Title: Artificial Parthenogenesis in the Sea Urchin Created Date: 1/3/2008 4:55:03 AM R. Hertwig was the first to observe the segmentation of unfertilized sea-urchin eggs, which normally die if not fertilized. In a previous paper 1 it was shown that sea-water concentrated by evaporation to a definite volume would produce partheno-genesis in eggs of the sea-urchin, Arbacia, subjected to its influence for a given length of time. Transplantation was the second experimental manipulation of development. By J. F. Mcclendon. Previous studies on artificial parthenogenesis, especially those involving the eggs of echinoderms, often employed cleavage as a criterion of activation. The book also illuminates the historical role of the sea urchin in the study of embryological development. Experiments by Herbst, E. Hertwig, T. H. Morgan, and espe cially by Loeb, show that the unfertilized eggs of the sea-urchin may be so stimulated by chemi cal solutions as to undergo the earlier phases of development. ON ARTIFICIAL PARTHENOGENESIS OF THE SEA-URCHIN EGG. Developmental Biology 216 , 394 – 405 . and Plaxton , W.C. ( 1988 ) Binding of glycolytic enzymes to a particulate fraction in … adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A This does not mean that all types of coagulative change cause the egg to begin its studies in artificial parthenogenesis: i. membrane elevation in the sea-urchin egg This was proven when artificial parthenogenesis of sea urchin eggs showed that fertilization was not necessary to make larval urchins. Artificial Parthenogenesis in the Sea Urchin On the Nature of the Process of Fertilization and the Artificial Production of Normal Larvae (Plutei) from Unfertilized Eggs of the Sea Urchin. J.) 454-455 DOI: 10.1126/science.30.770.454 . 30, Issue 770, pp. Membrane Formation and Pigment Migration in Sea Urchin Eggs as Bearing on the Problem of Artificial Parthenogenesis STUDIES IN ARTIFICIAL PARTHENOGENESIS.1 I. MEMBRANE ELEVATION IN THE SEA-URCHIN EGG. ARTIFICIAL PARTHENOGENESIS. The DTT/pronase medium was made with CaFSW containing 10 mM EDTA adjusted to pH 8.9. J. STUDIES IN ARTIFICIAL PARTHENOGENESIS: I. MEMBRANE ELEVATION IN THE SEA-URCHIN EGG by Lewis V Heilbrunn. Treating sea urchin eggs with hypertonic seawater or subjecting them to other stimuli causes them to develop without the presence of sperm,a phenomenon called A) isogamy B) polyspermy. Article; Info & Metrics; eLetters; PDF; This is a PDF-only article. Exp. Sea Urchin can be induced successfully if it is treated with some salt solution or organic acid, electric shock or shacking them in sea water. Guidetti P, Bussotti S, Boero F. Mar Environ Res, 59(4):333-348, 01 May 2005 Cited by: 10 articles | PMID: 15589985 Miller, B.S. HEAT PARTHENOGENESIS L. V. HEILBRUNN University of Vichigm Earlier study has shown that all agents which cause artifi- cial parthenogenesis in the sea-urchin egg produce a coagula- tion in the cytoplasm (Heilbrunn, '15). E) fertilization sensitivity. We may therefore consider artificial parthenogenesis to be demonstrated by the segmentation of unfertilized eggs which do not normally segment until fertilized. The reproductive quirk called “parthenogenesis” of some reptiles and lower animals was artificially induced for the first time in sea urchins and reported in 1899 by the German-American scientist Jacques Loeb (1859–1924). Their eggs can be easily fertilized and then develop rapidly and synchronously. Science 01 Oct 1909: Vol. There is a long history of studies of artificial parthenogenesis in sea-urchin eggs, and some of the conditions that activate unfertilized eggs were already identified as early as the beginning of this century (see Harvey, 1956, for a review). A CYTOLOGICAL STUDY OF ARTIFICIAL PARTHENOGENESIS IN THE SEA URCHIN ARBACIA PUNCTULATA . On fertilization, artificial parthenogenesis, and cytolysis of the sea urchin egg.. [Jacques Loeb; John Bruce MacCallum] Jacques Loeb broadened and corrected his earlier claims concerning artificial parthenogenesis in sea urchins in a series of experiments in 1900. Journal of Cell Biology, 47, 140-158. The results from >40 sediment-quality assessment surveys using early–life stages of the sea urchin Arbacia punctulata were compiled and examined to determine acceptable ranges of natural variables such as pH, ammonia, and dissolved organic carbon … The pioneer workers on the problem (Tichomiroff, 0. and R. the sea urchin Lytechinus pictus were ob- tained by the injection of 0.5 M KC1 into the coelomic cavity. Because of its relation to the theory of hemolysis on the one hand and to that of membrane formation in artificial parthenogenesis By Martin I. Sachs and Everett Anderson. THE MECHANISM OF CYTOLYSIS IN SEA URCHIN EGGS. Eggs of the sea urchin Arbacia punctulata were artificially activated with hypertonic seawater. The influence of potentially confounding factors has been identified as a concern for interpreting sea urchin porewater toxicity test data. BY A. R. MOORE. 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