Studies on the yolk granules of the silkworm,Bombyx mori L.: The morphology of diapause and non-diapause eggs during early developmental stages

1976 ◽  
Vol 180 (2) ◽  
pp. 93-105 ◽  
Author(s):  
Sachiko Takesue ◽  
Hiroomi Keino ◽  
Katsuhiko Endo
Keyword(s):  
Bombyx Mori ◽  
Developmental Stages ◽  
Yolk Granules ◽  
Early Developmental Stages ◽  
Bombyx Mori L ◽  
Early Developmental ◽  
Silkworm Bombyx Mori

Immunocytochemical location of vitellin in the egg of the silkworm,Bombyx mori, during early developmental stages

1983 ◽  
Vol 192 (3-4) ◽  
pp. 113-119 ◽  
Author(s):  
Sachiko Takesue ◽  
Kazuo Onitake ◽  
Hiroomi Keino ◽  
Yoshiki Takesue
Keyword(s):  
Bombyx Mori ◽  
Developmental Stages ◽  
Early Developmental Stages ◽  
Early Developmental ◽  
Silkworm Bombyx Mori

Developmental stages of ovarian follicles of the silkworm,Bombyx mori L

1984 ◽  
Vol 179 (1) ◽  
pp. 21-31 ◽  
Author(s):  
Hideo Yamauchi ◽  
Narumi Yoshitake
Keyword(s):  
Bombyx Mori ◽  
Developmental Stages ◽  
Ovarian Follicles ◽  
Bombyx Mori L ◽  
Silkworm Bombyx Mori

Blastoderm formation in the silkworm egg (Bombyx mori L.)

Development ◽  
1980 ◽  
Vol 60 (1) ◽  
pp. 117-124
Author(s):  
Sachiko Takesue ◽  
Hiroomi Keino ◽  
Kazuo Onitake
Keyword(s):  
Plasma Membrane ◽  
Light Microscopy ◽  
Special Reference ◽  
Bombyx Mori ◽  
Initial Level ◽  
Insect Species ◽  
Yolk Granules ◽  
Bombyx Mori L ◽  
Blastoderm Cell ◽  
Silkworm Bombyx Mori

Embryogenesis in the egg of the silkworm, Bombyx mori, up to 24 h after oviposition was studied, by light microscopy with special reference to nuclear migration and blastoderm formation. In Bombyx eggs blastoderm cells seem to form in a mechanism different from that usually seen in many other insect species; that is, in Bombyx eggs no typical cleavage furrows were seen. Cleavage nuclei which had migrated, accompanied by the associated cytoplasm, to the egg surface pushed up the plasma membrane and protruded beyond the initial level of the periplasm. The periplasm fused with their associated cytoplasm was partitioned among and pulled around the nuclei. Then each nucleus was separated by a laterally-invading limiting membrane from the yolk-granules-occupied region to yield a blastoderm cell.

Review of early developmental stages of trilobites and agnostids from the Barrandian area (Czech Republic)

2017 ◽  
Vol 186 (1) ◽  
pp. 103-112
Author(s):  
Lukáš Laibl ◽  
Oldřich Fatka
Keyword(s):  
Czech Republic ◽  
Developmental Stages ◽  
History Of Research ◽  
Early Developmental Stages ◽  
History Of ◽  
Barrandian Area ◽  
Early Developmental

This contribution briefly summarizes the history of research, modes of preservation and stratigraphic distribution of 51 trilobite and five agnostid taxa from the Barrandian area, for which the early developmental stages have been described.

scholarly journals The Effect of an Anthropogenic Magnetic Field on the Early Developmental Stages of Fishes—A Review

2021 ◽  
Vol 22 (3) ◽  
pp. 1210
Author(s):  
Krzysztof Formicki ◽  
Agata Korzelecka-Orkisz ◽  
Adam Tański
Keyword(s):  
Magnetic Fields ◽  
Developmental Stages ◽  
Negative Influence ◽  
Pigment Cells ◽  
Egg Activation ◽  
Industrial Equipment ◽  
Positive Effects ◽  
Early Developmental Stages ◽  
Species Specific ◽  
Early Developmental

The number of sources of anthropogenic magnetic and electromagnetic fields generated by various underwater facilities, industrial equipment, and transferring devices in aquatic environment is increasing. These have an effect on an array of fish life processes, but especially the early developmental stages. The magnitude of these effects depends on field strength and time of exposure and is species-specific. We review studies on the effect of magnetic fields on the course of embryogenesis, with special reference to survival, the size of the embryos, embryonic motor function, changes in pigment cells, respiration hatching, and directional reactions. We also describe the effect of magnetic fields on sperm motility and egg activation. Magnetic fields can exert positive effects, as in the case of the considerable extension of sperm capability of activation, or have a negative influence in the form of a disturbance in heart rate or developmental instability in inner ear organs.

scholarly journals Mitochondrial Processes during Early Development of Dictyostelium discoideum: From Bioenergetic to Proteomic Studies

Genes ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 638
Author(s):  
Monika Mazur ◽  
Daria Wojciechowska ◽  
Ewa Sitkiewicz ◽  
Agata Malinowska ◽  
Bianka Świderska ◽  
...  
Keyword(s):  
Life Cycle ◽  
Developmental Stages ◽  
Coupling Efficiency ◽  
Slime Mold ◽  
Intact Cells ◽  
Life Cycle Stages ◽  
Early Developmental Stages ◽  
Proteomic Study ◽  
And Function ◽  
Early Developmental

The slime mold Dictyostelium discoideum’s life cycle includes different unicellular and multicellular stages that provide a convenient model for research concerning intracellular and intercellular mechanisms influencing mitochondria’s structure and function. We aim to determine the differences between the mitochondria isolated from the slime mold regarding its early developmental stages induced by starvation, namely the unicellular (U), aggregation (A) and streams (S) stages, at the bioenergetic and proteome levels. We measured the oxygen consumption of intact cells using the Clarke electrode and observed a distinct decrease in mitochondrial coupling capacity for stage S cells and a decrease in mitochondrial coupling efficiency for stage A and S cells. We also found changes in spare respiratory capacity. We performed a wide comparative proteomic study. During the transition from the unicellular stage to the multicellular stage, important proteomic differences occurred in stages A and S relating to the proteins of the main mitochondrial functional groups, showing characteristic tendencies that could be associated with their ongoing adaptation to starvation following cell reprogramming during the switch to gluconeogenesis. We suggest that the main mitochondrial processes are downregulated during the early developmental stages, although this needs to be verified by extending analogous studies to the next slime mold life cycle stages.

Portrayal of an effective tannase producer in the gut of Silkworm Bombyx mori. L

2021 ◽  
pp. 100092
Author(s):  
Jeyaraj Pandiarajan ◽  
Muthukalingan Krishnan
Keyword(s):  
Bombyx Mori ◽  
Bombyx Mori L ◽  
Silkworm Bombyx Mori
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