Leaf midrib, light micrograph
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Leaf midrib, light micrograph
Leaf midrib. Light micrograph (LM) of a section through the midrib of a leaf from a monocotyledon plant. The midrib (midvein) is the continuation of a leafs stem along the centre of the leaf. At lower centre is a vascular bundle, which consists of primary xylem (large circles) and primary phloem (green, centre) tissues. Xylem transports water and mineral nutrients from the roots throughout the plant and phloem transports carbohydrate and hormones around the plant. Other, smaller, vascular bundles can also be seen to the left and to the right. The surface (epidermis) of the leaf is covered in a waxy cuticle (red) that helps to prevent water loss
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Media ID 6289005
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Axial Cellular Cross Section Cuticle Epidermis False Colour Histological Histology Mid Rib Phloem Spongy Mesophyll Stem Tissue Transverse Vascular Bundle Waxy Xylem Cells False Coloured Light Micrograph Light Microscope Section Sectioned
EDITORS COMMENTS
This print showcases the intricate beauty of a leaf midrib, providing us with a fascinating glimpse into the inner workings of a monocotyledon plant. The midrib, also known as the midvein, serves as the central axis along which a leaf's stem extends. In this light micrograph (LM), we can observe various essential components that contribute to the leaf's functionality. At the lower center of the image, we are presented with a prominent vascular bundle composed of primary xylem and primary phloem tissues. These vital structures play distinct roles in transporting water, mineral nutrients, carbohydrates, and hormones throughout the plant. Additional smaller vascular bundles can be observed on both sides. The surface of this leaf is adorned with an enchanting waxy cuticle depicted in red hues. This protective layer acts as a barrier against excessive water loss from evaporation. Through this false-colored LM image captured by Science Photo Library using advanced scanning electron microscopy techniques and histological staining methods, we gain insight into cellular structures such as palisade parenchyma and spongy mesophyll cells within the leaf tissue. Overall, this awe-inspiring photograph not only highlights nature's remarkable complexity but also emphasizes its delicate balance between form and function in sustaining life for these botanical wonders.
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