Phloem Collection

Vascular bundle, SEM
Vascular bundle. Coloured scanning electron micrograph (SEM) of a section through a vascular bundle from a rootlet of a dicotyledon plant

Lime tree stem, light micrograph
Lime tree stem. Light micrograph of a section through the stem of a lime tree (Tilia europaea). The outer epidermis has been shed and replaced by a layer of cork (dark red)

Maize root, light micrograph
Maize root. Light micrograph of a section through the root of a maize plant (Zea mays) showing a vascular cylinder (centre)

Water lily leaf, light micrograph
Water lily leaf. Light micrograph of a transverse section through the leaf of a water lily (Nympha sp.) plant. All aquatic plants (hydrophytes) have a similar structure

Silver birch twig, SEM
Silver birch twig. Coloured scanning electron micrograph (SEM) of a section through a silver birch (Betula pendula) twig. At the centre of the twig (top centre left) is the pith

Water fern rhizome, light micrograph
Water fern rhizome. Polarised light micrograph of a section through a rhizome from a water fern (Marselia vestita). Under the epidermis (the outer layer)

Pine tree stem, light micrograph
Pine tree stem. Coloured light micrograph of a cross-section through the stem of a pine tree. (Pinus sp.). The red wood (xylem, lower left) has resin canals in it, which are outlined in green

Tomato leaf, light micrograph
Tomato leaf. Light micrograph of a transverse section through the midrib of a tomato (Lycopersicum esculentum) leaf. The upper and lower epidermis on the surfaces of the leaf are blue

Illustration of cross-section through leaf, showing upper epidermis, palisade mesophyll, xylem vesse

Section through leaf of marram grass
Marram grass leaf. Coloured scanning electron micrograph (SEM) of a transverse section through a leaf of marram grass, Ammophila arenaria

Iris root, light micrograph
Iris root. Light micrograph of a section through the root of an Iris plant (Iris germanica) showing a vascular cylinder. The cylinder is comprised of a central cluster of parenchyma cells (red)

Leaf veins of ivy
Macrophotograph of a leaf skeleton of the ivy plant, Hedera helix. showing the branching pattern & decreasing size of the veins (vascular tissue)

Bletia purpurea - Bletia purpurea. Longidunal and traverse section of the ovary. Watercolour by Franz Bauer, 1801. Paper, watercolour. Botany Library, Bauer Unit, Unfinished Drawings of Plants 3: no

Plant vascular bundle, illustration C018 / 0915
Plant vascular bundle. Illustration showing the structure of vascular bundle from a monocotyledon root. At centre (top) is the pith

Bamboo stem, SEM C015 / 5073
Bamboo stem. Coloured environmental scanning electron micrograph (ESEM) of a section through the stem of a bamboo plant (family Gramineae), showing a vascular bundle

Thin section of plant stem C016 / 9736
Photomicrograph of thin transverse section of Bamboo, shows water conducting xylem and phloem. Magnification at sensor X24 Differential Inerference Contrast

Dicotyledon vascular bundle, SEM C016 / 9603
Dicotyledon vascular bundle. Coloured scanning electron micrograph (SEM) of a section through a vascular bundle from a dicotyledonous plant

Dicotyledon vascular bundle, SEM C016 / 9602
Dicotyledon vascular bundle. Coloured scanning electron micrograph (SEM) of a section through a vascular bundle from a dicotyledonous plant

Thin section of plant stem C016 / 9740
Photomicrograph of thin transverse section of Bamboo, shows water conducting xylem and phloem. Magnification at sensor X24 Differential Inerference Contrast

St Johns wort leaf, light micrograph
St Johns wort leaf. Light micrograph of a section through a St Johns wort (Hypericum sp.) leaf. The leafs midrib is at left, with the vascular bundle at its centre

Groundsel stem, light micrograph
Groundsel stem. Light micrograph of a section through a groundsel stem (Senecio vulgaris), showing xylem vessels (brown, upper centre)

Leafhopper feeding. Artwork of a leafhopper (Eupteryx aurata) with its mouthparts inserted in the phloem of a nettle leaf vein (Urtica sp.). The leafhopper is drinking the sap from the nettle leaf

Cotton stem, light micrograph
Cotton stem. Light micrograph of a cross-section through a cotton (Gossypium sp.) stem. There is a large area of central pith surrounded by secondary xylem (light green)

Fern leaf, light micrograph
Fern leaf. Light micrograph of a transverse section through the midrib of a fern leaf. A vascular bundle is at centre. Magnification: x40 when printed at 10 centimetres wide

Nasturtium stem, SEM
Nasturtium stem. Coloured scanning electron micrograph (SEM) of a freeze-fractured Nasturtium (Tropaeolum sp.) stem, showing numerous vascular bundles (such as at upper centre)

Olive leaf, light micrograph
Olive leaf. Light micrograph of a section through the mid rib of an olive leaf (Olea sativa). It has a thickened epidermis for water retention

Peanut stem, light micrograph
Peanut stem. Light micrograph of a section through a peanut stem (Arachis hypogaea). The central pith is blue. Xylem is red and phloem is black. Magnification: x60 when printed at 10 centimetres wide

Grape stem, light micrograph
Grape stem. Light micrograph of a section through a grape stem. At top right is the pith (blue), surround that is the xylem (purple) and then the phloem (red)

Sago palm leaf, light micrograph
Sago palm leaf. Light micrograph of a transverse section through a sago palm (Cycas revoluta) leaf. It has a thick epidermis (outer red layer) typical of drought resistant plants

