Studies on Reproduction in AMOEBA PROTEUS.
نویسنده
چکیده
PAGE INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 Material and methods of culture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124 Constancy of the characteristics of diverse types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126 Influence of diversities in environmental conditions on the rate of reproduction and the rhythmic character of the divisions in A . proteus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 The origin and the methods of reproduction of polynucleate forms of A . proteus . . . . . . . . . 137 Occurrence of polynucleate Amoebae.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138 Origin of the polynucleate Amoebae . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 Methods of reproduction of polynucleate Amoebae ................................. 141 Division of binucleate Amoebae.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142 ResumC.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Experimental modification.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Division of the trinucleate Amoebae, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146 ResumC.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 Division of the tetranucleate Amoebae.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 SUMMARY.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 LITERATTDE CITED .............................................................. 150
منابع مشابه
Studies on changes in the nuclear helices of Amoeba proteus during the cell cycle.
The fine structure of the nuclei of synchronously growing cell population of Amoeba proteus was studied at I-h intervals during the interphase. This study showed that the nuclear helices undergo increases in their number at certain stages during interphase. These changes were found to correlate with ultrastructural changes occurring in the nucleoli.
متن کاملInfective Organisms in the Cytoplasm of Amoeba Proteus
Evidence from electron and phase microscopy is given which shows that infective organisms are present in the cytoplasm of Amoeba proteus. Vesicles containing living organisms have been observed after repeated washing and starvation of the amebae for a period of 2 weeks. Exposure to gamma-radiation in conjunction with starvation, repeated washing, isolation of single amebae, refeeding with conta...
متن کاملCytoplasmic Dna Synthesis in Amoeba Proteus
The application of electron microscope autoradiography to Amoeba proteus cells labeled with tritiated thymidine has permitted the identification of morphologically distinct particles in the cytoplasm as the sites of incorporated DNA precursor. The particles correspond to those previously described from light microscope studies, with respect to both H(3)Tdr incorporation and distribution in cent...
متن کاملThe effect of temperature variation on the multiplication rate of two strains of Amoeba proteus
The effect of temperature variation on the multiplication rates of two strains of Amoeba proteus and the corresponding heterotransfer strains obtained by transplantation of nuclei between the 'parent' strains, has been studied. The two 'parent' strains multiply at a similar rate at 17° C but at different rates at 27 C and 11° C. The multiplication rates of the heterotransfers follow the cytopla...
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عنوان ژورنال:
- Genetics
دوره 9 2 شماره
صفحات -
تاریخ انتشار 2003