Antialgal activity of chloroplatinic acid on Chlamydomonas eugametos

1974 ◽  
Vol 52 (4) ◽  
pp. 715-717 ◽  
Author(s):  
K. Nakamura ◽  
W. L. Hepler ◽  
E. J. Shaskin ◽  
D. W. Brooks
Keyword(s):  
Cell Division ◽  
Green Alga ◽  
Platinum Compound ◽  
Chloroplatinic Acid ◽  
Antialgal Activity ◽  
Chlamydomonas Eugametos ◽  
Unicellular Green Alga ◽  
Acid Effect ◽  
Dividing Cells

The effect of chloroplatinic acid on the growth of the unicellular green alga Chlamydomonas eugametos has been studied. This platinum compound reduces the rate of cell division and induces palmelloid formation by preventing the liberation of dividing cells. Recovery from the chloroplatinic-acid effect occurs after removal of the compound from the medium.

scholarly journals Sexual Agglutination in the Unicellular Green Alga Chlamydomonas eugametos

1985 ◽  
Vol 79 (3) ◽  
pp. 740-745 ◽  
Author(s):  
Frans M. Klis ◽  
Marieke R. Samson ◽  
Egbert Touw ◽  
Alan Musgrave ◽  
Herman van den Ende
Keyword(s):  
Green Alga ◽  
Sexual Agglutination ◽  
Chlamydomonas Eugametos ◽  
Unicellular Green Alga

scholarly journals Dephosphorylation pathway of d-myo-inositol 1,4,5-trisphosphate in the unicellular green alga Chlamydomonas eugametos

1994 ◽  
Vol 35 (2) ◽  
pp. 349-352
Author(s):  
Hans Klerk ◽  
John A.J. Van Himbergen ◽  
Alan Musgrave ◽  
Peter J.M. Van Haaster ◽  
Herman Van Den Ende
Keyword(s):  
Green Alga ◽  
Chlamydomonas Eugametos ◽  
Unicellular Green Alga ◽  
Inositol 1,4,5 Trisphosphate

Ultrastructure of a palmelloid-forming strain of Chlamydomonas eugametos

1978 ◽  
Vol 56 (19) ◽  
pp. 2348-2356 ◽  
Author(s):  
Kazuo Nakamura ◽  
Douglas F. Bray ◽  
Emile B. Wagenaar
Keyword(s):  
Cell Wall ◽  
Cell Walls ◽  
Transitional Region ◽  
Chloroplatinic Acid ◽  
Cell Wall Formation ◽  
Body Structure ◽  
Wild Type ◽  
Adhesive Properties ◽  
Chlamydomonas Eugametos ◽  
Unicellular Green Alga

A palmelloid-forming mutant of the unicellular green alga Chlamydomonas eugametos has been studied ultrastructurally. The repetition, within the palmelloid envelope, of four-celled groups surrounded by wall layers suggests that normal asexual cytokinesis occurs but successive cell generations are unable to separate. Individual palmelloid cells are smaller than wild-type cells and possess flagella which are short (1–2 μm) and occasionally bulbous at the tip but appear normal with regard to internal microtubular, transitional region, and basal body structure. The association of granules with the outer surface of the palmelloid envelope and the tendency of palmelloids to form large aggregates in culture indicate a change in the adhesive properties of the cell walls of this mutant. A comparison of the ultrastructure of mutant palmelloids with previously described chloroplatinic-acid-induced palmelloids shows that the two types differ in both flagellar development and in the extent of cell wall formation.

Limited uptake as a mechanism for the nonrecoverability of arginine auxotrophs in Chlamydomonas eugametos

1985 ◽  
Vol 63 (5) ◽  
pp. 909-915 ◽  
Author(s):  
Kazuo Nakamura ◽  
Charles F. Landry ◽  
Christine A. Goertzen ◽  
N. Wayne Ikebuchi
Keyword(s):  
Amino Acid ◽  
Chlamydomonas Reinhardtii ◽  
Nitrogen Source ◽  
Green Alga ◽  
Mutation Spectrum ◽  
Sole Nitrogen Source ◽  
Selective Media ◽  
Chlamydomonas Eugametos ◽  
Unicellular Green Alga ◽  
Concentration Ratios

To address the problem of amino acid auxotroph scarcities in algae, an explanation was sought specifically for the nonrecoverability of arginine auxotrophs in the unicellular green alga Chlamydomonas eugametos. Chlamydomonas reinhardtii, in which the auxotroph has been recovered, was taken as a reference. In C. eugametos, unlike previously reported in C. reinhardtii, the use of selective media free of [Formula: see text] appeared not to affect the mutation spectrum. Arginine supported growth as the sole nitrogen source and canavanine sulfate inhibited growth, but both effects were less pronounced in C. eugametos. The concentration ratios (based on intracellular arginine accumulation) in C. eugametos remained less than 23% that of C. reinhardtii. The results indicate that nonrecoverability of arginine auxotrophs in C. eugametos is due to insufficient cellular accessibility to arginine.

Nuclear genes encoding chloroplast hemoglobins in the unicellular green alga Chlamydomonas eugametos

1994 ◽  
Vol 243 (2) ◽  
pp. 185-197 ◽  
Author(s):  
Manon Couture ◽  
Hélène Chamberland ◽  
Benoit St-Pierre ◽  
Jean Lafontaine ◽  
Michel Guertin
Keyword(s):  
Green Alga ◽  
Nuclear Genes ◽  
Chlamydomonas Eugametos ◽  
Unicellular Green Alga ◽  
Genes Encoding
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