Phloem Collection (#5)

Dog rose stem, light micrograph
Dog rose stem. Polarised light micrograph of a cross-section through the stem of a dog rose (Rosa canina) plant. The outer cortex (black and red) is made of cork cambium tissue

Sunflower leaf, light micrograph
Sunflower leaf. Light micrograph of a transverse section through the midrib of a sunflower (Helianthus annuus) leaf. The upper and lower epidermis on the surfaces of the leaf are blue

Eucalyptus stem, light micrograph
Eucalyptus stem. Light micrograph of a transverse section through a one-year-old stem of a Eucalyptus (Eucalyptus globulus) plant

Black pepper stem, light micrograph
Black pepper stem. Polarised light micrograph of a transverse section through the stem of a black pepper (Pipa nigrum) plant

Ginger leaf, light micrograph
Ginger leaf. Light micrograph of a transverse section through the midrib of a ginger (Zingiber officinale) leaf. The lower and upper epidermis (blue)

Japanese sago palm root, light micrograph
Japanese sago palm root. Light micrograph of a transverse section through a root of a Japanese sago palm, (Cycas revoluta)

Young yew tree stem, light micrograph
Young yew tree stem. Light micrograph of a transverse section through a one-year-old stem of a yew tree (Taxus baccata). The epidermis (outer layer)

Willow stem, light micrograph
Willow stem. Light micrograph of a cross-section through the stem of a willow (Salix sp.) tree. At centre is the pith (white), surrounded by woody xylem tissue (pink)

Section through stem of bamboo
Bamboo vascular system. Light micrograph of a section through a bamboo stem showing its vascular tissue. The black holes at centre are xylem tubes formed by dead tissue

Maple stem, light micrograph
Maple stem. Polarised light micrograph of a cross-section through the stem of a field maple (Acer campestre). This shows the thick layer of cork (phellem)

Abnormal thistle stem, light micrograph
Abnormal thistle stem. Light micrograph of a normal (top) and abnormal (bottom) stem of the perennial sow thistle (Sonchus arvensis). The abnormal stem has grown in a flattened, or fasciated, manner

Water-lily leaf stem, light micrograph
Water-lily leaf stem. Light micrograph of a cross- section through the leaf stem (petiole) of a white water-lily (Nymphaea alba)

Dutchmans pipe plant stem. Light micrograph of a section through the stem of a dutchmans pipe plant (Aristolochia sipho). The inner blue circle is a layer of sclerenchyma fibres

Stem section, SEM
Stem section. Coloured scanning electron micrograph (SEM) of a section through a stem of a woody dicotyledon plant. This stem consists mainly of secondary xylem tissue (orange, centre)

Grass stem, SEM
Grass stem. Coloured scanning electron micrograph (SEM) of a section through a grass stem (family Graminaceae). At upper centre is the vascular bundle

Bamboo stem, SEM
Bamboo stem. Coloured scanning electron micrograph (SEM) of a section through a bamboo stem (Phyllostachys sp.). Vascular bundles can be seen (bright yellow) containing xylem (larger openings)

Woody stem section, SEM
Woody stem section. Coloured scanning electron micrograph (SEM) of a section through a stem of a woody plant. At upper centre is the pith (orange), which consists of soft, spongy parenchyma cells

Bracken rhizome, light micrograph
Bracken rhizome. Light micrograph of part of a cross-section through a rhizome from the bracken Pteridium aquilinum. The centre of the rhizome is off top, while the outer surface is off bottom

Cucumber stem tissue, light micrograph
Cucumber stem tissue. Light micrograph of a cross- section through the stem of a cucumber (Cucurbita sp.) showing a close up of the sieve cells (blue, two at centre left)

Mistletoe vascular bundle, LM
Mistletoe vascular bundle. Light micrograph (LM) of a section of mistletoe (Viscum album) stem in cross-section, showing a vascular bundle

Buttercup stem, light micrograph
Buttercup stem. Coloured light micrograph of a section through a buttercup stem (Ranunculus sp.) showing the circular-shaped vascular bundle (right)

