Pupal Epidermis
Pupal Epidermis - Related Videos
02:53
Insect Puparium Removal: A Method for Pupal Investigation
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2023
This article describes a technique to remove an insect’s puparium while keeping the inside pupa intact and therefore fit for further investigation. The example protocol shows the procedure with Drosophila guttifera; however, this technique is applicable to other Drosophila species.
01:24
Cells of the Epidermis
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2023
The epidermis is made of four or five layers of epithelial cells, depending on its location in the body. From deep to superficial, these layers are the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum. The cells in all these layers except the stratum basale are called keratinocytes, a type of cell that manufactures and stores the protein keratin. The keratinocytes in the stratum corneum are dead and regularly slough away, being replaced by cells from...
04:22
Live Imaging of the Drosophila Pupal Eye Using Fluorescence Microscopy
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2025
Source: Hellerman, M. B., et al. Live-imaging of the Drosophila Pupal Eye. J. Vis. Exp. (2015)The video demonstrates a live-imaging technique to study eye patterning in a Drosophila melanogaster pupa. Green fluorescent protein (GFP)-tagged markers enable visualization of cellular organization and differentiation during the formation of the developing eye structure.
01:21
Layers of the Epidermis
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2025
The epidermis, the outermost layer of the skin, is composed of several distinct layers. From deep to superficial, the layers of the epidermis are as follows: Stratum Basale Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
09:39
Live Imaging of Cell Extrusion from the Epidermis of Developing Zebrafish
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Cited by 20 •
2011
Dying cells are extruded from epithelial tissues by concerted contraction of neighboring cells without disrupting barrier function. The optical clarity of developing zebrafish provides an excellent system to visualize extrusion in living epithelia. Here we describe methods to induce and image extrusion in the larval zebrafish epidermis at cellular resolution.
FAQs
Ecdysone pulses act as hormonal timing signals that alter gene expression in epidermal cells. Those changes coordinate separation from the larval cuticle with production of replacement material, so the tissue changes behavior in a staged rather than isolated way. This timing links hormonal regulation to the visible remodeling of the insect body surface during metamorphosis.
Coordinated secretion supplies the structural ingredients of replacement cuticle: chitin and cuticular proteins. Their production allows epidermal cells to build pupal or adult surface layers after the larval cuticle is separated. This matters because cuticle synthesis helps preserve the pupal body while accommodating the surface changes required for adult development.
The tissue links hormonal timing to physical development. After hormone-responsive gene-expression changes, epidermal activity supports the development of adult structures while the body surface is remodeled. This connection makes pupal epidermis useful for studying how developmental signals produce coordinated tissue-level changes during the transition from a larval body to an adult form.
Studying pupal epidermis can reveal how insects coordinate molting, cuticle production, and body-pattern formation. Researchers can relate hormonal pulses to changes in epidermal gene expression, cuticle separation, and replacement-surface synthesis. These relationships provide developmental context for understanding how a larval body is reorganized into pupal and then adult form.
The pupal stage provides a developmental interval in which larval surface separation, hormonally regulated epidermal activity, and formation of pupal or adult cuticle can be considered together. Examining these linked events helps connect the timing of metamorphosis with remodeling of body surfaces and development of adult structures.
Because pupal epidermis responds to ecdysone and produces replacement cuticle, its regulated processes can be considered potential targets for managing agricultural pests or disease-vector species. Their importance comes from the tissue’s role in metamorphosis, where coordinated epidermal activity contributes to body-surface formation and adult development.