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| Content Provider | Springer Nature Link |
|---|---|
| Author | Tanigawa, Naoki Matsumoto, Keiji Yasuyama, Kouji Numata, Hideharu Shiga, Sakiko |
| Copyright Year | 2010 |
| Abstract | The band-legged ground cricket Dianemobius nigrofasciatus enters diapause at an early embryonic stage when adults are reared under short-day conditions or the eggs are exposed to a low temperature. We examined the morphological features of the embryo during early development and determined the exact stage of entry into diapause. In non-diapause eggs, no periplasmic space was observed in the surface region and a small number of nuclei surrounded by cytoplasm (energids) were found among the yolk granules and lipid droplets 12 h after egg laying (AEL) at 25°C. The energids sparsely but evenly populated the surface region at 40 h AEL, but there were some gaps between these energids. A continuous thin layer of nuclei with cytoplasm had completely covered the egg surface at 56 h AEL, suggesting that the blastoderm is formed between 40 and 56 h AEL. At 72 h AEL, we found a germ band at the posterior pole. Electron microscopy revealed clear cell membranes at 40 h AEL. Staining with rhodamine-dextran dye demonstrated that the cell membrane is formed when the nuclei appear on the egg surface at 12–24 h AEL. These results indicate that cellularization occurs before blastoderm formation. In diapause eggs, neither the embryonic rudiment nor germ band was formed, but a continuous layer of cells covered the egg surface. It is concluded that D. nigrofasciatus enters diapause at the cellular blastoderm. |
| Starting Page | 589 |
| Ending Page | 596 |
| Page Count | 8 |
| File Format | |
| ISSN | 0949944X |
| Journal | Development Genes and Evolution |
| Volume Number | 219 |
| Issue Number | 11-12 |
| e-ISSN | 1432041X |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2010-03-02 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Dianemobius nigrofasciatus Cricket Blastoderm Embryonic diapause Cellularization Animal Genetics and Genomics Neurosciences Biochemistry Cell Biology Developmental Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Developmental Biology |
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