| Autor: |
De Lisa, Emilia, Maria Salzano, Anna, Moccia, Francesco, Scaloni, Andrea, Di Cosmo, Anna |
| Předmět: |
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| Zdroj: |
Journal of Experimental Biology; Jun2013, Vol. 216 Issue 12, p2229-2237, 9p |
| Abstrakt: |
Marine invertebrates exhibit both chemokinesis and Chemotaxis phenomena, induced in most cases by the release of water-borne peptides or pheromones. In mollusks, several peptides released during egg-laying improve both male attraction and mating. Unlike other cephalopods, Octopus vulgaris adopts an indirect internal fertilization strategy. We here report on the identification and characterization of a chemoattractant peptide isolated from mature eggs of octopus females. Using two-chamber and timelapse microscopy assays, we demonstrate that this bioactive peptide is able to increase sperm motility and induce Chemotaxis by changing the octopus spermatozoa swimming behavior in a dose-dependent manner. We also provide evidence that Chemotaxis in the octopus requires the presence of extracellular calcium and membrane protein phophorylation at tyrosine. This study is the first report on a sperm-activating factor in a non-free-spawning marine animal. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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