The Chemical Composition of Marine Algae

Mg, Macpherson; Eg, Young

doi:10.1139/cjr49c-006

Cited by 9 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The procedure of a single wash of the cells with a solution of the nutrient under study was then arbitrarily adopted as one which would give most accurate values for elemental content within the cell structure. In comparing the values reported in this paper with those of others it was noted that our values for calcium and iron agree with those found in the literature (8,11,13). Our values for phosphorus are, however, 10 to 100 times those reported by Scott (11,12,13), but they are within the range of 1 to 4 times those reported for bean plant leaves (3).…”

supporting

confidence: 46%

The Absorption of Inorganic Ions by Chlorella pyrenoidosa.

Knauss¹,

Porter²

1954

Plant Physiol.

View full text Add to dashboard Cite

GREGORY ET AL-CO2 AND PHOTOPERIODISM metabolism and photoperiodism. Thesis In the course of experiments on the effect of radioactive elements on the growth of Chlorella pyrenoidosa, Porter and Knauss (9), determinations were made of the content of a radioactive element in algal cells when the ratio of that element to its stable isotope was kept constant, but the total concentration of the two isotopes in the solution was varied. Calculations were then made, assuming no isotope effect, of the total contents of the two isotopes in the algal cells. These determinations were made for the elements P, S, Ca, Fe, Mn, Zn, Cu, and Sr.A limited amount of information is available on the effect of the nutrient concentration of an element on the uptake of that element by algae. Scott (11) has reported that the ratio of uptake of calcium and magnesium by Chlorella depends upon the ratio of these two elements in the nutrient solution. Scott (12) has also studied the behavior of phosphatedeficient cells during a restoration period when adequate phosphate was supplied to the nutrient medium. He found the phosphate uptake to be proportional to the nutrient concentration only at levels that were limiting for growth.More information on the effect of nutrient concentration of an element on its uptake has been obtained through studies with higher plants and diatoms. Beckenbach et al (1), in making a statistical analysis of the relationship between the ionic content of the culture solution and the element content in corn plant tissues, found the most important single factor affecting the absorption and accumulation of an element in plant tissues to be its absolute concentration in the nutrient solution. Similar results were reported by Tidmore (14) on corn, sorghum, and tomatoes, and by Beeson et al (2) on tomato plants. Recently, Rediske and Selders (10) reported the uptake of strontium by plants to be proportional to the concentration of this element in the nutrient solution. Goldberg et al (5), working with diatoms, found the phosphate uptake to be proportional to the concentration in the medium over the range 0.5 to 3.5 ,ug/l. Similar findings were reported by Ketchum (7). Seven and one half ml of nutrient solution (KNO3, 3.0 gm/l; MgSO4 * 7 H20, 4.8 gm/l; Ca(NO3)2, 1.0 gm/l; KH2PO4, 3.0 gm/l; MnSO4 * H20, 2.0 mg/l; H3BO3, 2.0 mg/l; CUSO4-5 H20, 0.2 mg/l, and ZnSO4-7 H20, 0.2 mg/l), less the element being investigated, were added to 20 x 150 mm culture tubes. Varying amounts of the element being studied and the appropriate amounts of water were added to each tube. After sterilization each tube received 0.2 ml of a sterile iron solution (1 gm FeSO4 -7 H20/500 ml), 1.0 ml of inoculum (an optical density of 0.60 at 660 mnA/18 mm tube, approximately 17 x 106 cells/ ml) and amounts of a solution containing a radioactive isotope of the element under study to yield a final specific activity of one mc/gm of that element.In experiments on the absorption of copper the specific activity was 3 to 8 mc/gm of element. Radioisotopes used were p3...

show abstract

supporting

confidence: 46%

The Absorption of Inorganic Ions by Chlorella pyrenoidosa.

Knauss¹,

Porter²

1954

Plant Physiol.

View full text Add to dashboard Cite

show abstract

“…According to literature data, different red algae contain from 2.3 (C. officinalis) to 47% DW (Pyropia tenera) of total protein (reviewed in [15,32]). These values are generally in good accordance with our results (Table 1), and for several well-studied algae, our results confirm data previously obtained on the same species (e.g., 18.3-26.5% DW for P. palmata and 2.3-6.9% DW for C. officinalis) [33][34][35][36][37]. Most of the protein-rich species in our study belong to the order Ceramiales (C. virgatum, R. confervoides, S. arctica) (Tables 1 and 4).…”

Section: Discussionsupporting

confidence: 93%

“…Traditionally, seaweeds are valued for their high mineral content, as they contain more essential elements compared to the terrestrial plants [18,19]. The mineral composition of red algae is well documented, and our results are generally in good accordance with literature data [16,33,54,55]. Among the mass of red algal species inhabiting the White Sea coast, the most studied and exploited species is P. palmata.…”

Section: Discussionsupporting

confidence: 88%

Chemical Composition and Potential Practical Application of 15 Red Algal Species from the White Sea Coast (the Arctic Ocean)

et al. 2021

View full text Add to dashboard Cite

Though numerous valuable compounds from red algae already experience high demand in medicine, nutrition, and different branches of industry, these organisms are still recognized as an underexploited resource. This study provides a comprehensive characterization of the chemical composition of 15 Arctic red algal species from the perspective of their practical relevance in medicine and the food industry. We show that several virtually unstudied species may be regarded as promising sources of different valuable metabolites and minerals. Thus, several filamentous ceramialean algae (Ceramium virgatum, Polysiphonia stricta, Savoiea arctica) had total protein content of 20–32% of dry weight, which is comparable to or higher than that of already commercially exploited species (Palmaria palmata, Porphyra sp.). Moreover, ceramialean algae contained high amounts of pigments, macronutrients, and ascorbic acid. Euthora cristata (Gigartinales) accumulated free essential amino acids, taurine, pantothenic acid, and floridoside. Thalli of P. palmata and C. virgatum contained the highest amounts of the nonproteinogenic amino acid β-alanine (9.1 and 3.2 μM g−1 DW, respectively). Several red algae tend to accumulate heavy metals; although this may limit their application in the food industry, it makes them promising candidates for phytoremediation or the use as bioindicators.

show abstract

“…The role of trace substances is not clear because of the complexity of solution interactions between metals, solution interactions with dissolved organics and biological interactions with aquatic plants (see Jackson, 1977). Goldberg (1965) Black & Mitchell, 1952Boothe & Knauer, 1972Bryan, 1969Bryan & Hutnmerstone, 1973Butler, 1931Dave et al, 1973Foster, 1975Foster, 1976 Fuge & James, Fujikawa, Fukuda et al, 1965Gryzhankova et al, 1975Gutknecht, 1965Law, 1975MacPherson & Young, 1949Meguro et^ al., 1967Morris & Bale, 1975Presnyakova et al, 1974Shimokawa et al, 1971Stenner & Nickless, 1975Styron et aj,., 1976Tong & Chaikoff, 1955Wort, 1955Yamamoto et al, 1970…”

Section: Trace Substancesmentioning

confidence: 99%