Results 131 to 140 of about 7,571 (179)

Domains of movement in the zebrafish gastrula

Seminars in Developmental Biology, 1994
Abstract The mechanisms controlling cell movements during vertebrate gastrulation are not known. Studies using the zebrafish embryo show promise at identifying these mechanisms, combining an embryo that is accessible and optically clear with mutations that affect early development.
Donald A. Kane, Rachel M. Warga
openaire   +1 more source

Cell adhesion to extracellular matrix in normal Rana pipiens gastrulae and in arrested hybrid gastrulae Rana pipiens ♀ × Rana esculenta ♂

Developmental Biology, 1990
Rana pipiens eggs fertilized by Rana esculenta sperm (ESC) hybrid embryos develop until gastrulation in control Rana pipiens embryos (PIP) and then show morphogenetic arrest. After arrest, ESC do not gastrulate but live for 5 days as blastula-like embryos.
K E, Johnson, T, Darribère, J C, Boucaut   +2 more
openaire   +2 more sources

Further studies of differentiation of cells from hybrid gastrulae

Developmental Biology, 1968
Abstract The hypothesis was tested that low molecular weight inhibitors are made within cells of a lethal hybrid embryo prepared by fertilizing eggs of Rana pipiens with sperm of Rana sylvatica . Cell aggregates from the marginal zone of diploid pipiens gastrulae were treated in standard solution containing bisected hybrid gastrulae.
L J, Barth, L G, Barth
openaire   +2 more sources

Potenzprüfungen an der Gastrula

1936
Zu Beginn der Gastrulation sind, wie wir gesehen haben, die einzelnen Bezirke des Amphibienkeims schon weitgehend determiniert, sowohl dynamisch wie materiell. Der jungen Gastrula ist ein Muster von Entwicklungstendenzen aufgepragt, nach welchem die Gestaltungs-bewegungen wie die gewebliche Differenzierung ablaufen.
openaire   +1 more source

On the invagination of the gastrula

Protoplasma, 1930
An experimental study of the problem of gastrulation has yielded evidence which shows that the present prevailing theories are inadequate to account for the facts.
openaire   +1 more source

Extracellular Materials and Determination of Neuroectoblast in Amphibian Gastrula

Pathobiology, 1988
The biological activity of the extracellular material (ECM) located in the dorsal and ventral regions of <i>Bufo arenarum </i>is assayed. Ectoblast cells were isolated and cultured with ECM taken from the embryonal regions. The epiblastic cells treated with dorsal ECM, mainly located at the interphase between the invaginating blastoporal ...
S S, Sánchez, F D, Barbieri
openaire   +2 more sources

Pre-gastrula Development of Non-eutherian Mammals

2018
Marsupials and monotremes differ from eutherian mammals in many features of their reproduction and development. Some features appear to be representative of transitional stages in evolution from therapsid reptiles to humans and mice, particularly with respect to the extraembryonic tissues that have undergone remarkable modifications to accommodate ...
openaire   +2 more sources

Characterization of small RNAs in X. tropicalis gastrulae

genesis, 2012
AbstractHere, we report and characterize deep sequencing data and bioinformatics analysis of small RNAs from X. tropicalis gastrula. A total of 17,553,124 reads with perfect match to the genome derived from 2,616,053 unique sequences were identified. Seventy‐seven percent of theses sequences were not found in previous reports from X. tropicalis oocytes
Fernando, Faunes, Leonardo I, Almonacid, Francisco, Melo, Juan, Larrain   +3 more
openaire   +2 more sources

Ruffling and locomotion in Rana pipiens gastrula cells

Experimental Cell Research, 1976
Abstract Embryonic amphibian cells move during gastrulation, even though they are in contact with many neighboring cells. The behavior of these cells in vitro with respect to cell movement and contact inhibition is thus of interest. Cultures of isolated presumptive mesodermal cells of early Rana pipiens gastrulae were sealed with a coverslip and ...
openaire   +2 more sources

Blastulas, Gastrulas and the First Animals

2003
A blastula consists of similar, non-specialized cells resulting from divisions of a metazoan egg. Most metazoans go through such a phase in their early development, and it is widely assumed that the blastula represents an early phase in animal evolution.
openaire   +1 more source