6533b861fe1ef96bd12c5694
RESEARCH PRODUCT
An Incremental Analysis of the Embryonic Development of the Tobacco Hornworm,Manduca sexta
Stephen T. BishoffAugust DornLawrence I. Gilbertsubject
EmbryogenesisOrganogenesisCell BiologyAnatomyBiologyProthoracic glandbiology.organism_classificationEmbryonic stem cellDorsal closureGastrulationManduca sextaAnimal Science and ZoologyBlastodermDevelopmental Biologydescription
Summary A timetable of the embryonic development of Manduca sexta has been compiled to serve as a basis for physiological studies. Embryogenesis is complete within 117 hr at 24° C and was analyzed by examining specimens representing 20 stages, i.e. intervals of 5% of the total developmental time. Stage 0 denotes the newly deposited egg. Germ band formation, gastrulation, differentiation of tissues and organs, and blastokinesis are described in detail. By stage 1 (6 hr post-oviposition) the cellular blastoderm is evident and the presumptive serosal and embryonic cells are distinguishable. At stage 2 the germ band has separated from the blastoderm, and by stage 3 it has elongated enormously, segregated the inner layer and is completely segmented. Subsequently, the segmental appendages differentiate: at first in the head, then in the thorax, and finally in the abdomen (prolegs). Stage 5 marks the onset of organogenesis while blastokinesis takes place at stage 8. A provisional but incomplete dorsal closure oc...
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1987-03-01 | International Journal of Invertebrate Reproduction and Development |