sea urchin
Sea urchin embryology in the sixties
... Int J De" lIiol ~O 97 101 (1996) 97 Sea urchin embryology in the sixties The development of sea urchins and other echinodermata is among the most fascinating ones the differences in the mor phology of[.] ...
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Small micromeres contribute to the germline in the sea urchin
... In smm-depleted adults of L. variegatus, each of the four animals showed poorly developed gonads (Fig. 5C,F, arrows) with no gametes visually detectable (Fig. 5I,L). Although we detect yolk platelets (Fig. 5L), which ...
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Studies on the Respiration of Sea Urchin Spermatozoa
... present paper, Dilution Effect is used for general dilution phenomena, including activation of respiration and motility of sea-urchin spermatozoa following dilution with sea water, and R[r] ...
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The Physiology of Sea Urchin Spermatozoa
... Two examples of the alleged physiological differences between dense and dilute sea-urchin sperm suspensions are: 1 Nelson 1948 stated that usnic acid stimulated the respiration of dense [r] ...
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The evolution of sea urchin sperm bindin
... of sea urchins supports the idea that it plays a central and conserved role in the function of ...in sea urchin fertilization: it functions in sperm-egg attachment and it is involved in the fusion of ...
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Calcium in sea urchin egg during fertilization
... Int I De, lliul J~ 117 125(1490) 117 Calcium in sea urchin egg during fertilization ISABEllE GillOT'' PATRICK PAYAN', JEAN PIERRE GIRARD' and CHRISTIAN SARDET' 'Unite de Biologie Cellulaire Marine, UR[.] ...
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Homeobox genes and sea urchin development
... transcription factors is certainly needed to activate the homeobox containing gene PlHbox12. The early, transient and spatially restricted expression suggest that PlHbox12 is involved in cell fate specification of the ...
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The Physiology of Sea Urchin Spermatozoa Action of Versene
... The effect of adding sea water containing different concentrations of versene to suspensions of sea-urchin spermatozoa Echinus esculentus has been investigated, as regards their respirat[r] ...
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Neurogenic gene regulatory pathways in the sea urchin embryo
... the sea urchin embryo ectoderm is achieved in part through downregulation of neurogenic potential by separate signaling mechanisms operating along the maternally established animal-vegetal (future ...
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The genomic regulatory control of skeletal morphogenesis in the sea urchin
... during sea urchin gastrulation, we also find evidence of a widespread transcriptional upregulation of many cytoskeletal genes in ...the Sea Urchin Genome Project website ...
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The sea urchin regulome in development
... unknown sea urchin regulatory ...the sea urchin ...the sea urchin genes encoding ets, fox and homeodomain regulators, and in detail their many subfamilies, are in their DNA ...
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The Physiology of Sea Urchin Spermatozoa
... After sea-urchin semen has been washed with sea water to remove the seminal plasma, the O2 uptake of the resultant sperm suspension is markedly lower than that of the same number of sper[r] ...
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The Physiology of Sea Urchin Spermatozoa
... But as such substances are not normally responsible for the lack of sperm movement in sea-urchin semen, it would be important to see whether salmon and trout spermatozoa in semen become [r] ...
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The Propulsion of Sea Urchin Spermatozoa
... Bearing in mind the above limitations it seems, nevertheless, remarkable that the forward speed of propulsion of a spermatozoon can be calculated well within the limits of experimental e[r] ...
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The bald-sea-urchin disease: a biopathological approach
... Disease-produced traces on echinoid test skeleton (dead echinoids collected in the field) (horizontal lines represent 5 mm).. 7: greenish colored area (early infestation; Paracentrotu[r] ...
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The Respiratory and Glycolytic Enzymes of Sea Urchin Eggs
... Activity corresponding to phosphoglucomutase, phosphohexoisomerase, aldolase, triosephosphate dehydrogenase, enolase and lactic dehydrogenase has been demonstrated in homogenates prepare[r] ...
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The Movement of Sea Urchin Spermatozoa
... 5 A| the bending wave is symmetrical on the two sides of the tail; if the spermatozoon were imagined to slide forward within a closely fitting rigid tube the head would move along a symm[r] ...
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The Physiology of Sea Urchin Spermatozoa
... In spite of the earlier experiments on the carbohydrate content of the spermatozoa and seminal plasma of these sea-urchins Rothschild & Mann, 1950, we re-estimated the amount of glycogen[r] ...
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Microdissection Experiments on Sea Urchin Eggs at Cleavage
... TEARING ONE BLASTOMERE OF A CLEAVING EGG Chambers 1938 described a microdissection experiment in which he tore open one blastomere at a dumb-bell stage in Arbacia punctulata eggs which w[r] ...
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The Metabolism of Fertilized and Unfertilized Sea Urchin Eggs
... This point might be clarified by examining the inhibitory action of HCN on unfertilized eggs in the dark, in the presence of CO, but at a sufficiently low partial pressure to avoid CO in[r] ...
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