Water lily stem, SEM
Water lily stem. Coloured scanning electron micrograph (SEM) of a freeze-fractured water lily stem showing numerous vascular bundles (grey) and large intercellular air spaces (holes)

Wood, SEM
Wood. Coloured scanning electron micrograph (SEM) of a section through wood showing the phloem vessels (dark green holes) and xylem tissue (lower frame)

Acorus calamus rhizome, light micrograph
Acorus calamus rhizome. Light micrograph of a section through a rhizome from a sweet flag (Acorus calamus) plant. The rhizome has an outer layer with scattered collateral vascular bundles

Dracaena draco stem, light micrograph
Dracaena draco stem. Light micrograph of a section through the stem of a young dragon tree (Dracaena draco). Shown here is an outer ring of vascular bundles, containing phloem (blue) and xylem (red)

Wheat leaf, light micrograph
Wheat leaf. Light micrograph of a section through a leaf from a common wheat (Triticum aestivum) plant. The vascular bundle (centre to upper centre), or vein

Common rush stem, light micrograph
Common rush stem. Light micrograph of a section through the stem of a common rush (Juncus conglomeratus) plant, showing stellate cells

Dendrobium orchid root, light micrograph
Dendrobium orchid root. Light micrograph of a section through an aerial root from a Dendrobium sp. orchid. The outer tissue (velamen radicum, grey) is composed of hexagonal cells

Sharp rush stem, light micrograph
Sharp rush stem. Light micrograph of a section through the stem of a sharp rush (Juncus acutus) plant. This arid-adapted plant (xerophyte) has scattered vascular bundles

Ammophila arenaria leaf, light micrograph
Ammophila arenaria leaf. Polarised light micrograph of a section through a marram grass (Ammophila arenaria) leaf, showing the characteristics that help reduce water loss

Beech tree leaf, light micrograph
Beech tree leaf. Light micrograph of a section through the leaf of a common beech tree (Fagus sylvatica), showing the midrib

Marrow stem, light micrograph
Marrow stem. Light micrograph of a section through the stem of a marrow (Curcurbita sp.), showing the sieve plates in the phloem. A single collateral vascular bundle can be seen

Sycamore leaf vein, light micrograph
Sycamore leaf vein. Light micrograph of a section through the midrib (vein) of a leaf from a sycamore (Acer pseudoplatanus) tree

Geranium stem, light micrograph
Geranium stem. Light micrograph of a section through a young stem of a geranium (Pelargonium sp.) plant. The outer stem is covered with a thin epidermis (red) which has stomata

Sweet pea stem, light micrograph
Sweet pea stem. Light micrograph of a section through the hollow stem of a sweet pea (Lathyrus odoratus) plant, showing a ring of vascular bundles

Sage stem, light micrograph
Sage stem. Light micrograph of a section through a primary stem of a scarlet sage (Salivia splendens) plant. The outer stem is covered with a thin epidermis (green) that contains stomata

Rhubarb root, light micrograph
Rhubarb root. Light micrograph of a section through the root of a rhubarb (Rheum sp.) plant. The primary cortex has been shed by the formation of a circular meristem, the periderm

Oak root, light micrograph
Oak root. Light micrograph of a section through a secondary root from an oak (Quercus sp.) tree. The primary cortex (outer layer) has been shed by the formation of a circular meristem, the periderm

White bryony stem, light micrograph
White bryony stem. Light micrograph of a transverse section through the stem of a white bryony (Bryonia alba) plant, showing a single collateral vascular bundle

Beech tree leaves, light micrograph
Beech tree leaves. Light micrograph of a section through two leaves from different parts of a common beech tree (Fagus sylvatica)

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Phloem, the intricate network of vascular bundles responsible for transporting nutrients and sugars throughout plants, is a fascinating subject to explore. Through scanning electron microscopy (SEM) and light micrographs, we can delve into the hidden world in various plant species. In a lime tree stem, a light micrograph reveals the delicate structure cells intertwined within the vascular bundle. These specialized cells form sieve tubes that efficiently transport organic compounds from leaves to other parts of the plant. Similarly, in a maize root captured under a light microscope, we witness the intricate web-like arrangement tissue. This vital system ensures essential nutrients are distributed from roots to shoots for growth and development. The water lily leaf showcases another mesmerizing view through a light micrograph. Here, we observe elongated phloem fibers running parallel to each other like veins on this aquatic beauty's surface. Switching gears to SEM imaging, we encounter an enchanting sight on a silver birch twig. The high-resolution image captures xylem vessels alongside phloem cells with astonishing detail—each playing its crucial role in maintaining fluid balance and nutrient transport within this majestic tree. A closer look at water fern rhizome under a light microscope uncovers an interconnected network tissues supporting its underground growth. These structures ensure efficient distribution of resources necessary for survival in challenging environments. Examining pine tree stems through light microscopy allows us to appreciate how intricately woven strands contribute to their robustness and longevity—a testament to nature's engineering marvels. Delving into tomato leaf anatomy via light micrographs reveals densely packed clusters of sieve tube elements forming part of its extensive phloem network—an integral component enabling fruit production and overall plant health. Pondweed stems provide yet another captivating glimpse into the world beneath our feet when observed using advanced microscopic techniques. Phloem fibers intertwine with xylem vessels, showcasing the plant's ability to adapt and thrive in aquatic environments.