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Gas exchange of algae. 3. Relation between the concentration of carbon dioxide in the nutrient medium and the oxygen production of Chlorella pyrenoidosa.

Applied microbiology·1967
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Gas exchange of algae. II. Effects of oxygen, helium, and argon on the photosynthesis of Chlorella pyrenoidosa.

Applied microbiology·1966
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Purine metabolism by unicellular algae. 3. The photochemical degradation of uric acid by chlorophyll.

Biochimica et biophysica acta·1966
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Utilization of glutamine and glutamic acid by Chlorella pyrenoidosa.

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GAS EXCHANGE OF ALGAE. I. EFFECTS OF TIME, LIGHT INTENSITY, AND SPECTRAL-ENERGY DISTRIBUTION ON THE PHOTOSYNTHETIC QUOTIENT OF CHLORELLA PYRENOIDOSA.

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Photopatterning Proteins and Cells in Aqueous Environment Using TiO2 Photocatalysis
10:26

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Published on: October 26, 2015

Utilization of nitrogen compounds by unicellular algae.

E C BIRDSEY, V H LYNCH

    Science (New York, N.Y.)
    |September 7, 1962
    PubMed
    Summary

    Certain algae can use urea, uric acid, and xanthine as nitrogen sources. However, none of the tested algae could utilize allantoin or creatinine for growth.

    Area of Science:

    • Algology
    • Microbial Physiology
    • Nitrogen Metabolism

    Background:

    • Algae represent diverse photosynthetic organisms with varied metabolic capabilities.
    • Nitrogen source utilization is a critical factor for algal growth and productivity.
    • Understanding nitrogen assimilation pathways in different algal divisions is essential for ecological and biotechnological applications.

    Purpose of the Study:

    • To investigate the ability of various algal divisions to utilize specific nitrogen compounds.
    • To determine the utilization patterns of urea, uric acid, xanthine, allantoin, and creatinine as sole nitrogen sources.
    • To identify algal species capable of metabolizing purine derivatives.

    Main Methods:

    • Culturing of selected algal species from Chlorophyta, Cyanophyta, Rhodophyta, and Euglenophyta divisions.
    Keywords:
    ALGAE/metabolismNITROGEN/metabolism

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  • Growth experiments using urea, uric acid, xanthine, allantoin, and creatinine as the sole nitrogen source.
  • Observation and measurement of algal growth under defined culture conditions.

    • Main Results:

    • Eight species of Chlorophyta demonstrated the ability to utilize urea as a sole nitrogen source.
    • Five species of Chlorophyta could utilize uric acid and xanthine as sole nitrogen sources.
    • Cyanophyta, Rhodophyta, and Euglenophyta species did not grow on urea, uric acid, or xanthine; however, Anacystis nidulans decomposed uric acid to allantoin.
    • No tested algae utilized allantoin or creatinine as nitrogen sources.

    Conclusions:

    • Significant metabolic diversity exists within algal divisions regarding nitrogen source utilization.
    • Chlorophyta exhibit a broader capacity for utilizing purine derivatives and urea compared to other studied divisions.
    • Allantoin and creatinine are not readily utilized by the tested algal species, suggesting specific enzymatic limitations.