Morphogenetic substances from sea urchin eggs. Isolation of animalizing and vegetalizing substances from unfertilized eggs of Paracentrotus lividus

In the eggs of Arbacia lixula and Paracentrotus lividus an uptake of K occurs during the first 10 minutes following fertilization. Between 10 and 40 minutes K is then released. Both in Arbacia and in Paracentrotus the minimum point of the curve coincides with the nuclear streak stage. A maximum loss of 25 per cent in Arbacia and 20 per cent in Paracentrotus with respect to the amount present in the unfertilized eggs has been found. From 40 minutes up to 1 hour K undergoes a further increase and when the first cleavage sets in the same amount of K is present as in the unfertilized eggs. By treating the eggs with K-free artificial sea water it has been established that about 60 per cent of the K content of the eggs is in a non-diffusible condition. Also under such conditions the eggs when fertilized are able to take up even the very small amount of K present in the medium that was released by them prior to fertilization.

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Evidence for an acidic compartment in sea urchin eggs (Paracentrotus lividus): role at fertilization

Biochimie ◽

10.1016/0300-9084(87)90023-x ◽

1987 ◽

Vol 69 (4) ◽

pp. 321-328 ◽

Cited By ~ 4

Author(s):

Patrick Payan ◽

Jean-Pierre Girard ◽

Florence Viglietti

Keyword(s):

Sea Urchin ◽

Paracentrotus Lividus ◽

Sea Urchin Eggs ◽

Acidic Compartment

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Isolation and properties of a soluble fraction of Paracentrotus lividus sea urchin eggs responsible for the calcium-induced oxidative burst

Experimental Cell Research ◽

10.1016/0014-4827(90)90271-b ◽

1990 ◽

Vol 188 (1) ◽

pp. 10-15

Author(s):

Nurit Firon ◽

Abel Schejter

Keyword(s):

Sea Urchin ◽

Oxidative Burst ◽

Soluble Fraction ◽

Paracentrotus Lividus ◽

Sea Urchin Eggs

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A Remarkable Case of Animalization in a Batch of Eggs of Paracentrotus lividus

Development ◽

10.1242/dev.4.2.217 ◽

1956 ◽

Vol 4 (2) ◽

pp. 217-219

Author(s):

Sven Hörstadius ◽

Tryggve Gustafson

Keyword(s):

Sea Urchin ◽

Sea Water ◽

Paracentrotus Lividus ◽

Senior Author ◽

Abnormal Development ◽

Larval Body ◽

Remarkable Case ◽

Sea Urchin Eggs ◽

Artificial Fertilization ◽

The One

Sea-Urchin eggs generally develop quite normally after artificial fertilization. Sometimes it may be difficult to obtain good membrane elevation, but, after repeated washing in sea-water, fertilization and further development may be quite normal. In some batches of eggs abnormalities may, however, be observed in the pluteus stage, but these abnormalities, as a rule, do not change the pattern of the larvae profoundly. The defects are generally restricted to the arms and to the skeletal rods which, for example, may fail to grow out to their normal length, or may bend in an abnormal direction. Supernumerary rods may also appear, and rods may grow in an abnormal direction inside the larval body without causing a change in the exterior of the pluteus. During many years of experimental work with sea-urchin eggs, for the senior author dating thirty years back, we have never encountered, nor have we seen in the literature, examples of such an abnormal development as the one described in this paper.

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Regulation of intracellular calcium release during fertilization in sea urchin eggs

10.31274/rtd-180813-13280 ◽

1997 ◽

Author(s):

Shyh-Jye Lee

Keyword(s):

Intracellular Calcium ◽

Sea Urchin ◽

Calcium Release ◽

Sea Urchin Eggs ◽

Intracellular Calcium Release

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Effects of Glyphosate-Based and Derived Products on Sea Urchin Larval Development

Journal of Marine Science and Engineering ◽

10.3390/jmse8090661 ◽

2020 ◽

Vol 8 (9) ◽

pp. 661

Author(s):

Davide Asnicar ◽

Costanza Cappelli ◽

Ahmad Safuan Sallehuddin ◽

Nur Atiqah Maznan ◽

Maria Gabriella Marin

Keyword(s):

Larval Development ◽

Sea Urchin ◽

Marine Invertebrates ◽

Parent Compound ◽

Paracentrotus Lividus ◽

Marine Species ◽

Negative Effects ◽

Aminomethylphosphonic Acid ◽

Main Degradation Product ◽

Herbicide Glyphosate

Despite the widespread use of herbicide glyphosate in cultivation, its extensive runoff into rivers and to coastal areas, and the persistence of this chemical and its main degradation product (aminomethylphosphonic acid, AMPA) in the environment, there is still little information on the potential negative effects of glyphosate, its commercial formulation Roundup® and AMPA on marine species. This study was conducted with the aim of providing a comparative evaluation of the effects of glyphosate-based and its derived chemicals on the larval development of the sea urchin Paracentrotus lividus, thus providing new data to describe the potential ecotoxicity of these contaminants. In particular, the effects on larval development, growth and metabolism were assessed during 48 h of exposure from the time of egg fertilization. The results confirm that AMPA and its parent compound, glyphosate have similar toxicity, as observed in other marine invertebrates. However, interestingly, the Roundup® formulation seemed to be less toxic than the glyphosate alone.

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