DB Gallery and Cinema:
Images of gastrulation...
It
is not birth, marriage, or death, but gastrulation,
which is truly the most important time in your life.
Gastrulation includes a series of morphogenetic movements that re-arrange the
animal embryo and and result in the establishment of the primary "germ
layers" from which tissues will develop and differentiate.
Gastrulation
in Xenopus laevis: This animation
begins with a fate map of the surface of a Xenopus embryo (dorsal side
to left), showing the animal cap (green); non-involuting marginal zone (NIMZ;
blue); involuting marginal zone (IMZ; yellow); presumptive bottle cells
(orange); and yolky vegetal base (light orange). The blue dotted line indicates
the limit of the prospective neural plate cells. It then cuts away to a sagital
view depicting the movements of cell layers during gastrulation:
Animal
cap:
green
NIMZ-S:
superficial
layer of the non-involuting marginal zone=lt blue.
NIMZ-D: deep layer of the non-involuting
marginal zone=blue.
IMZ-S:
superficial layer of the involuting marginal zone=yellow.
IMZ-D:
deep layer of the involuting marginal zone=red.
The
dorsal lip of the blastopore in Xenopus.
This time-lapse sequence of the dorsal lip
formation during early gastrulation in Xenopus (seen from the vegetal
pole) was taken by students of the Developmental Biology lab at the University
of Utah. QT
or AVI
(1.2 MB).
Gastrulation
in Xenopus. This
time-lapse sequence (taken by Ray Keller) shows gastrulation and neuralation
in Xenopus. QT
(2 MB) or AVI
(1.2 MB).
Morphs of Ray Kellerīs gastrulation maps
for Xenopus:
Surface view, showing convergent extension on dorsal
side and epiboly of ventral ectoderm (QT
or AVI;
< 0.5 MB).
Deep layer of IMZ (QT
or AVI
; 0.2 MB)
A morph of Xenopus gastrulation from
Steve Black and Mike Danilcik (dorsal on right; QT
or AVI; < 1 MB)?
Cleavage and gastrulation in Zebra fish:
this time-lapse movie extends from the 1 cell stage to 100% epiboly (~11 hrs
elapsed time). Used with permission of Dr. Paul Myers (Temple University;
http://fishnet.bio.temple.edu).
QT
or AVI (~ 2 MB)
Vegetal
views of gastrulation: This time-lapse sequence of the gastrulation
in Xenopus (seen from the vegetal pole) was taken by students of the
Developmental Biology lab at the University of Utah. Sequence 1: QT
or AVI
(1.2 MB). Sequence
2: AVI (2 MB).
