Results 11 to 20 of about 138,368 (322)

The effects of sugars and growth regulators on embryo- and callusogenesis in isolated ovules culture of beetroot, Beta vulgaris L. [PDF]

open access: yesCaspian Journal of Environmental Sciences, 2021
Haploid techniques have risen interest among researchers and breeders as they significantly reduce the time of creating pure lines in breeding programs, especially for biennial vegetable crops.
Tamara Ruslanovna Grigolava   +4 more
doaj   +1 more source

Regulatory principles governing the maternal-to-zygotic transition: insights from Drosophila melanogaster [PDF]

open access: yesOpen Biology, 2018
The onset of metazoan development requires that two terminally differentiated germ cells, a sperm and an oocyte, become reprogrammed to the totipotent embryo, which can subsequently give rise to all the cell types of the adult organism.
Danielle C. Hamm, Melissa M. Harrison
doaj   +1 more source

External and internal parasitic conjoined twinning: Diverse presentation and different surgical challenges

open access: yesAfrican Journal of Paediatric Surgery, 2022
Background: Parasitic conjoined twin is a rare but well-known entity with unclear embryopathogenesis. Abnormal conjoined twinning can result in an externally attached parasitic twin (PT), an enclosed foetus in foetu, or a mature teratoma.
Prema Menon   +6 more
doaj   +1 more source

A mathematical modelling portrait of Wnt signalling in early vertebrate embryogenesis [PDF]

open access: yesJournal of Theoretical Biology 551-552 (2022) 111239, 2022
There are two phases of Wnt signalling in early vertebrate embryogenesis: very early, maternal Wnt signalling promotes dorsal development, and slightly later, zygotic Wnt signalling promotes ventral and lateral mesoderm induction. However, recent molecular biology analysis has revealed more complexity among the direct Wnt target genes, with at least ...
arxiv   +1 more source

Virtual spherical-shaped multicellular platform for simulating the morphogenetic processes of spider-like body axis formation

open access: yesFrontiers in Cell and Developmental Biology, 2022
Remodeling of multicellular architecture is a critical developmental process for shaping the axis of a bilaterally symmetric animal body and involves coordinated cell–cell interactions and cell rearrangement.
Motohiro Fujiwara   +5 more
doaj   +1 more source

Maternally inherited piRNAs direct transient heterochromatin formation at active transposons during early Drosophila embryogenesis

open access: yeseLife, 2021
The PIWI-interacting RNA (piRNA) pathway controls transposon expression in animal germ cells, thereby ensuring genome stability over generations.
Martin H Fabry   +5 more
doaj   +1 more source

Cell Shape and Cell Lineage Conversion

open access: yesThe Journal of Poultry Science, 2015
The organization of animal cells in vivo can be categorized as being either epithelial or mesenchymal. Inter-conversions between these two states, epithelial-mesenchymal transition (EMT) and mesenchymal-epithelial transition (MET), often represent key ...
Yukiko Nakaya, Guojun Sheng
doaj   +1 more source

Five Transcription Factors and FGF Pathway Inhibition Efficiently Induce Erythroid Differentiation in the Epiblast

open access: yesStem Cell Reports, 2014
Primitive erythropoiesis follows a stereotypic developmental program of mesoderm ventralization and internalization, hemangioblast formation and migration, and erythroid lineage specification.
Wei Weng, Guojun Sheng
doaj   +1 more source

A case series study of omphalocele with associated anomalies: An embryogenic imperfection

open access: yesNational Journal of Clinical Anatomy, 2022
Omphalocele is a developmental aberration which occurs during embryonic period in the fetal life. The fault in complete closure of the anterior abdominal wall leading to protrusion of the abdominal viscera mainly the small and large intestines with the ...
Kasturi Kshitija   +3 more
doaj   +1 more source

Characterization of the finch embryo supports evolutionary conservation of the naive stage of development in amniotes

open access: yeseLife, 2015
Innate pluripotency of mouse embryos transits from naive to primed state as the inner cell mass differentiates into epiblast. In vitro, their counterparts are embryonic (ESCs) and epiblast stem cells (EpiSCs), respectively.
Siu-Shan Mak   +7 more
doaj   +1 more source

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