Root section, SEM
Root section. Coloured scanning electron micrograph (SEM) of a section through a root of a woody dicotyledon plant. This root consists of secondary xylem tissue (yellow, centre)

Art of vascular system in a root
Illustration of the vascular system in a plant root. Cross-sections through different layers of this root show elements of its internal anatomy

Cucumber stem, light micrograph
Cucumber stem. Light micrograph of a cross-section through part of a vascular bundle from a cucumber (Cucurbita sp.). This vascular bundle is from the stem of the cucumber

Mistletoe stem, LM
Mistletoe stem. Light micrograph (LM) of a mistletoe (Viscum album) stem in cross-section, showing nine vascular bundles radiating out from the centre of the stem

Conifer needle, SEM
Conifer needle. Coloured scanning electron micrograph (SEM) of a section through a needle (leaf) from a conifer tree, showing the vascular bundle (large round cluster)

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

Nasturtium leaf, SEM
Nasturtium leaf. Coloured scanning electron micrograph (SEM) of the underside of a nasturtium leaf (Tropaeolum sp.). Numerous hairs (trichomes) cover the surface

Section through a pine needle, LM
Section through a pine needle. Light micrograph (LM) of a section through the needle (leaf) of a pine tree, Pinus sp.. The centre of the needle is occupied by two vascular bundles

Leaf midrib, SEM
Leaf midrib. Coloured scanning electron micrograph (SEM) of a section through the midrib of a leaf from the Common Box (Buxus sempervirens)

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

Pondweed stem, light micrograph
Pondweed stem. Light micrograph of a transverse section through the stem of a pondweed (Potamogeton sp.) plant. All aquatic plants (hydrophytes) have a similar stem structure

Water milfoil stem, light micrograph
Water milfoil stem. Light micrograph of a transverse section through the stem of the aquatic whorled water milfoil (Myriophyllum verticillatum) plant

Waterweed stem, light micrograph
Waterweed stem. Polarised light micrograph of a transverse section through a stem of the aquatic western waterweed (Elodea nuttallii) plant

Mistletoe stem, light micrograph
Mistletoe stem. Polarised light micrograph of a transverse section through the stem of a mistletoe (Viscum album) plant. The epidermis (outer layer)

Mares tail stem, light micrograph
Mares tail stem. Polarised light micrograph of a transverse section through a stem of the aquatic mares tail (Hippuris vulgaris) plant. All aquatic plants (hydrophytes) have a similar stem structure

Grape root, light micrograph
Grape root. Light micrograph of a transverse section through a grape vine (Vitis sp.) root. At centre are xylem (red) and tracheid (green) cells, which transport water around the plant

Sweet potato stem, light micrograph
Sweet potato stem. Light micrograph of a transverse section through part of a sweet potato (Ipomoea batatas) stem. At bottom is a large area of pith, consisting of parenchyma cells

Clematis stem, light micrograph
Clematis stem. Light micrograph of a transverse section through the stem of a clematis (Clematis flammula) plant. At the centre of the stem is a large area of pith, consisting of parenchyma cells

Sweet potato leaf, light micrograph
Sweet potato leaf. Light micrograph of a transverse section through the midrib of a sweet potato (Ipomoea batatas) leaf. The semicircular structure at centre is the vascular bundle

Liana stem, light micrograph
Liana stem. Light micrograph of a transverse section through the stem of a liana (Aristolochia tormentosa), or woody vine. At the centre of the stem is the pith, consisting of parenchyma cells

Rosemary leaf structure, SEM
Rosemary leaf. Coloured scanning electron micrograph (SEM) of a freeze-fracture through a leaf from a rosemary plant (Rosmarinus officinalis). The fracture has revealed vascular tissue (green)

Sago cycad leaf, SEM
Sago cycad leaf. Coloured scanning electron micrograph (SEM) of a section through a sago cycad (Cycas revoluta) leaf. At lower centre and left are vascular bundles (orange clusters)

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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.