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Vascular Systems in plants – an introduction to plant anatomy

Vascular Systems in plants – an introduction to plant anatomy. Cells & Tissues. Organization into structural entities. Endodermis. Pericycle. primitive vascular plants. Lycopodium gnidiodes. primitive vascular plants. Lycopodium claviatum. PROTOXYLEM. PROTOXYLEM PHLOEM.

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Vascular Systems in plants – an introduction to plant anatomy

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  1. Vascular Systems in plants – an introduction to plant anatomy Cells & Tissues. Organization into structural entities.

  2. Endodermis Pericycle primitive vascular plants Lycopodium gnidiodes

  3. primitive vascular plants Lycopodium claviatum

  4. PROTOXYLEM PROTOXYLEM PHLOEM Detail of a cross section of the stem of Psilotum primitive vascular plants Psilotum has no leaves or roots!

  5. XYLEM PHLOEM TRABECULA primitive vascular plants Trabeculae are modified endodermal cells – pericycle surround vascular bundle.

  6. PERICYCLE PHLOEM ENDODERMIS primitive vascular plants Rumohra

  7. PHLOEM FIBERS FIBERS PROTOPHLOEM Encephalartos. Gymnosperm

  8. PHLOEM RAY TRACHEIDS CAMBIUM PHLOEM Araucaria (Gymnosperm)

  9. EXTERNAL PHLOEM INTERNAL PHLOEM Cucurbita

  10. Zea maysMonocotyledon. (Atactostele) highly advanced

  11. Nymphoides stem Hydrophytes have a reduced xylem component in the vascular system. Here, only a few XYLEM VESSELS are visible. The phloem on the other hand appears to be well-developed, and consists of sieve tubescompanion cells and phloem parenchyma. I Several ASTROSCLERIEDS can be seen interspersed with the ground parenchyma

  12. Ligustrum (Privet) Leaf Advanced foliage leaf, dicotyledon. Note mesophyll divided into upper palisade and lower spongy layer. Smaller veins (like these) are embedded within the mesophyll, between palisade and spongy layers. These are MINOR veins

  13. Zea mays leaf

  14. cambium The pine leaf sunken stomate In Gymnosperm leaves such as the pine leaf, the vascular system is reduced to the central region. You should be able to see two vascular bundles in this example. The xylem is composed of TRACHEIDS and the phloem of SIEVE CELLS and ALBUMINOUS CELLS. endodermis vascular bundle endodermis

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