Die Embryonalentwicklung der Paradiesschnecke ... - TOBIAS-lib

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Kapitel 4 Fig. 1: Histological sections of C1, P1 and P2; A: C1, saggital section, right lateral view; B: P1, saggital section, left lateral view; C: Sagittal section of P2, left lateral view, asterisk indicates a protrusion of the alimentary system; D: P2, sagittal section of the visceral sac, same individual as in C; A, alimentary tract; CG: cerebral ganglion; CML, columellar muscle; CN: ctenidium; DG: digestive gland; F, foot; K, kidney; MTC, mantle cavity; MTE, mantle edge; O, odontophor; OSG, osphradial ganglion; PG, pedal ganglion; R, radula; SHG, shell gland Fig. 2C-F are not restrained by a solid external structure that shapes their bodies. As snails are both soft and, to some extent, flexible, the relative positions of the organs and tissues can somewhat vary. Although this is the case, there are distinct common features that both sluggish snails share: compared to C1 they both seem to be compressed along the middle axis (see also Figs. 3 and 4) and the visceral sac does not have a distinct form at all but is simply bulky. Both snails do not show a mantle cavity and also a conventional ureter, as the kidney seems to open directly into the outer medium. As previously described (Marschner et al., 2012), the shell secreting shell gland and the adjacent mantle edge (not indicated separately) remain on the ventral side of the visceral sac. This shell-secreting complex is ringshaped and encircles the mantle rudiment and, later, the (internally located) mantle which secretes calcium carbonate. As can be seen in the histological sections and in the reconstructions, this ring-shaped complex is still posi- 114
Kapitel 4 tioned on the ventral side of the visceral sac. Previous studies showed that the mantle epithelium, encircled by shell gland and mantle edge, is enfolded into the inside of the snail (Marschner et al., 2012; 2013). Furthermore, the 3D models of the PtCl 2 -exposed snails show that, during further growth, the digestive gland pushes the mantle epithelium ventrad until digestive gland, mantle, and internal shell (not shown in the models) protrude out of the ring formed by shell gland and mantle edge. Fig. 2: Complete 3D models; A: C1, left lateral view; B: K1, right lateral view; C: P1, left lateral view; D: P1, right lateral view; E: P2, left lateral view; F: P2, right lateral view; A, alimentary tract; AN, anus; CML, columellar muscle; CN: ctenidium; DG: digestive gland; E, eye; F, foot; HE, heart; K, kidney; N, nervous tissue; O, odontophor; R, radula; SHG, shell gland; U, ureter 115
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Die Embryonalentwicklung der Paradi
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Inhaltsverzeichnis Zusammenfassung
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Zusammenfassung Hintergrund und Zie
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Hintergrund und Zielsetzung der Arb
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Hintergrund und Zielsetzung der Arb
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Material und Methoden Marisa cornua
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Material und Methoden Hälterung Di
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Material und Methoden lindividuen a
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Ergebnisse lung von Marisa cornuari
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Ergebnisse Kapitel 3: Marschner, L.
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Ergebnisse Wachstum des Columellamu
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Diskussion Naticidae) entwickelt si
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Diskussion engrailed und dpp-BMP2/4
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Diskussion Abb. 4: Vergleich der mi
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Schlussfolgerung perimentell zu unt
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Literatur Engelhardt, W. (2008). Wa
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Literatur Ponder, W. F. und Lindber
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Kapitel 1:Turning snails into slugs
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Kapitel 1 dae). Their ontogeny also
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Kapitel 1 Exposure experiments Test
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Kapitel 1 et al. (2001, 2003) or wi
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Kapitel 1 for 4 × 5 min with PTw (
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Kapitel 1 treatment 29.9 ± 32.78%
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Kapitel 1 Fig. 2 3 : Images of M. c
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Kapitel 1 Fig. 4 4 : Location of th
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Kapitel 1 internal solid circular s
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Kapitel 1 ietis as it was shown for
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Kapitel 1 Burnett, L.E., Woodson, P
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Kapitel 1 Page, L.R., 2002. Ontogen
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Kapitel 2: Arresting mantle formati
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Kapitel 2 tropods (Crofts, 1937, su
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Kapitel 2 Scanning electron microsc
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Kapitel 2 called “mantle anlage
Page 67 and 68: Kapitel 2 Fig. 2: M. cornuarietis,
Page 69 and 70: Kapitel 2 and the visceral sac rema
Page 71 and 72: Kapitel 2 Seven-day-old embryos At
Page 73 and 74: Kapitel 2 Fig. 7: M. cornuarietis,
Page 75 and 76: Kapitel 2 gation of internal shells
Page 77 and 78: Kapitel 2 first tended to invaginat
Page 79 and 80: Kapitel 2 side of the visceral sac
Page 81 and 82: Kapitel 2 cornuarietis (Mesogastrop
Page 83 and 84: Kapitel 3: External and internal sh
Page 85 and 86: Kapitel 3 during embryonic developm
Page 87 and 88: Kapitel 3 Differential growth of ma
Page 89 and 90: Kapitel 3 sac, facing away from the
Page 91 and 92: Kapitel 3 Fig. 4 9 : SEM-images of
Page 93 and 94: Kapitel 3 Fig. 6: Histological sect
Page 95 and 96: Kapitel 3 side of the visceral sac
Page 97 and 98: Kapitel 3 different mechanism that
Page 99 and 100: Kapitel 3 whether the inhibition of
Page 101 and 102: Kapitel 3 tinuum of gradual morphol
Page 103 and 104: Kapitel 3 served one. However, ther
Page 105 and 106: Kapitel 3 hand and modified in Inks
Page 107 and 108: Kapitel 3 ticipated in designing th
Page 109 and 110: Kapitel 3 Demian, E. S. and Yousif,
Page 111 and 112: Kapitel 3 Page, L. R. (2003). Gastr
Page 113 and 114: Kapitel 4 Herewith, we were able to
Page 115 and 116: Kapitel 4 Histology and 3D reconstr
Page 117: Kapitel 4 72 or 96 hours at 6 ◦ C
Page 121 and 122: Kapitel 4 P2 does not curve backwar
Page 123 and 124: Kapitel 4 which this nerve is attac
Page 125 and 126: Kapitel 4 Fig. 5 13 : 3D reconstruc
Page 127 and 128: Kapitel 4 system in which the right
Page 129 and 130: Kapitel 4 ready present during tors
Page 131 and 132: Kapitel 4 Haydon, P. G., McCobb, D.
Page 133 and 134: Kapitel 5: Quantifikation der Hsp70
Page 135 and 136: Kapitel 5 Die Gesamtproteinmenge wu
Page 137 and 138: Kapitel 5 steigt mit steigendem pro
Page 139 and 140: Kapitel 5 Piano, A., Valbonesi, P.,
Page 141 and 142: Publikationsliste • Marschner, L.
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