Effects of Chemicals on Some Members of Indian Charophyta I
Y. S. R. K. Sarma,S. N. Tripathi +1 more
TLDR
Of the four chemicals, theobromine proved to be most potent mitotic inhibitor and brought about mitotic inhibition in all the algae investigated, to some extent or the other, levels of inhibition depending upon the concentrations of the chemicals or durations of treatment in the same concentrations.Abstract:
SUMMARYThe effects of four different chemicals (colchicine, MH, caffeine and theobromine) on four taxa belonging to Chara and Nitella have been studied cytologically. Out of four different chemicals, MH did not produce any immediate cytological effects, which however, appeared subsequently when the materials were transferred to chemical free medium subsequent to treatments. All the chemicals brought about mitotic inhibition in all the algae investigated, to some extent or the other, levels of inhibition depending upon the concentrations of the chemicals or durations of treatment in the same concentrations. Of the four chemicals, theobromine proved to be most potent mitotic inhibitor. Colchicine has induced polyploidy, even upto the level of tetraploidy in C. globularis and C. braunii. Cytokinetic inhibition was brought about rarely by colchicine in C. globularis and more frequently by caffeine and theobromine treatments resulting in binucleate cells. Pycnotic nuclei were observed in all the treatments of ...read more
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Cytotoxic effects of maleic hydrazide.
Z. Swietlińska,J Zuk +1 more
TL;DR: Maleic hydrazide proved to be of low toxicity to mammals, but in some instances it decreased the fertility of rats, and the reported carcinogenic effects of MH in mice and rats raise the question of its risks to man.
Journal ArticleDOI
Colchicine‐induced alterations in colony development in eudorina elegans (volvocales, chlorophyta)
TL;DR: Colonies of Eudorina elegans Ehrenberg were treated with 0.2% colchicine solution for periods of up to 48 h, and a number of alterations were observed in dividing colonies, including an inhibition of inversion, an increase in golgi‐associated vesicles, and an excessive production of colonial envelope material.
Journal ArticleDOI
Mutagenicity of Triacontanol in Tolypella prolifera (Div. Charophyta)
TL;DR: Mutagenicity of 1-Triacontanol was tested on Tolypella prolifera for chromosome analysis in place of polyploid inducing colchicine and on the basis of induced chromosomal and nuclear aberrations, mitotic index and the percentage of aberrated cells.
References
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Journal ArticleDOI
Action of maleic hydrazide on the cell.
C. D. Darlington,John McLEISH +1 more
TL;DR: The substance known as maleic hydrazide (1,2-dihydropyridazine-3,6-dione) was introduced in 1949 by the United States Rubber Co. as a “growth regulator” with practical value in enhancing winter hardiness, delaying flowering, inducing male sterility, and also in controlling weeds.
Journal ArticleDOI
The Iron Alum Acetocarmine Method for Algæ
TL;DR: The chromosomes of many Algae have been found difficult to stain by the ordinary acetocarmine method, and the addition of ferric acetate or other Jferric salts to the carmine solution brings about only slight improvement, if any, as observed by Baker1.
Journal ArticleDOI
The cytological and genetical significance of colchicine
B. R. Nebel,M. L. Ruttle +1 more
Journal ArticleDOI
Factors affecting the production of chromosome aberrations by chemicals
TL;DR: The results of a study on the influence of temperature, hydrogen ion concentration, and oxygen tension on the production of chromosome aberrations in Vicia root tips by maleic hydrazide, di-(2, 3-epoxypropyl)ether, and 8-ethoxycaffeine, are described.
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