Control of ciliary activities by adenosinetriphosphate and divalent cations in triton-extracted models of Paramecium caudatum.
نویسندگان
چکیده
منابع مشابه
Behavioral Mutants in PARAMECIUM CAUDATUM.
Mutants of Paramecium caudatum with abnormal swimming behavior or responses to cations were obtained by mutagenesis with N-methyl-N'-nitro-N-nitrosoguanidine. Some of the mutants, like pawn in P. tetraurelia, cannot swim backward and are called CNR. Seven independently obtained CNR mutants belonged to three complementation groups, designated as cnrA, cnrB and cnrC. Some characteristics of doubl...
متن کاملThe relations between membrane potential and parameters of ciliary beat in free-swimming Paramecium caudatum.
It has been known for many years that electric currents flowing through a suspension of Paramecium modify the beating characteristics of the cilia in such a way that the organisms turn and move towards the cathode (Ludloff, 1895; Jennings, 1906). Jahn (1961) has accounted for this behaviour by supposing that current flows through the cell membrane and either enhances or reverses the normal cili...
متن کاملControl of the Orientation of Cilia by Adenosinetriphosphate, Calcium, and Zinc in Glycerol-Extracted Paramecium caudatum
The predominant orientation of cilia in glycerol-extracted Paramecium is toward the posterior of the specimen in a KCl solution. The cilia became reoriented toward the anterior shortly after transfer of the extracted cell to a mixture of ATP, calcium, and zinc. The degree of response was graded as a function of the concentration of each of the three essential factors. Minimum concentrations for...
متن کاملDirectional change of ciliary beat effected with Mg2+ in Paramecium.
Two types of Triton X-100 extracted model of Paramecium caudatum were prepared and effects of the ionic compositions of the reactivating medium on the swimming behaviour of the extracted models were examined. Type I, prepared by the method of Naitoh and Keneko, did not change swimming direction depending on the concentrations of Mg2+ and K+ in the reactivating medium. Type II, prepared by a dif...
متن کاملIonic Control of the Reversal Response of Cilia in Paramecium caudatum
The duration of ciliary reversal of Paramecium caudatum in response to changes in external ionic factors was determined with various ionic compositions of both equilibration and stimulation media. The reversal response was found to occur when calcium ions bound by an inferred cellular cation exchange system were liberated in exchange for externally applied cations other than calcium. Factors wh...
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عنوان ژورنال:
- The Journal of experimental biology
دوره 58 3 شماره
صفحات -
تاریخ انتشار 1973