparation of Seaweed Extracts Used in Agriculture

2010 ◽  
Vol 5 (4) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Gerald Blunden ◽  
Peter F. Morse ◽  
Imre Mathe ◽  
Judit Hohmann ◽  
Alan T. Critchley ◽  
...  
Keyword(s):  
Marine Algae ◽  
Algal Species ◽  
First Record ◽  
Commercial Production ◽  
The Other ◽  
Minor Constituent ◽  
Laminaria Digitata ◽  
Seaweed Extracts ◽  
Marine Algal ◽  
A Minor

Ascophyllum nodosum, and to a lesser extent, Laminaria digitata, L. hyperborea and Fucus serratus, are marine algal species utilized in the commercial production of seaweed extracts used in agriculture. Betaines have been shown to be important constituents of these extracts, but there appears to have been no study made on whether there are variations in the betaine contents of these species based on either the place or date of collection. Samples of each of the four species were collected from widely separated areas at different times of the year. Also, in the case of A. nodosum, approximately monthly collections were made from one location. The betaines detected in the various collections of the same species showed little variation, although in the case of A. nodosum, glycinebetaine was found as a minor constituent in some samples, but was not detected in others. Trigonelline was found in all the tested samples of the two Laminaria species; this is, to our knowledge, the first record of this betaine in marine algae. With the exception of trigonelline in the Laminaria species, the betaine yields from the various samples of L. digitata, L. hyperborea and F. serratus showed little variation, regardless of either the place or date of collection. The trigonelline contents of the Laminaria species collected at one location (Finavarra, Ireland), in particular of L. hyperborea, was substantially greater than those from the other places of collection. In the case of A. nodosum, the betaine yields from samples collected at one site (Dale, Pembrokeshire, UK) were significantly higher than those from the other places of collection, which were very similar to each other. There was no clear indication of seasonal variation in betaine yields from A. nodosum.

Sign in / Sign up

Export Citation Format

Share Document