Jasminum nudiflorum Leaf Under the Microscope
Jasminum nudiflorum Leaf (Transverse Section), Jasminum nudiflorum
This is a cross section of a winter jasmine leaf stained with fast green. It shows the layered structure of a typical dicot leaf, with food-making cells on top and air spaces below.
A transverse section of a winter jasmine leaf (Jasminum nudiflorum T.S.) stained with Fast Green, demonstrating the classic bifacial dorsiventral internal architecture of a dicotyledonous lamina. Upper and lower surfaces are bounded by single-layered epidermal cells coated with a protective cuticle layer. Beneath the adaxial epidermis lies elongated, tightly packed palisade mesophyll cells specialized for light absorption during photosynthesis. The abaxial region comprises loosely arranged spongy mesophyll parenchyma with prominent intercellular air spaces that facilitate internal gas exchange. Embedded within the mesophyll layer, small vascular bundles containing lignified xylem vessels and phloem elements provide structural support and fluid transport across the leaf blade.
What to look for
- Cuticle: A thin waxy coating on the outer surface of the epidermis.
- Upper and lower epidermis: Single layers of cells on the top and bottom surfaces.
- Palisade mesophyll: Tall, tightly packed cells just under the upper epidermis.
- Spongy mesophyll: Loosely packed cells with air spaces, above the lower epidermis.
- Vascular bundles: Small veins with xylem and phloem running through the mesophyll.
At each magnification
Low power (about 4x)
The long leaf blade with its veins.
Medium power (about 10x)
The palisade and spongy layers.
High power (about 40x)
Individual palisade cells and air spaces in the spongy layer.
Questions and answers
What are the layers of a dicot leaf under a microscope?
A dicot leaf has an upper epidermis with a waxy cuticle, a palisade layer of tall packed cells, a spongy layer with air spaces, and a lower epidermis. Veins with xylem and phloem run through the middle layers.
Why does the spongy mesophyll have air spaces?
The air spaces let carbon dioxide, oxygen, and water vapor move through the leaf. They connect to the stomata, mostly on the underside, where gases enter and leave.
- Category
- Botany & Plants
- Scan magnification
- 20x
- Stain
- Fast Green
- Tags
- Jasminum nudiflorum leaf, Jasminum nudiflorum, winter jasmine, dorsiventral leaf, leaf transverse section, palisade mesophyll
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