Rastogi AK, Sagar P, Agarwala SC. Correlation of encystment and division in Schizopyrenus russelli.
THE JOURNAL OF PROTOZOOLOGY 1977;
24:294-6. [PMID:
328865 DOI:
10.1111/j.1550-7408.1977.tb00980.x]
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Abstract
Schizopyrenus russelli, a free-living soil ameba, grows and encysts in the presence of bacteria. The encystment occurs with decline in the division rate. This is accompanied by incorporation of [U-14C] glucose into cyst cellulose. The degree of multiplication (but not of encystment) is a function of bacterial concentration. Berenil, a trypanocidal drug, while allowing excystment, completely inhibited multiplication of emerged amebae and their encystment. Addition of this drug after 24 hr, when amebae had gone into a phase of active division failed to check encystment, although it still inhibited further multiplication of the amebae. The findings suggest that a phase of cell division may be a prerequisite for encystment.
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