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Post fertilization changes in Discoglossus pictus (Anura) eggs result in the formation of a capsular chamber where the egg rotates

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Academic year: 2020

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Figure

Fig. 1. Egg of Discoglossuspictusvitally stainedwith toluidineblue.J3== jelly3; J;=jelly2; J)=jellyI; VE ==vitelline envelope.(AI Unfertilizeduterineegg
Fig. 3. Resin-embeddedsectionspositive.stainedwithPAS.(AI Egg at the onsetof the plug liquefyingreaction.Theextracellularmarerialindicatedby thea((owis the dimplecontent(DC) whichoccupiesmostofcheconcavIty,i.e.
Fig. 4. Vacuolesinvolvedin exocytosis.(AI Two classesof vacuoles can be seen in the dimple about 12min after ferrilization.They are located at theegg periphery, and especially beneath the plasma membrane
Fig. 5. ExocytosedmaterialIndunng plug liquefaction.on the egg surfaceand investments.(AI Small aggregatesof electron-densematerial (arrows) can be observednext tothe plasmamembrane.(x27.000J.(B) The exocytosedmaterialis also presentin electron-transparent

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